DxChart<T> Class

A control that visualizes bound data as graphs: bar, area, line, and others.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v23.2.dll

NuGet Package: DevExpress.Blazor

Declaration

public class DxChart<T> :
    DxChart,
    IModelProvider<ChartArgumentAxisModel>,
    IModelProvider<ChartValueAxisModel>,
    IModelProvider<ChartZoomAndPanSettingsModel>,
    IModelProvider<ChartScrollBarSettingsModel>,
    IModelProvider<ChartPaneModel>,
    IModelProvider<ChartCommonSeriesBaseModel>,
    IComponentContainer<IXYChartSeriesModel>

Type Parameters

Name	Description
T	The data item type.

Remarks

The DevExpress Chart component (<DxChart>) allows you to create Line, Area, Bar, Bubble, and other chart types for Blazor applications.

Run Demo: Charts - Overview

Add a Chart to a Project

Follow the steps below to add the Chart component to an application:

1. Use a DevExpress Project Template to create a new Blazor Server or Blazor WebAssembly application. If you use a Microsoft project template or already have a Blazor project, configure your project to incorporate DevExpress Blazor components.
2. Add the <DxChart>…</DxChart> markup to a .razor file.
3. Bind the component to data.
4. Configure the component: add series and axes, specify a legend, titles, tooltips, and so on (see the sections below).

Read Tutorial: Get Started with Charts Watch Video: Get Started with Charts

Chart Types

<DxChart> contains a variety of 2D series types that display data as a single chart or a combination of different series.

Chart View	Series Type	Demo
Area	DxChartAreaSeries DxChartRangeAreaSeries DxChartSplineAreaSeries DxChartStackedAreaSeries DxChartStackedSplineAreaSeries DxChartFullStackedAreaSeries DxChartFullStackedSplineAreaSeries DxChartStepAreaSeries	Charts - Area Charts - Range Area Series
Bar	DxChartBarSeries DxChartRangeBarSeries DxChartStackedBarSeries DxChartFullStackedBarSeries Side-by-Side Stacked and Full-Stacked Bar Series	Charts - Bar Charts - Range Bar Series
Bubble	DxChartBubbleSeries	Charts - Bubble
Financial	DxChartCandlestickSeries DxChartStockSeries	Charts - Financial
Line	DxChartLineSeries DxChartSplineSeries DxChartStackedLineSeries DxChartStackedSplineSeries DxChartFullStackedLineSeries DxChartFullStackedSplineSeries DxChartStepLineSeries	Charts - Line
Scatter	DxChartScatterSeries	Charts - Scatter

To create a pie or donut chart, use the DxPieChart<T> component with the DxPieChartSeries<T, TArgument, TValue> object.

Bind to Data

Use the Data property to specify an IEnumerable<T> data source, and the series ArgumentField and ValueField properties to specify data source fields that contain arguments and values for chart points. For a sample data source, refer to our GitHub repository.

Note

The Chart operates in bound mode only.

Razor

<DxChart Data="@SalesData">
    <DxChartLineSeries Name="2017" 
                       Filter="@((SaleInfo s) => s.Date.Year == 2017)"
                       ArgumentField="@(s => s.City)" 
                       ValueField="@(s => s.Amount)" 
                       SummaryMethod="Enumerable.Sum"/>
    <DxChartLineSeries Name="2018" 
                       Filter="@((SaleInfo s) => s.Date.Year == 2018)"
                       ArgumentField="@(s => s.City)" 
                       ValueField="@(s => s.Amount)" 
                       SummaryMethod="Enumerable.Sum"/>
    <DxChartLineSeries Name="2019" 
                       Filter="@((SaleInfo s) => s.Date.Year == 2019)"
                       ArgumentField="@(s => s.City)" 
                       ValueField="@(s => s.Amount)" 
                       SummaryMethod="Enumerable.Sum"/>
    <DxChartLegend Position="RelativePosition.Outside" HorizontalAlignment="HorizontalAlignment.Right" />
</DxChart>

@code {
    IEnumerable<SaleInfo> SalesData;

    protected override async Task OnInitializedAsync() {
        SalesData = await Sales.GetSalesAsync();
    }
}

SaleInfo

using System;

public class SaleInfo {
    public int OrderId { get; set; }
    public string Region { get; set; }
    public string Country { get; set; }
    public string City { get; set; }
    public int Amount { get; set; }
    public DateTime Date { get; set; }
}

Sales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public class Sales {
    static IList<SaleInfo> dataSource;
    static Sales() {
        CreateDataSource();
    }

    public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
        return Task.FromResult(dataSource.AsQueryable());
    }

    static void CreateDataSource() {
        dataSource = new List<SaleInfo> {
        new SaleInfo {
                OrderId = 10248,
                Region = "North America",
                Country = "United States",
                City = "New York",
                Amount = 1740,
                Date = DateTime.Parse("2017/01/06")
            },
            new SaleInfo {
                OrderId = 10249,
                Region = "North America",
                Country = "United States",
                City = "Los Angeles",
                Amount = 850,
                Date = DateTime.Parse("2017/01/13")
            },
            new SaleInfo {
                OrderId = 10250,
                Region = "North America",
                Country = "United States",
                City = "Denver",
                Amount = 2235,
                Date = DateTime.Parse("2017/01/07")
            },
            new SaleInfo {
                OrderId = 10251,
                Region = "North America",
                Country = "Canada",
                City = "Vancouver",
                Amount = 1965,
                Date = DateTime.Parse("2017/01/03")
            },
            new SaleInfo {
                OrderId = 10252,
                Region = "North America",
                Country = "Canada",
                City = "Edmonton",
                Amount = 880,
                Date = DateTime.Parse("2017/01/10")
            },
            new SaleInfo {
                OrderId = 10253,
                Region = "South America",
                Country = "Brazil",
                City = "Rio de Janeiro",
                Amount = 5260,
                Date = DateTime.Parse("2017/01/17")
            },
            new SaleInfo {
                OrderId = 10254,
                Region = "South America",
                Country = "Argentina",
                City = "Buenos Aires",
                Amount = 2790,
                Date = DateTime.Parse("2017/01/21")
            },
            new SaleInfo {
                OrderId = 10255,
                Region = "South America",
                Country = "Paraguay",
                City = "Asuncion",
                Amount = 3140,
                Date = DateTime.Parse("2017/01/01")
            },
            new SaleInfo {
                OrderId = 10256,
                Region = "Europe",
                Country = "United Kingdom",
                City = "London",
                Amount = 6175,
                Date = DateTime.Parse("2017/01/24")
            },
            new SaleInfo {
                OrderId = 10257,
                Region = "Europe",
                Country = "Germany",
                City = "Berlin",
                Amount = 4575,
                Date = DateTime.Parse("2017/01/11")
            },
            // ...
    };
    }
}

If the data source collection implements the INotifyCollectionChanged interface, the Chart is updated automatically each time the collection changes. Otherwise, use the RefreshData method to reload data and redraw the component. To re-render the Chart area without a data reload, call the RedrawAsync method.

To track the moment when the chart rendering is finished and the component is completely loaded, handle the Rendered event.

Series

A chart series is a collection of related data points. You can specify common settings for all chart series, or add series to the component’s markup and configure series-specific settings individually.

If you have several series, place them at the same chart hierarchy level. Note that DxChart renders series based on their order in the chart’s markup. If you need to change the rendering order, place series to the corresponding positions in the markup.

Common Settings

Use the DxChartCommonSeries object to specify common settings for all chart series. The SeriesType property specifies the chart type.

Note

We do not recommend that you use the SeriesType property to generate series that require assigning specific fields (for example, DxChartBubbleSeries). To generate such series, use the SeriesTemplate property.

Razor

<DxChart Data="@SalesData">
    <DxChartCommonSeries NameField="@((SaleInfo s) => s.Date.Year)"
                         ArgumentField="@((SaleInfo s) => s.City)"
                         ValueField="@((SaleInfo s) => s.Amount)"
                         SeriesType="ChartSeriesType.Bar"
                         SummaryMethod="Enumerable.Max">
    </DxChartCommonSeries>
</DxChart>

@code {
    IEnumerable<SaleInfo> SalesData;

    protected override async Task OnInitializedAsync() {
        SalesData = await Sales.GetSalesAsync();
    }
}

SaleInfo

using System;

public class SaleInfo {
    public int OrderId { get; set; }
    public string Region { get; set; }
    public string Country { get; set; }
    public string City { get; set; }
    public int Amount { get; set; }
    public DateTime Date { get; set; }
}

Sales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public class Sales {
    static IList<SaleInfo> dataSource;
    static Sales() {
        CreateDataSource();
    }

    public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
        return Task.FromResult(dataSource.AsQueryable());
    }

    static void CreateDataSource() {
        dataSource = new List<SaleInfo> {
        new SaleInfo {
                OrderId = 10248,
                Region = "North America",
                Country = "United States",
                City = "New York",
                Amount = 1740,
                Date = DateTime.Parse("2017/01/06")
            },
            new SaleInfo {
                OrderId = 10249,
                Region = "North America",
                Country = "United States",
                City = "Los Angeles",
                Amount = 850,
                Date = DateTime.Parse("2017/01/13")
            },
            new SaleInfo {
                OrderId = 10250,
                Region = "North America",
                Country = "United States",
                City = "Denver",
                Amount = 2235,
                Date = DateTime.Parse("2017/01/07")
            },
            new SaleInfo {
                OrderId = 10251,
                Region = "North America",
                Country = "Canada",
                City = "Vancouver",
                Amount = 1965,
                Date = DateTime.Parse("2017/01/03")
            },
            new SaleInfo {
                OrderId = 10252,
                Region = "North America",
                Country = "Canada",
                City = "Edmonton",
                Amount = 880,
                Date = DateTime.Parse("2017/01/10")
            },
            new SaleInfo {
                OrderId = 10253,
                Region = "South America",
                Country = "Brazil",
                City = "Rio de Janeiro",
                Amount = 5260,
                Date = DateTime.Parse("2017/01/17")
            },
            new SaleInfo {
                OrderId = 10254,
                Region = "South America",
                Country = "Argentina",
                City = "Buenos Aires",
                Amount = 2790,
                Date = DateTime.Parse("2017/01/21")
            },
            new SaleInfo {
                OrderId = 10255,
                Region = "South America",
                Country = "Paraguay",
                City = "Asuncion",
                Amount = 3140,
                Date = DateTime.Parse("2017/01/01")
            },
            new SaleInfo {
                OrderId = 10256,
                Region = "Europe",
                Country = "United Kingdom",
                City = "London",
                Amount = 6175,
                Date = DateTime.Parse("2017/01/24")
            },
            new SaleInfo {
                OrderId = 10257,
                Region = "Europe",
                Country = "Germany",
                City = "Berlin",
                Amount = 4575,
                Date = DateTime.Parse("2017/01/11")
            },
            // ...
    };
    }
}

Run Demo: Charts - Autogenerated Series

The table below lists common settings for chart series:

Member	Description
SummaryMethod	Specifies the method that calculates summaries for points with the same argument value.
ArgumentField	Specifies a data source field that stores arguments for series values.
Filter	Specifies a filter that is applied to data source objects.
NameField	Specifies a data source field that is used to group data by series.
PaneField	Specifies which data source field contains pane names for chart series.
BreakOnEmptyPoints	Specifies whether the series should break on points with null values.
SeriesTemplate	Specifies a series template.
ValueField	Specifies a data source field that contains values for series points.

Note

Individual series settings have priority over common series settings.

Type-Specific Settings

Type-specific series have their own settings. For example, bubble series display chart data as points with different sizes called “bubbles”. To specify a data source field that defines bubble sizes, use the DxChartBubbleSeries.SizeField property. You can also use MinBubbleSize and MaxBubbleSize properties to specify diameters of the biggest and smallest “bubbles” in the series.

Razor

@using System.Drawing

<DxChart Data="@SalesData">
    <DxChartBubbleSeries Name="United States" 
                         Filter="@((SaleInfo s) => s.Country == "United States")"
                         ArgumentField="@(s => s.Date.DayOfWeek.ToString())"
                         ValueField="@(s => s.Date.Year)"
                         SizeField="@(s => s.Amount)"
                         Color="@(Color.FromArgb(208, 208, 208))"
                         SummaryMethod="Enumerable.Max" />
    <DxChartBubbleSeries Name="Canada" 
                         Filter="@((SaleInfo s) => s.Country == "Canada")"
                         ArgumentField="@(s => s.Date.DayOfWeek.ToString())"
                         ValueField="@(s => s.Date.Year)"
                         SizeField="@(s => s.Amount)"
                         Color="@(Color.FromArgb(252, 58, 48))"
                         SummaryMethod="Enumerable.Max" />
    <DxChartLegend Position="RelativePosition.Outside" HorizontalAlignment="HorizontalAlignment.Right" />
</DxChart>

@code {
    IEnumerable<SaleInfo> SalesData;

    protected override async Task OnInitializedAsync() {
        SalesData = await Sales.GetSalesAsync();

SaleInfo

using System;

public class SaleInfo {
    public int OrderId { get; set; }
    public string Region { get; set; }
    public string Country { get; set; }
    public string City { get; set; }
    public int Amount { get; set; }
    public DateTime Date { get; set; }
}

Sales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public class Sales {
    static IList<SaleInfo> dataSource;
    static Sales() {
        CreateDataSource();
    }

    public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
        return Task.FromResult(dataSource.AsQueryable());
    }

    static void CreateDataSource() {
        dataSource = new List<SaleInfo> {
        new SaleInfo {
                OrderId = 10248,
                Region = "North America",
                Country = "United States",
                City = "New York",
                Amount = 1740,
                Date = DateTime.Parse("2017/01/06")
            },
            new SaleInfo {
                OrderId = 10249,
                Region = "North America",
                Country = "United States",
                City = "Los Angeles",
                Amount = 850,
                Date = DateTime.Parse("2017/01/13")
            },
            new SaleInfo {
                OrderId = 10250,
                Region = "North America",
                Country = "United States",
                City = "Denver",
                Amount = 2235,
                Date = DateTime.Parse("2017/01/07")
            },
            new SaleInfo {
                OrderId = 10251,
                Region = "North America",
                Country = "Canada",
                City = "Vancouver",
                Amount = 1965,
                Date = DateTime.Parse("2017/01/03")
            },
            new SaleInfo {
                OrderId = 10252,
                Region = "North America",
                Country = "Canada",
                City = "Edmonton",
                Amount = 880,
                Date = DateTime.Parse("2017/01/10")
            },
            new SaleInfo {
                OrderId = 10253,
                Region = "South America",
                Country = "Brazil",
                City = "Rio de Janeiro",
                Amount = 5260,
                Date = DateTime.Parse("2017/01/17")
            },
            new SaleInfo {
                OrderId = 10254,
                Region = "South America",
                Country = "Argentina",
                City = "Buenos Aires",
                Amount = 2790,
                Date = DateTime.Parse("2017/01/21")
            },
            new SaleInfo {
                OrderId = 10255,
                Region = "South America",
                Country = "Paraguay",
                City = "Asuncion",
                Amount = 3140,
                Date = DateTime.Parse("2017/01/01")
            },
            new SaleInfo {
                OrderId = 10256,
                Region = "Europe",
                Country = "United Kingdom",
                City = "London",
                Amount = 6175,
                Date = DateTime.Parse("2017/01/24")
            },
            new SaleInfo {
                OrderId = 10257,
                Region = "Europe",
                Country = "Germany",
                City = "Berlin",
                Amount = 4575,
                Date = DateTime.Parse("2017/01/11")
            },
            // ...
    };
    }
}

Run Demo: Charts - Bubble Series

For line series, you can use the DxChartSeriesPoint component to customize the point’s color, size, symbol, and visibility. These settings apply to all points in a series. To override individual point settings, handle the chart’s CustomizeSeriesPoint event.

Razor

@inject WeatherForecastService ForecastService

<DxChart Data="@ChartData" CustomizeSeriesPoint="@PreparePointColor">
    <DxChartLineSeries AggregationMethod="@(i => (int)i.Average())"
                       Color="@System.Drawing.Color.Gray"
                       ValueField="@((WeatherForecast i) => i.TemperatureF)"
                       ArgumentField="@(i => i.Date.Date)"
                       Name="Temperature, F">
        <DxChartSeriesPoint Symbol="ChartPointSymbol.Polygon" Color="@System.Drawing.Color.Gray" Size="25" />
    </DxChartLineSeries>
</DxChart>

@code {
    WeatherForecast[] ChartData;

    protected override async Task OnInitializedAsync() {
        ChartData = await ForecastService.GetForecastAsync();
    }

    protected void PreparePointColor(ChartSeriesPointCustomizationSettings pointSettings) {
        double value = (double)pointSettings.Point.Value;
        if (value > 75)
            pointSettings.PointAppearance.Color = System.Drawing.Color.Red;
        else if (value < 25)
            pointSettings.PointAppearance.Color = System.Drawing.Color.Blue;
    }
}

WeatherForecast

using System;

public class WeatherForecast {
    public DateTime Date { get; set; }
    public int TemperatureC { get; set; }
    public double TemperatureF => Math.Round((TemperatureC * 1.8 + 32), 2);
    public double Precipitation { get; set; }
}

WeatherForecastService

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Threading;
    using System.Threading.Tasks;

    public class WeatherForecastService {
    // ...
        private List<WeatherForecast> Forecast { get; set; }

        public WeatherForecastService() {
        // ...
            Forecast = CreateForecast();
        }

// ...
        private List<WeatherForecast> CreateForecast() {
            var rng = new Random();
            DateTime startDate = DateTime.Now;
            return Enumerable.Range(1, 15).Select(index => new WeatherForecast {
                Date = startDate.AddDays(index),
                TemperatureC = rng.Next(-20, 55),
            }).ToList();
        }

        public Task<WeatherForecast[]> GetForecastAsync(CancellationToken ct = default) {
            return Task.FromResult(Forecast.ToArray());
        }
    }

Program.cs

// ...
builder.Services.AddSingleton<WeatherForecastService>();

For the line series and constant line you can specify the dash style. For example, make the line dashed, dotted, or apply one of the predefined patterns.

The following example shows how to define a dashed line series:

<DxChart Data="@SalesData">
    <DxChartLineSeries Name="Total Sales"
                       ArgumentField="@((SaleInfo s) => s.City)"
                       ValueField="@((SaleInfo s) => s.Amount)"
                       SummaryMethod="Enumerable.Sum"
                       DashStyle="ChartDashStyle.Dash">
    </DxChartLineSeries>
</DxChart>

Run Demo: Charts - Series Point Customization

Series Labels

Use the DxChartSeriesLabel component to configure labels for series data points. These settings apply to all labels in the series. To display series labels, set the DxChartSeriesLabel.Visible property to true.

To override individual label settings, handle the chart’s CustomizeSeriesPoint event and use the event argument’s PointLabel property.

Razor

@inject WeatherForecastService ForecastService

<DxChart Data="@ChartData" CustomizeSeriesPoint="@PreparePointLabel">
    <DxChartLineSeries AggregationMethod="@(i => (int)i.Average())"
                       ValueField="@((WeatherForecast i) => i.TemperatureF)"
                       ArgumentField="@(i => i.Date.Date)"
                       Name="Temperature, F">
        <DxChartSeriesLabel Position="RelativePosition.Outside">
            <DxChartSeriesLabelConnector Visible="true" Width="3" />
        </DxChartSeriesLabel>
    </DxChartLineSeries>
</DxChart>

@code {
    WeatherForecast[] ChartData;

    protected override async Task OnInitializedAsync() {
        ChartData = await ForecastService.GetForecastAsync();
    }

    protected void PreparePointLabel(ChartSeriesPointCustomizationSettings pointSettings) {
        double value = (double)pointSettings.Point.Value;
        if (value > 25 && value < 75)
            pointSettings.PointLabel.Visible = true;
    }
}

WeatherForecast

using System;

public class WeatherForecast {
    public DateTime Date { get; set; }
    public int TemperatureC { get; set; }
    public double TemperatureF => Math.Round((TemperatureC * 1.8 + 32), 2);
    public double Precipitation { get; set; }
}

WeatherForecastService

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Threading;
    using System.Threading.Tasks;

    public class WeatherForecastService {
    // ...
        private List<WeatherForecast> Forecast { get; set; }

        public WeatherForecastService() {
        // ...
            Forecast = CreateForecast();
        }

// ...
        private List<WeatherForecast> CreateForecast() {
            var rng = new Random();
            DateTime startDate = DateTime.Now;
            return Enumerable.Range(1, 15).Select(index => new WeatherForecast {
                Date = startDate.AddDays(index),
                TemperatureC = rng.Next(-20, 55),
            }).ToList();
        }

        public Task<WeatherForecast[]> GetForecastAsync(CancellationToken ct = default) {
            return Task.FromResult(Forecast.ToArray());
        }
    }

Program.cs

// ...
builder.Services.AddSingleton<WeatherForecastService>();

Run Demo: Charts - Series Label Customization

Use the LabelOverlap property to specify how the chart resolves overlapping labels.

The code below hides overlapping point labels:

<DxChart Data="@SalesData" LabelOverlap="ChartLabelOverlap.Hide">
    @*...*@
</DxChart>

Run Demo: Charts - Dynamic Series

You can also use the DxChartSeriesLabelBorder component to configure label borders. Set the Visible property to true to display borders and use Color, DashStyle, or Width properties to customize border appearance.

The table below lists settings for series labels:

Member	Description
Alignment	Specifies series label horizontal alignment (relative to the corresponding data point).
ArgumentFormat	Specifies the display format for series label values.
BackgroundColor	Specifies the label background color.
FormatPattern	Specifies a string pattern that formats series label text.
HorizontalOffset	Specifies the horizontal offset of series labels.
MaxLabelCount	Specifies the maximum number of point labels that the DxChartSeries displays.
Position	Specifies the label’s position.
RotationAngle	Specifies the rotation angle of series labels.
ShowForZeroValues	Specifies whether to show labels for series points with zero values.
ValueFormat	Specifies the display format for series label values.
VerticalOffset	Specifies series label vertical offset.

Axes

Primary X and Y axes are automatically created based on the first series’ data type. The DxChartArgumentAxis class defines the X-axis, and the DxChartValueAxis class defines the Y-axis. The Visible property specifies an axis visibility. The DxChartAxisTitle object specifies the axis title.

Axis labels are displayed on the chart’s X-axis. The <DxChart> uses smart label management to ensure that labels do not overlap. The Format property specifies the axis label’s format.

If the data range or format is series-specific, each series can use its own Y-axis. The number of Y-axes in a chart is not limited.

<DxChart Data="@SalesData">
    <DxChartTitle Text="Sales amount" />
    <DxChartLegend Position="RelativePosition.Outside" />
    <DxChartValueAxis>
        <DxChartAxisLabel Format="ChartElementFormat.Percent()"></DxChartAxisLabel>
        <DxChartAxisTitle Text="Amount"></DxChartAxisTitle>
    </DxChartValueAxis>
    <DxChartValueAxis Name="TotalAxis" Alignment="ChartAxisAlignment.Far">
        <DxChartAxisTitle Text="Total Amount"></DxChartAxisTitle>
    </DxChartValueAxis>
    <DxChartArgumentAxis>
        <DxChartAxisTitle Text="Cities"></DxChartAxisTitle>
    </DxChartArgumentAxis>
    @* ... *@
</DxChart>

You can also customize the axes in the following ways:

• Specify an axis position. Use the Alignment property.
• Define the visual range. Use the DxChartAxisRange object.
• Swap the axes to display the X-axis vertically and the Y-axis horizontally. Use the DxChart.Rotated property.
• Change an axis type. Use the DxChartArgumentAxis.Type and DxChartAxis.Type properties.
• Cut a part of an axis. Use the DxChartScaleBreak component.
• Specify next to which edge the Chart should display an axis. Use the Alignment property.
• Shift an axis. Use the Offset property to specify the shift in pixels or the CustomPosition property to specify the axes intersection point.
• Invert an axis. Use the Inverted property.
• Mark an individual axis value. Use the DxChartConstantLine object.

Axis Ticks

Major ticks divide an axis into sections that mark values on this axis. Minor ticks divide an axis segment between two neighboring major ticks. Minor ticks cannot be displayed on the axis of Discrete type.

Use the DxChartAxisTick class to customize appearance of major ticks and the DxChartAxisMinorTick class for minor ticks.

You can also use the following properties to manage axis ticks:

• DiscreteDivisionMode: Specifies whether ticks and grid lines lie between or next to axis labels.
• TickInterval: Specifies the interval between major ticks. Does not apply to discrete axes.
• MinorTickInterval: Specifies the interval between minor ticks. Applies only to continuous axes.
• MinorTickCount: Specifies the number of minor ticks between two neighboring major ticks.

Run Demo: Charts - Multiple Axes

Run Demo: Charts - Rotation

Run Demo: Charts - Axis Types

Axis Labels

Use the DxChartAxisLabel component to show and configure labels for axis ticks. To specify axis label visibility, use the DxChartAxisLabel.Visible property.

DxChart allows you to specify how to arrange axis labels. When they overlap, use the Overlap property to rearrange such labels. Based on the Overlap property value, specify the RotationAngle or StaggeringSpacing property.

The following example uses the drop-down menu to rearrange overlapping axis labels.

<DxChart Data="@GetData()" Width="100%">
    <DxChartTitle Text="Population by Country 2023" CssClass="mb-1"/>
    <DxChartLegend Visible="false"/>
    <DxChartLineSeries ArgumentField="@((DataPoint s) => s.Country)"
                       ValueField="@((DataPoint s) => s.Value)"/>
    @* ... *@
    <DxChartArgumentAxis>
        <DxChartAxisLabel Overlap="@CurrentOverlapMode"
                          WordWrap="ChartWordWrap.None"/>
    </DxChartArgumentAxis>
</DxChart>

@code {
    ChartAxisLabelOverlap CurrentOverlapMode = ChartAxisLabelOverlap.Stagger;
    List<DataPoint> GetData() {
        var result = new List<DataPoint>(14);
        // ...
        return result;
    }
    public class DataPoint {
        public string Country { get; set; }
        public int Value { get; set; }
        public DataPoint(string country, int value) {
            Country = country;
            Value = value;
        }
    }
}

Run Demo: Chart - Label Overlap

The DxChart component also allows you to reserve an area for an axis and its labels (the PlaceholderSize property). When axis labels overflow this region, use the TextOverflow property to specify how axis labels are truncated or the WordWrap property to specify how they are wrapped.

The following example changes the content area size for the argument axis and uses drop-down menus to choose how to display axis labels:

<DxChart Data="@GetData()" Width="100%" Height="500" Rotated="true">
    <DxChartTitle Text="Pizza Shop Complaints" CssClass="mb-2" />
    <DxChartLegend Visible="false" />
        <DxChartBarSeries ArgumentField="@((DataPoint s) => s.Complaint)"
                          ValueField="@((DataPoint s) => s.Count)" />
    <DxChartTooltip Enabled="true">
        <div style="margin: 0.75rem">
            <div class="fw-bold">@context.Point.Argument</div>
            <div>Complaint frequency: @context.Point.Value</div>
        </div>
    </DxChartTooltip>
    <DxChartArgumentAxis PlaceholderSize="@CurrentPlaceholderSize">
        <DxChartAxisLabel WordWrap="@CurrentWordWrap"
                          TextOverflow="@CurrentTextOverflow" />
    </DxChartArgumentAxis>
</DxChart>

@code {
    ChartTextOverflow CurrentTextOverflow = ChartTextOverflow.Ellipsis;
    ChartWordWrap CurrentWordWrap = ChartWordWrap.Normal;
    double CurrentPlaceholderSize = 55;
    List<DataPoint> GetData() {
        List<DataPoint> result = new List<DataPoint>(7);
        result.Add(new DataPoint("Delayed delivery", 1123));
        result.Add(new DataPoint("Cold pizza", 780));
        result.Add(new DataPoint("Damaged pizza", 321));
        result.Add(new DataPoint("Wrong size delivered", 222));
        result.Add(new DataPoint("Not enough cheese", 120));
        result.Add(new DataPoint("Incorrect billing", 89));
        result.Add(new DataPoint("Underbaked or Overbaked", 52));
        return result;
    }
    public class DataPoint {
        public string Complaint { get; set; }
        public int Count { get; set; }
        public DataPoint(string complaint, int count) {
            Complaint = complaint;
            Count = count;
        }
    }
}

Run Demo: Chart - Text Overflow and Word Wrap

The table blow lists customizable settings for axis labels:

Member	Description
Alignment	Specifies the horizontal alignment for axis labels.
DisplayMode	Specifies how the chart displays axis labels.
Format	Specifies the display format for axis labels.
IndentFromAxis	Specifies the indent between an axis and its labels.
Position	Specifies axis label position.
MaxLabelCount	Specifies the maximum number of point labels that the DxChartSeries displays.
Position	Specifies the label’s position.
RotationAngle	Specifies the rotation angle of axis labels when the Overlap or DisplayMode property is set to Rotate.
StaggeringSpacing	Specifies the space between two rows of axis labels when the Overlap or DisplayMode property is set to Stagger.

Legend

A chart’s legend lists all chart series. The DxChartLegend component implements the chart legend. Use the Visible property and series’ Name property to specify the legend’s visibility, and the Position property to specify the legend’s position.

Enable the AllowToggleSeries property to display checkboxes that toggle the visibility of individual series.

<DxChart Data="@SalesData">
    <DxChartLegend AllowToggleSeries="true" 
                   Orientation="Orientation.Vertical" 
                   HorizontalAlignment="HorizontalAlignment.Right">
        <DxChartTitle Text="Years">
            <DxChartSubTitle Text="(2017-2019)"></DxChartSubTitle>
        </DxChartTitle>
    </DxChartLegend>
    <DxChartBarSeries Name="2017" ... />
    <DxChartBarSeries Name="2018" ... />
    <DxChartLineSeries Name="2019" ... />
        <DxChartSeriesLegendItem IconCssClass="oi oi-flag">
            <TextTemplate>Last year</TextTemplate>
        </DxChartSeriesLegendItem>
    </DxChartLineSeries>
</DxChart>

Run Demo: Charts - Legend Customization

Titles and Subtitles

The <DxChart> component can display titles (DxChartTitle) and subtitles (DxChartSubTitle) for the chart component and legend.

<DxChart Data="@SalesData">
   <DxChartTitle Text="Sales amount">
       <DxChartSubTitle Text="by cities"></DxChartSubTitle>
   </DxChartTitle>
    <DxChartLegend AllowToggleSeries="true" 
                   Orientation="Orientation.Vertical" 
                   HorizontalAlignment="HorizontalAlignment.Right">
        <DxChartTitle Text="Years">
            <DxChartSubTitle Text="(2017-2019)"></DxChartSubTitle>
        </DxChartTitle>
    </DxChartLegend>
</DxChart>

Run Demo: Charts - Legend Customization

Tooltips

The Chart can display tooltips when the mouse pointer is above a chart series. Use the DxChartTooltip element to specify tooltip templates.

The Tooltip class contains the following properties:

• Enabled - Specifies whether tooltips are enabled. Set this property to true to display tooltips.
• Position - Specifies the tooltip position.

<DxChart Data="@SalesData"
         CssClass="mw-1100">
    <DxChartTitle Text="Sales amount" />

    <DxChartTooltip Enabled="true" Position="RelativePosition.Outside">
        <div style="margin: 0.75rem">
            <div class="font-weight-bold">@context.Point.SeriesName</div>
            <div>City: @context.Point.Argument</div>
            <div>Amount: @context.Point.Value</div>
        </div>
    </DxChartTooltip>

    <DxChartBarSeries Name="2017" 
                      Filter="@((SaleInfo s) => s.Date.Year == 2017)" 
                      SummaryMethod="Enumerable.Sum" 
                      ArgumentField="@(s => s.City)"
                      ValueField="@(s => s.Amount)" />
    <DxChartBarSeries Name="2018" 
                      Filter="@((SaleInfo s) => s.Date.Year == 2018)" 
                      SummaryMethod="Enumerable.Sum" 
                      ArgumentField="@(s => s.City)"
                      ValueField="@(s => s.Amount)" />
    <DxChartLineSeries Name="2019" 
                       Filter="@((SaleInfo s) => s.Date.Year == 2019)" 
                       SummaryMethod="Enumerable.Sum" 
                       ArgumentField="@(s => s.City)"
                       ValueField="@(s => s.Amount)" />
</DxChart>

Run Demo: Charts - Tooltip Customization

Grid Lines

The DxChartAxisGridLines object specifies Chart grid lines. To show/hide grid lines, use this axis’s Visible property.

The code below sets the argument axis’s Visible property to true to show vertical grid lines in the Chart component.

<DxChart Data="@forecasts">
    <DxChartBarSeries ArgumentField="@((WeatherForecast i) => i.Date)"
                      ValueField="@((WeatherForecast i) => i.Precipitation)"
                      Name="Precipitation">
        <DxChartSeriesLabel Visible="true">
            <DxChartSeriesLabelConnector Visible="true" Width="2" />
        </DxChartSeriesLabel>
    </DxChartBarSeries>
    <DxChartLineSeries ArgumentField="@((WeatherForecast i) => i.Date)"
                       ValueField="@((WeatherForecast i) => i.TemperatureC)"
                       Name="Temperature">
    </DxChartLineSeries>
    <DxChartArgumentAxis>
        <DxChartAxisGridLines Visible="true" />
    </DxChartArgumentAxis>
    @* ... *@
</DxChart>

Zoom and Pan

Users can zoom and pan the chart with the mouse wheel or touch gestures. To enable zoom/pan, add a DxChartZoomAndPanSettings object and specify its ArgumentAxisZoomAndPanMode and ValueAxisZoomAndPanMode properties. To disable the mouse wheel or touch gestures, use the AllowMouseWheel / AllowTouchGestures properties.

The DxChart component also allows users to select a specific chart area for zooming. To enable this functionality, set the AllowDragToZoom property to true. To pan the chart in this case, users should drag the mouse pressing the key specified by the PanKey property (the default key is Shift). To customize the drag box appearance, use a DxChartZoomAndPanDragBoxStyle object.

Run Demo: Chart - Zoom Selected Area

You can also add a scrollbar that allows users to pan the chart along the argument axis. To do this, add a DxChartScrollBarSettings object and set its ArgumentAxisScrollBarVisible property to true. Use the ArgumentAxisScrollBarPosition property to specify the scrollbar’s position.

Razor

@using Chart.Data

<DxChart Data="@SalesData">
    <DxChartLineSeries Name="2017"
                        Filter="@((SaleInfo s) => s.Date.Year == 2017)"
                        ArgumentField="@(s => s.Date)"
                        ValueField="@(s => s.Amount)">
        <DxChartAggregationSettings Enabled="true" Method="ChartAggregationMethod.Sum" />
    </DxChartLineSeries>
    <DxChartZoomAndPanSettings ArgumentAxisZoomAndPanMode="ChartAxisZoomAndPanMode.Both"
                               ValueAxisZoomAndPanMode="ChartAxisZoomAndPanMode.Pan" />
    <DxChartScrollBarSettings ArgumentAxisScrollBarVisible="true"
                              ArgumentAxisScrollBarPosition="ChartScrollBarPosition.Top" />
</DxChart>

@code {
    IEnumerable<SaleInfo> SalesData;

    protected override async Task OnInitializedAsync() {
        SalesData = await Sales.GetSalesAsync();
    }
}

SaleInfo

using System;

public class SaleInfo {
    public int OrderId { get; set; }
    public string Region { get; set; }
    public string Country { get; set; }
    public string City { get; set; }
    public int Amount { get; set; }
    public DateTime Date { get; set; }
}

Sales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public class Sales {
    static IList<SaleInfo> dataSource;
    static Sales() {
        CreateDataSource();
    }

    public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
        return Task.FromResult(dataSource.AsQueryable());
    }

    static void CreateDataSource() {
        dataSource = new List<SaleInfo> {
        new SaleInfo {
                OrderId = 10248,
                Region = "North America",
                Country = "United States",
                City = "New York",
                Amount = 1740,
                Date = DateTime.Parse("2017/01/06")
            },
            new SaleInfo {
                OrderId = 10249,
                Region = "North America",
                Country = "United States",
                City = "Los Angeles",
                Amount = 850,
                Date = DateTime.Parse("2017/01/13")
            },
            new SaleInfo {
                OrderId = 10250,
                Region = "North America",
                Country = "United States",
                City = "Denver",
                Amount = 2235,
                Date = DateTime.Parse("2017/01/07")
            },
            new SaleInfo {
                OrderId = 10251,
                Region = "North America",
                Country = "Canada",
                City = "Vancouver",
                Amount = 1965,
                Date = DateTime.Parse("2017/01/03")
            },
            new SaleInfo {
                OrderId = 10252,
                Region = "North America",
                Country = "Canada",
                City = "Edmonton",
                Amount = 880,
                Date = DateTime.Parse("2017/01/10")
            },
            new SaleInfo {
                OrderId = 10253,
                Region = "South America",
                Country = "Brazil",
                City = "Rio de Janeiro",
                Amount = 5260,
                Date = DateTime.Parse("2017/01/17")
            },
            new SaleInfo {
                OrderId = 10254,
                Region = "South America",
                Country = "Argentina",
                City = "Buenos Aires",
                Amount = 2790,
                Date = DateTime.Parse("2017/01/21")
            },
            new SaleInfo {
                OrderId = 10255,
                Region = "South America",
                Country = "Paraguay",
                City = "Asuncion",
                Amount = 3140,
                Date = DateTime.Parse("2017/01/01")
            },
            new SaleInfo {
                OrderId = 10256,
                Region = "Europe",
                Country = "United Kingdom",
                City = "London",
                Amount = 6175,
                Date = DateTime.Parse("2017/01/24")
            },
            new SaleInfo {
                OrderId = 10257,
                Region = "Europe",
                Country = "Germany",
                City = "Berlin",
                Amount = 4575,
                Date = DateTime.Parse("2017/01/11")
            },
            // ...
    };
    }
}

Run Demo: Charts - Zoom and Pan

When the chart contains the large number of points, you can aggregate data to optimize performance.

Data Aggregation

The <DxChart> component can use different aggregate methods to group data and decrease the number of visible points. This feature allows you to optimize chart performance.

Data aggregation is available for the X-axis. The chart splits the X-axis into intervals, aggregates data for each interval and shows the result values as series points. When users zoom the chart, it re-aggregates data.

To enable aggregation, add a DxChartAggregationSettings object to the markup and set its Enabled property to true. To specify an aggregation method, use the Method property (the default method is Auto).

Index.razor

<DxChart T="BargainDataPoint"
            Data="@UsdJpyData"
            @key="@Params.ThemeName"
            CssClass="w-100">
    <DxChartLegend Position="RelativePosition.Inside"
                    VerticalAlignment="VerticalEdge.Top"
                    HorizontalAlignment="HorizontalAlignment.Right" />
    <DxChartLineSeries T="BargainDataPoint"
                        TArgument="DateTime"
                        TValue="double"
                        ArgumentField="i => i.DateTimeStamp"
                        ValueField="i => i.Price"
                        Name="USDJPY">
        <DxChartSeriesPoint Visible="false" />
        <DxChartAggregationSettings Enabled="true" 
                                    Method="ChartAggregationMethod.Average" />
    </DxChartLineSeries>
    <DxChartArgumentAxis>
        <DxChartAxisRange StartValue="new DateTime(2020, 01, 01)"
                            EndValue="new DateTime(2021, 01, 29)" />
    </DxChartArgumentAxis>
    <DxChartZoomAndPanSettings ArgumentAxisZoomAndPanMode="ChartAxisZoomAndPanMode.Both" />
    <DxChartScrollBarSettings ArgumentAxisScrollBarVisible="true" 
                                ArgumentAxisScrollBarPosition="ChartScrollBarPosition.Bottom" />
    <DxChartTooltip Enabled="true" Position="RelativePosition.Outside">
        <div style="margin: 0.75rem">
            <div class="font-weight-bold">@(((DateTime)context.Point.Argument).ToString("d"))</div>
            <div>1$ = @(context.Point.Value)¥</div>
        </div>
    </DxChartTooltip>
</DxChart>

@code {
    IEnumerable<BargainDataPoint> UsdJpyData;
    @inject ICurrencyExchangeDataProvider UsdJpyDataProvider

    protected override async Task OnInitializedAsync() {
        UsdJpyData = await UsdJpyDataProvider.GetDataAsync();
    }
}

BagrainDataPoint.cs

public class BargainDataPoint {
    public DateTime DateTimeStamp { get; }
    public double Price { get; }

    public BargainDataPoint(DateTime dateTimeStamp, double price) {
        DateTimeStamp = dateTimeStamp;
        Price = price;
    }
}

Run Demo: Charts - Zoom and Pan

Note

You can also use summary methods to optimize chart performance.

Data Summaries

The Chart component can use a summary method to group data. This method calculates summaries for points with the same argument value, and the chart shows the resulting values as series points. This feature allows you to decrease the number of visible points and to optimize chart performance.

Note that the chart calculates summaries when it loads data and does not re-calculate them when users zoom the chart.

You can specify a common summary method for all chart series (DxChartCommonSeries.SummaryMethod) or an individual method for each series (DxChartSeries.SummaryMethod).

Razor

@using Chart.Data

<DxChart Data="@SalesData">
    <DxChartAreaSeries Name="2017_Max"
                        Filter="@((SaleInfo s) => s.Date.Year == 2017)"
                        ArgumentField="@(s => s.City)"
                        ValueField="@(s => s.Amount)"
                        SummaryMethod="Enumerable.Max" />
    <DxChartLineSeries Name="2017_Sum"
                        Filter="@((SaleInfo s) => s.Date.Year == 2017)"
                        ArgumentField="@(s => s.City)"
                        ValueField="@(s => s.Amount)"
                        SummaryMethod="Enumerable.Sum" />
    <DxChartLegend Position="RelativePosition.Outside" HorizontalAlignment="HorizontalAlignment.Right" />
</DxChart>

@code {
    IEnumerable<SaleInfo> SalesData;

    protected override async Task OnInitializedAsync() {
        SalesData = await Sales.GetSalesAsync();
    }
}

SaleInfo

using System;

public class SaleInfo {
    public int OrderId { get; set; }
    public string Region { get; set; }
    public string Country { get; set; }
    public string City { get; set; }
    public int Amount { get; set; }
    public DateTime Date { get; set; }
}

Sales

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

public class Sales {
    static IList<SaleInfo> dataSource;
    static Sales() {
        CreateDataSource();
    }

    public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
        return Task.FromResult(dataSource.AsQueryable());
    }

    static void CreateDataSource() {
        dataSource = new List<SaleInfo> {
        new SaleInfo {
                OrderId = 10248,
                Region = "North America",
                Country = "United States",
                City = "New York",
                Amount = 1740,
                Date = DateTime.Parse("2017/01/06")
            },
            new SaleInfo {
                OrderId = 10249,
                Region = "North America",
                Country = "United States",
                City = "Los Angeles",
                Amount = 850,
                Date = DateTime.Parse("2017/01/13")
            },
            new SaleInfo {
                OrderId = 10250,
                Region = "North America",
                Country = "United States",
                City = "Denver",
                Amount = 2235,
                Date = DateTime.Parse("2017/01/07")
            },
            new SaleInfo {
                OrderId = 10251,
                Region = "North America",
                Country = "Canada",
                City = "Vancouver",
                Amount = 1965,
                Date = DateTime.Parse("2017/01/03")
            },
            new SaleInfo {
                OrderId = 10252,
                Region = "North America",
                Country = "Canada",
                City = "Edmonton",
                Amount = 880,
                Date = DateTime.Parse("2017/01/10")
            },
            new SaleInfo {
                OrderId = 10253,
                Region = "South America",
                Country = "Brazil",
                City = "Rio de Janeiro",
                Amount = 5260,
                Date = DateTime.Parse("2017/01/17")
            },
            new SaleInfo {
                OrderId = 10254,
                Region = "South America",
                Country = "Argentina",
                City = "Buenos Aires",
                Amount = 2790,
                Date = DateTime.Parse("2017/01/21")
            },
            new SaleInfo {
                OrderId = 10255,
                Region = "South America",
                Country = "Paraguay",
                City = "Asuncion",
                Amount = 3140,
                Date = DateTime.Parse("2017/01/01")
            },
            new SaleInfo {
                OrderId = 10256,
                Region = "Europe",
                Country = "United Kingdom",
                City = "London",
                Amount = 6175,
                Date = DateTime.Parse("2017/01/24")
            },
            new SaleInfo {
                OrderId = 10257,
                Region = "Europe",
                Country = "Germany",
                City = "Berlin",
                Amount = 4575,
                Date = DateTime.Parse("2017/01/11")
            },
            // ...
    };
    }
}

Note

You can also use aggregation methods to optimize chart performance.

Multiple Panes

The <DxChart> component allows you to create charts with multiple panes under each other. A pane (DxChartPane) can display one or more series and can share its argument axis with other panes. To specify the pane where a series is displayed, use the series Pane property. You can also use the DefaultPane property to specify the pane that displays all axes and series with unspecified Pane property.

You can specify the pane Height in pixels or percentages.

<DxChart Data="@SalesData" Height="500px">
    <DxChartTitle Text="Sales amount" />
    <DxChartLegend Position="RelativePosition.Outside" VerticalAlignment="VerticalEdge.Bottom" />
    <DxChartPane Name="Pane1" Height="60%" />
    <DxChartPane Name="Pane2" />
    <DxChartBarSeries Name="2018"
                      Filter="@((SaleInfo s) => s.Date.Year == 2018)"
                      SummaryMethod="Enumerable.Sum"
                      Pane="Pane1"
                      ArgumentField="@(s => s.City)"
                      ValueField="@(s => s.Amount)" />
    <DxChartBarSeries Name="2019"
                      Filter="@((SaleInfo s) => s.Date.Year == 2019)"
                      SummaryMethod="Enumerable.Sum"
                      Pane="Pane2"
                      ArgumentField="@(s => s.City)"
                      ValueField="@(s => s.Amount)" />
</DxChart>

Run Demo: Charts - Multiple Panes Customization

Selection

The <DxChart> component allows you to select series and points. To enable series and point selection at the chart level, specify the chart’s SeriesSelectionMode and PointSelectionMode properties. You can choose between the following modes: None, Single, and Multiple.

Point Selection

You can define how discrete series points (for example, bars) and continuous series point markers (line and area series point markers) react on selection. The Chart component ships with the following selection modes: None, Point, AllPoints, and AllPointsForArgument. Use the following properties to select one of the selection modes:

• BarSeriesBase.SelectionMode
• BubbleSeries.SelectionMode
• FinancialSeriesBase.SelectionMode
• RangeAreaSeries.SelectionMode
• RangeBarSeries.SelectionMode
• ScatterSeries.SelectionMode
• DxChartSeriesPoint.SelectionMode (for continuous series)

Series Selection

You can allow a user to select an entire continuous series (for example, lines and areas). In this case, a user should click a line or an area segment. The following selection modes are available: None, Series, and SeriesAndAllPoints. To enable a desired selection mode, use the properties below:

• LineSeriesBase.SelectionMode
• AreaSeriesBase.SelectionMode

Track Selected Item Changes

Handle the DxChart.SelectionChanged event to respond to user selection.

Reset Selection

Call the DxChartBase.ClearSelectionAsync method to deselect all selected series and points.

Size

Use the chart’s Width and Height properties to change the component’s size. You can also use the RedrawOnResize property to specify whether to redraw the chart when its container size changes.

<DxChart Data="@forecasts" Width="800px" Height="400px">
    <DxChartBarSeries ArgumentField="@((WeatherForecast i) => i.Date)"
                      ValueField="@((WeatherForecast i) => i.Precipitation)"
                      Name="Precipitation">
    </DxChartBarSeries>
    <DxChartBarSeries ArgumentField="@((WeatherForecast i) => i.Date)"
                      ValueField="@((WeatherForecast i) => i.TemperatureC)"
                      Name="Temperature">
    </DxChartBarSeries>
</DxChart>

Appearance Customization

Use the chart’s CssClass property to customize the chart’s appearance. The following snippet changes the chart’s background color and font size:

<style>
    .my-style {
        background-color: lavender;
        font-size: 16px;
    }
</style>

<DxChart Data="@SalesData" CssClass="my-style">
    <DxChartCommonSeries NameField="@((SaleInfo s) => s.Date.Year)"
                         ArgumentField="@(s => s.City)"
                         ValueField="@(s => s.Amount)"
                         SummaryMethod="Enumerable.Sum"
                         SeriesType="BarSeriesType.Value">
    </DxChartCommonSeries>
    <DxChartLegend Position="RelativePosition.Outside" HorizontalAlignment="HorizontalAlignment.Right" />
</DxChart>

You can also apply CSS styles to chart elements:

• DxChartLegend.CssClass
• DxChartAxisTitle.CssClass
• DxChartTitle.CssClass
• DxChartSubTitle.CssClass

For more information, refer to the following help topic: CSS Classes.

Font Customization

Use the DxChartFont object to customize fonts for DxChartAxisTitle, DxChartAxisLabel, DxChartSeriesLabel, or DxChartConstantLineLabel.

The following properties are available:

• DxChartFont.Color
• DxChartFont.Family
• DxChartFont.Opacity
• DxChartFont.Size
• DxChartFont.Weight

The code snippet below customizes font settings of a series label:

Razor

<DxChart Data="@WeatherForecasts"
         CustomizeSeriesPoint="@PreparePointLabel"
         Width="100%">
    <DxChartTitle Text="Annual Weather in New York" />
    <DxChartLineSeries SummaryMethod="@(i => i.Average())"
                       ValueField="@((DetailedWeatherSummary i) => i.AverageTemperatureF)"
                       ArgumentField="@(i => new DateTime(2000, i.Date.Month, 1))"
                       Name="Temperature, F"
                       Filter="@((DetailedWeatherSummary  i) => i.City == "NEW YORK")">
        <DxChartSeriesLabel Position="RelativePosition.Outside"
                            FormatPattern="{argument:MMMM}: {value:#.##} °F">
            <DxChartSeriesLabelConnector Visible="true"
                                         Width="3" />
            <DxChartFont Size="14" Weight="600" />
        </DxChartSeriesLabel>
    </DxChartLineSeries>
    <DxChartLegend Visible="false" />
    <DxChartValueAxis>
        <DxChartAxisTitle Text="Temperature, °F" />
    </DxChartValueAxis>
    <DxChartArgumentAxis>
        <DxChartAxisLabel Format="ChartElementFormat.Month" />
    </DxChartArgumentAxis>
</DxChart>

@code {
    IEnumerable<DetailedWeatherSummary> WeatherForecasts;

    protected override async Task OnInitializedAsync() {
        WeatherForecasts = await WeatherSummaryDataProvider.GetDataAsync();
    }

    protected void PreparePointLabel(ChartSeriesPointCustomizationSettings pointSettings) {
        double value = (double)pointSettings.Point.Value;
        if (value > 50 && value < 70)
            pointSettings.PointLabel.Visible = true;
    }
}

Run Demo: Series Lable Customization

Visualize Pivot Grid Data

You can link <DxChart> to the DxPivotGrid<T> component as follows:

1. Create a method that asynchronously loads data from an IEnumerable<T> data source (Sales.Load() in this example).
2. Create a DxPivotGridDataProvider<T> object based on the created method.
3. Bind the Chart to the provider object. Use the ChartDataSource property.
4. Bind the Pivot Grid to the provider object. Use the PivotGridDataSource property.

<DxChart Data="@(PivotGridDataProvider.ChartDataSource)">
    <DxChartCommonSeries NameField="@((IChartDataItem s) => s.SeriesName)"
                         ArgumentField="@(s => s.Argument)"
                         ValueField="@(s => s.Value)"
                         SeriesType="ChartSeriesType.Bar" />
</DxChart>

<DxPivotGrid Data="@(PivotGridDataProvider.PivotGridDataSource)">
    <DxPivotGridField Field="@nameof(SaleInfo.Region)" SortOrder="PivotGridSortOrder.Ascending" 
        Area="PivotGridFieldArea.Row"></DxPivotGridField>
    <DxPivotGridField Field="@nameof(SaleInfo.Country)" Area="PivotGridFieldArea.Row"></DxPivotGridField>
    <DxPivotGridField Field="@nameof(SaleInfo.City)" Area="PivotGridFieldArea.Row"></DxPivotGridField>
    <DxPivotGridField Field="@nameof(SaleInfo.Date)" GroupInterval="PivotGridGroupInterval.Year" 
        Area="PivotGridFieldArea.Column" Caption="Year"> </DxPivotGridField>
    <DxPivotGridField Field="@nameof(SaleInfo.OrderId)" Caption="Count" Area="PivotGridFieldArea.Data" 
        SummaryType="PivotGridSummaryType.Count"> </DxPivotGridField>
</DxPivotGrid>

@code {
    DxPivotGridDataProvider<SaleInfo> PivotGridDataProvider = DxPivotGridDataProvider<SaleInfo>.Create(Sales.Load());
}

The Chart shows data from the Pivot Grid’s lowest expanded level. The Chart is updated when a user expands or collapses rows/columns in the Pivot Grid.

Run Demo: Pivot Grid - Chart Integration

Troubleshooting

If a Blazor application throws unexpected exceptions, refer to the following help topic: Troubleshooting.

Implements

IHandleEvent

IHandleAfterRender

IAsyncDisposable

IComponent

Inheritance

Show 11 items

Object

ComponentBase

DevExpress.Blazor.Base.DxAsyncDisposableComponent

DevExpress.Blazor.Base.DxDecoratedComponent

DxComponentBase

DxComponentBase<DevExpress.Blazor.Internal.JSInterop.ChartsJSInteropProxyBase>

DxControlComponent<DevExpress.Blazor.Internal.JSInterop.ChartsJSInteropProxyBase>

DxControlComponent<DevExpress.Blazor.Internal.JSInterop.ChartsJSInteropProxyBase, DevExpress.Blazor.Internal.IChartModel>

DxChartBase

DevExpress.Blazor.DxChart

DxChart<T>