IChartSeriesPointImage.Url Property

Specifies the image URL.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v25.1.dll

NuGet Package: DevExpress.Blazor

Declaration

string Url { get; set; }

Property Value

Type	Description
String	The image URL.

Remarks

A Chart point’s image URL is specified by the Url property. You can override this value for individual points. For this purpose, handle the CustomizeSeriesPoint event and use the PointAppearance.Image.Url property to set the new image.

The following example illustrates how to:

• use the DxChartSeriesPointImage component to specify the image size common for all points;
• handle the CustomizeSeriesPoint event and use the PointAppearance.Image property to assign images to individual points.

Point images are specified based on CloudCover field value that comes from the chart’s data source. Images with the corresponding names are stored in the wwwroot/images folder.

<DxChart Data="@WeatherForecasts" CustomizeSeriesPoint="@PreparePointImage">
    <DxChartLineSeries SummaryMethod="@(i => (int)i.Average())"
                       ValueField="@((WeatherForecast i) => i.TemperatureF)"
                       ArgumentField="@(i => i.Date.Date)"
                       Name="Temperature, F">
        <DxChartSeriesPoint>
            <DxChartSeriesPointImage Width="50" Height="50" />
        </DxChartSeriesPoint>
    </DxChartLineSeries>
    <DxChartLegend Position="RelativePosition.Outside" />
</DxChart>

@code {
    WeatherForecast[] WeatherForecasts;
    ...
    protected void PreparePointImage(ChartSeriesPointCustomizationSettings pointSettings) {
        IEnumerable<WeatherForecast> dataItems = pointSettings.Point.DataItems.Cast<WeatherForecast>();
        var weatherType = dataItems.GroupBy(x => x.CloudCover).OrderByDescending(x => x.Count()).First().Key;
        pointSettings.PointAppearance.Image.Url = $"images/{weatherType}.png";
    }
}

Run Demo: Charts - Series Point Image