IChartSeriesPointImage.Height Property

Specifies the image height.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v25.1.dll

NuGet Package: DevExpress.Blazor

Declaration

[DefaultValue(30)]
int Height { get; set; }

Property Value

Type	Default	Description
Int32	30	The image height in pixels.

Remarks

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

Note

The Chart component applies custom height and width settings to the <image> element, but the specified icon retains its original proportions. For <svg> icons, you can set the preserveAspectRatio attribute to none so that the graphic content matches the viewport rectangle.

The following example illustrates how to:

• use the DxChartSeriesPointImage component to specify the image size for all points;
• handle the CustomizeSeriesPoint event and use the PointAppearance.Image.Height and PointAppearance.Image.Width properties to change the image size for points whose values are greater than 75.

<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="25" Height="25" />
        </DxChartSeriesPoint>
    </DxChartLineSeries>
    <DxChartLegend Position="RelativePosition.Outside" />
</DxChart>

@code {q
    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 = $"_content/BlazorDemo/images/{weatherType}.png";

        double value = (double)pointSettings.Point.Value;
        if (value > 75) {
            pointSettings.PointAppearance.Image.Height = 50;
            pointSettings.PointAppearance.Image.Width = 50;
        }
    }
}

Run Demo: Charts - Series Point Image