DxPieChartAnnotation Class

Defines a piechart annotation.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.1.dll

Declaration

public class DxPieChartAnnotation :
    DxChartAnnotationBase<PieChartAnnotationModel>

Remarks

Annotations are comments that contain information about chart content. The DxPieChart<T> component supports text and image annotations. You can anchor annotations to chart elements (series points) or position annotations based on pixel coordinates.

To create an annotation, follow the steps below:

1. Add a DxPieChartAnnotation object to the chart markup.

2. Specify the annotation type and location.

3. Optional. Customize the annotation size and appearance and configure tooltips.

<DxPieChart Data="@SalesData"
            T="SaleInfo">
    <DxPieChartAnnotation Text="Asia"
                          Argument="@("Asia")"
                          Series="Region Sales"
                          Opacity="1">
        <DxChartAnnotationBorder Color="#FFC107" Width="2" CornerRadius="4" />
    </DxPieChartAnnotation>
    <DxPieChartAnnotation Text="Tokyo"
                          Argument="@("Tokyo")"
                          Series="City Sales"
                          Location="PieChartAnnotationLocation.Edge"
                          Opacity="1">
        <DxChartAnnotationBorder Color="#FFC107" Width="2" CornerRadius="4" />
    </DxPieChartAnnotation>
    <DxPieChartAnnotation Type="ChartAnnotationType.Image"
                          Argument="@("New York")"
                          Series="City Sales"
                          Location="PieChartAnnotationLocation.Edge"
                          Opacity="1">
        <DxChartAnnotationImage Url="https://cdn-icons-png.flaticon.com/512/618/618848.png" />
        <DxChartAnnotationBorder Color="#FFC107" Width="2" CornerRadius="4" />
    </DxPieChartAnnotation>
    <DxPieChartSeries T="SaleInfo"
                      TArgument="string"
                      TValue="double"
                      ValueField="si => si.Amount"
                      ArgumentField="si => si.Region"
                      SummaryMethod="Enumerable.Sum"
                      Name="Region Sales">
        @* ... *@
    </DxPieChartSeries>
    <DxPieChartSeries T="SaleInfo"
                      TArgument="string"
                      TValue="double"
                      ValueField="si => si.Amount"
                      ArgumentField="si => si.City"
                      SummaryMethod="Enumerable.Sum"
                      Name="City Sales">
        @* ... *@
    </DxPieChartSeries>
    <DxChartTitle Text="Top Sales Worldwide">
        <DxChartSubTitle Text="USD" />
    </DxChartTitle>
</DxPieChart>

Refer to the DxChartAnnotationBase topic for more information about chart annotations.

Implements

IComponent

IHandleEvent

IHandleAfterRender

IDisposable

Inheritance

Object

ComponentBase

DxSettingsComponent<DevExpress.Blazor.Internal.PieChartAnnotationModel>

DxComplexSettingsComponent<DxChartAnnotationBase<DevExpress.Blazor.Internal.PieChartAnnotationModel>, DevExpress.Blazor.Internal.PieChartAnnotationModel>

DxChartAnnotationBase<DevExpress.Blazor.Internal.PieChartAnnotationModel>

DxPieChartAnnotation