Skip to main content
All docs
V24.2

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

DxChartAnnotationBase<T>.Opacity Property

Specifies annotation transparency.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
[DefaultValue(0.9)]
[Parameter]
public double Opacity { get; set; }

#Property Value

Type Default Description
Double 0.9

A value between 0 (transparent) and 1 (opaque).

#Remarks

The Opacity property accepts values from 0 (transparent) to 1 (opaque).

The following code snippet changes the annotation opacity:

razor
<DxChart Data="@DataSource">
    @* ... *@
    <DxChartLineSeries ValueField="@((ApplePrice i) => i.Close)"
                       ArgumentField="@((ApplePrice i) => i.Date)"
                       Name="AAPL" />
    <DxChartAnnotation Argument="new DateTime(2019, 9, 10)"
                       Series="AAPL"
                       Text="Watch Series 5"
                       Height="70"
                       Width="150"
                       Opacity="0.3">
        <DxChartFont Size="18" />
    </DxChartAnnotation>
</DxChart>

Chart - Annotation opacity

Refer to the following section for more information about annotations: Annotations in Blazor Charts.

See Also