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V25.1
  • DxChartFont.Opacity Property

    Specifies the font transparency of the element’s text.

    Namespace: DevExpress.Blazor

    Assembly: DevExpress.Blazor.v25.1.dll

    NuGet Package: DevExpress.Blazor

    Declaration

    [Parameter]
    public double Opacity { get; set; }

    Property Value

    Type Description
    Double

    The font opacity in the range from 0 to 1, inclusive.

    Remarks

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

    Example

    The following example changes the font opacity of a series label:

    <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 Opacity="0.7" />
            </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;
        }
    }
    

    DxChartFont - Opacity

    See Also