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V24.2

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DxSparkline.ExportToAsync(String, DataExportFormat) Method

Exports sparkline data to a file in the specified format.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
public ValueTask ExportToAsync(
    string fileName,
    DataExportFormat format = DataExportFormat.Png
)

#Parameters

Name Type Description
fileName String

The name of the exported file.

#Optional Parameters

Name Type Default Description
format DataExportFormat Png

The format of the exported file.

#Returns

Type Description
ValueTask

A structure that stores an awaitable result of an asynchronous operation.

#Remarks

Call the ExportToAsync() method to export sparkline data to a file in the specified format: PNG, PDF, JPEG, or SVG.

The following code snippet displays a custom Export to PDF button that exports component data to a PDF file. The button appears after the Sparkline is completely loaded. For demo purposes, the example imitates a time-consuming operation.

Sparkline - Export Data

<DxSparkline Data="@DataSource"
             @ref=@Sparkline
             ArgumentFieldName="Month"
             ValueFieldName="VisitorCount"
             Rendered="@SparklineRendered"
             Height="50px"
             Width="200px">
</DxSparkline>

<DxButton Text="Export to PDF" Visible="@buttonVisible" Click="ExportToPdf" />

@code {
    bool buttonVisible;
    DxSparkline Sparkline;

    IEnumerable<SparklineDataPoint> DataSource = Enumerable.Empty<SparklineDataPoint>();
    protected override void OnInitialized() {
        DataSource = GenerateData();
    }

    async Task SparklineRendered() {
        await Task.Delay(2000);
        buttonVisible = true;
    }
    async Task ExportToPdf () {
        await Sparkline.ExportToAsync("Custom file", DataExportFormat.Pdf);
    }
}
See Also