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V25.1
  • DxTreeList.ExportToCsvAsync(Stream, TreeListCsvExportOptions) Method

    Exports TreeList data to a stream in CSV format.

    Namespace: DevExpress.Blazor

    Assembly: DevExpress.Blazor.v25.1.dll

    NuGet Package: DevExpress.Blazor

    Declaration

    public Task ExportToCsvAsync(
        Stream stream,
        TreeListCsvExportOptions options = null
    )

    Parameters

    Name Type Description
    stream Stream

    The target stream for export.

    Optional Parameters

    Name Type Default Description
    options TreeListCsvExportOptions null

    An object that contains export options.

    Returns

    Type Description
    Task

    The task that is completed when the file is exported.

    Remarks

    Call the ExportToCsvAsync method to export data in CSV format. Note that only data cell values are exported - summaries and cell style settings are ignored.

    The method overloads allow you to write the result to a stream (current overload) or to a file downloaded to a client machine (ExportToCsvAsync(String, TreeListCsvExportOptions)). Methods accept a TreeListCsvExportOptions object as a parameter. You can use this parameter to set up export settings.

    For more information about data export in the TreeList component, refer to the following topic: Export Blazor TreeList Data to CSV.

    Run Demo: TreeList - Export

    Important

    Security Considerations

    Exported data can contain executable content. To prevent possible security vulnerabilities, set the EncodeExecutableContent property to true to enclose potentially dangerous content in quotation marks prior to exporting it to the CSV format. To learn more, see the property description.

    Example

    The following example uses a file stream to export TreeList data to the XLSX file:

    <DxButton Text="Export to CSV" Click="ExportCSV_Click" />
    
    <DxTreeList Data="TreeListData" 
                KeyFieldName="Id" 
                ParentKeyFieldName="ParentId" 
                @ref="MyTreeList">
        <Columns>
            <DxTreeListDataColumn FieldName="Name" Caption="Task" />
            <DxTreeListDataColumn FieldName="EmployeeName" />
            <DxTreeListDataColumn FieldName="StartDate" />
            <DxTreeListDataColumn FieldName="DueDate" />
        </Columns>
    </DxTreeList>
    
    @code {
        ITreeList MyTreeList { get; set; }
    
        async Task ExportCSV_Click() {
            string path = @"C:\MyProjects\MyFile.csv";
            FileStream fs = File.OpenWrite(path);
            await MyTreeList.ExportToCsvAsync(fs);
            fs.Dispose();
        }
    }
    
    See Also