Workbook.ExportToPdfAsync(Stream) Method

Asynchronously exports the workbook to the specified stream in PDF format.

You need a license for the DevExpress Office File API Subscription or DevExpress Universal Subscription to use this method in production code.

Namespace: DevExpress.Spreadsheet

Assembly: DevExpress.Docs.v25.2.dll

NuGet Package: DevExpress.Document.Processor

Declaration

C#

public Task ExportToPdfAsync(
    Stream stream
)

VB.NET

Public Function ExportToPdfAsync(
    stream As Stream
) As Task

Parameters

Name	Type	Description
stream	Stream	A Stream object to which the created PDF file should be sent.

Returns

Type	Description
Task	An Task object representing an asynchronous export operation.

Remarks

Important

Take into account the following when you call this method:

• The events fired by this method call may occur in a different thread than the target operation.

• The operation is not thread safe (the document should not be accessed simultaneously by different threads). Wait until the operation is completed before you continue to work with the document (for example, use the await operator).

Calculate Formulas Before Export

The default calculation mode for a Workbook is Manual. This mode implies that the Spreadsheet does not recalculate formulas before it generates a PDF document. Call the Workbook.Calculate or Workbook.CalculateFull method to calculate all formulas in the workbook before you export it to PDF.

Example

The following code snippet asynchronously loads the specified XLSX document and exports it as a PDF file:

C#

private async void ExportToPdf(object sender, RoutedEventArgs e) {
    using (Workbook workbook = new Workbook()) {
        try {
            await workbook.LoadDocumentAsync("BreakevenAnalysis.xlsx");
                using (FileStream pdfFileStream = new FileStream("Exported_Document.pdf", FileMode.Create)) {
                  await workbook.ExportToPdfAsync(pdfFileStream);
                }
        }
        catch (OperationCanceledException) {
            // Your code to handle cancellation
        }
    }
}

VB.NET

Private Async Sub ExportToPdf(ByVal sender As Object, ByVal e As RoutedEventArgs)
    Using workbook As New Workbook()
        Try
            Await workbook.LoadDocumentAsync("BreakevenAnalysis.xlsx")
            Using pdfFileStream As New FileStream("Exported_Document.pdf", FileMode.Create)
                Await workbook.ExportToPdfAsync(pdfFileStream)
            End Using
        Catch ex As OperationCanceledException
            ' Your code to handle cancellation
        End Try
    End Using
End Sub

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the ExportToPdfAsync(Stream) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

spreadsheet-document-api-create-loan-amortization-schedule-within-blazor-server-app/CS/BlazorAppSpreadsheet/Code/DocumentService.cs#L44

using var ms = new MemoryStream();
await workbook.ExportToPdfAsync(ms);
return ms.ToArray();