RichEditDocumentServerExtensions.ExportToPdfAsync(RichEditDocumentServer, Stream, PdfExportOptions, CancellationToken) Method

Asynchronously exports the document to the specified stream with the specified options in PDF format.

Namespace: DevExpress.XtraRichEdit

Assembly: DevExpress.Docs.v24.1.dll

NuGet Package: DevExpress.Document.Processor

Declaration

C#

public static Task ExportToPdfAsync(
    this RichEditDocumentServer self,
    Stream stream,
    PdfExportOptions pdfExportOptions,
    CancellationToken cancellationToken
)

VB.NET

<ExtensionAttribute>
Public Shared Function ExportToPdfAsync(
    self As RichEditDocumentServer,
    stream As Stream,
    pdfExportOptions As PdfExportOptions,
    cancellationToken As CancellationToken
) As Task

Parameters

Name	Type	Description
self	RichEditDocumentServer	The current RichEditDocumentServer instance.
stream	Stream	A stream to which the document is exported.
pdfExportOptions	PdfExportOptions	A PdfExportOptions instance that contains PDF export options.
cancellationToken	CancellationToken	A CancellationToken object used to trace requests to cancel an operation.

Returns

Type	Description
Task	An asynchronous export operation.

Remarks

Important

The RichEditDocumentServerExtensions class is defined in the DevExpress.Docs.v24.1.dll assembly. Add this assembly to your project to use the RichEditDocumentServerExtensions members. You need a license for the DevExpress Office File API Subscription or DevExpress Universal Subscription to use this library in production code.

For information on PDF Export features and limitations, refer to the following help topic: Export to PDF.

If an application is hosted on Microsoft Azure, set the AzureCompatibility.Enable property to true on application startup.

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).

The code sample below asynchronously exports a document to the PDF format:

C#

private async void ConvertDocx2PdfWithCancellation()
{
  //10 second limit
  using (CancellationTokenSource source = new CancellationTokenSource(10000))
  {
    using (RichEditDocumentServer wordProcessor = new RichEditDocumentServer())
      {
          try
          {
              await wordProcessor.LoadDocumentAsync("Document.docx", source.Token);

            PdfExportOptions exportOptions = new PdfExportOptions();
            exportOptions.ConvertImagesToJpeg = false;
            exportOptions.DocumentOptions.Application = "Office File API";

              await wordProcessor.ExportToPdfAsync(new FileStream("Documents\SavedDocument.pdf", FileMode.Create, FileAccess.ReadWrite), exportOptions, source.Token);
          }
          catch (OperationCanceledException)
          {
              // Your code to handle cancellation
          }
      }
  }
}

VB.NET

Private Async Sub ConvertDocx2PdfWithCancellation()
    Using source As CancellationTokenSource = New CancellationTokenSource(10000)

        Using wordProcessor As RichEditDocumentServer = New RichEditDocumentServer()

            Try
                Await wordProcessor.LoadDocumentAsync("Document.docx", source.Token)
                Await wordProcessor.ExportToPdfAsync(New FileStream("Documents\SavedDocument.pdf", FileMode.Create, FileAccess.ReadWrite), exportOptions, source.Token)
            Catch __unusedOperationCanceledException1__ As OperationCanceledException
            ' Your code to handle cancellation
            End Try
        End Using
    End Using
End Sub