RichEditDocumentServerExtensions.SaveDocumentAsync(RichEditDocumentServer, Stream, DocumentFormat, CancellationToken) Method

Asynchronously saves the document to a stream with the specified document format.

Assembly : DevExpress.Docs.v25.2.dll

NuGet Package : DevExpress.Document.Processor

Declaration

C#
VB.NET

csharp

public static Task SaveDocumentAsync(
    this RichEditDocumentServer self,
    Stream stream,
    DocumentFormat documentFormat,
    CancellationToken cancellationToken
)

<ExtensionAttribute>
Public Shared Function SaveDocumentAsync(
    self As RichEditDocumentServer,
    stream As Stream,
    documentFormat As DocumentFormat,
    cancellationToken As CancellationToken
) As Task

Parameters

Name	Type	Description
self	RichEditDocumentServer

The current RichEditDocumentServer instance.

| | stream | Stream |

The stream to which to output the document.

| | documentFormat | DocumentFormat |

The enumeration value that indicates the document format.

| | 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.v25.2.dll assembly and DevExpress.Document.Processor NuGet package. Add this assembly or package 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.

The SaveDocumentAsync method call does not automatically change the RichEditDocumentServer.Modified property value.

Handle the RichEditDocumentServer.BeforeExport event if the specified document format requires that a certain type of content should be saved as external objects. Use the HtmlDocumentExporterOptions.EmbedImages property to specify whether images are embedded in HTML code or a custom IUriProvider is used to construct src image references.

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 merges two asynchronously loaded documents and exports the result:

C#
VB.NET

csharp

private async void MergeDocuments()
{
    using (CancellationTokenSource source = new CancellationTokenSource(10000))
    {
        using (RichEditDocumentServer wordProcessor = new RichEditDocumentServer())
        using (RichEditDocumentServer wordProcessor2 = new RichEditDocumentServer())
        {
            await Task.WhenAll(new Task[]
            {
          wordProcessor.LoadDocumentAsync("Document1.docx"),
          wordProcessor2.LoadDocumentAsync("Document2.docx")
            });

            wordProcessor.Document.AppendDocumentContent(wordProcessor2.Document.Range);
            await wordProcessor.SaveDocumentAsync(new FileStream("merged.docx", FileMode.Create, FileAccess.ReadWrite), 
                DocumentFormat.Docx, source.Token);
        }
    }
}

Private Async Sub MergeDocuments()
    Using source As New CancellationTokenSource(10000)
      Using wordProcessor As New RichEditDocumentServer()
      Using wordProcessor2 As New RichEditDocumentServer()
        Await Task.WhenAll(New Task() { wordProcessor.LoadDocumentAsync("Document1.docx"), wordProcessor2.LoadDocumentAsync("Document2.docx") })

        wordProcessor.Document.AppendDocumentContent(wordProcessor2.Document.Range)
        Await wordProcessor.SaveDocumentAsync(New FileStream("merged.docx", FileMode.Create, FileAccess.ReadWrite), DocumentFormat.Docx, source.Token)
      End Using
      End Using
    End Using
  End Sub