Workbook.ExportToHtmlAsync(String, Worksheet, CancellationToken) Method

Asynchronously exports the specified worksheet to the specified file in HTML format.

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

Namespace: DevExpress.Spreadsheet

Assembly: DevExpress.Docs.v19.2.dll

Declaration

C#

public Task ExportToHtmlAsync(
    string fileName,
    Worksheet sheet,
    CancellationToken cancellationToken
)

VB.NET

Public Function ExportToHtmlAsync(
    fileName As String,
    sheet As Worksheet,
    cancellationToken As CancellationToken
) As Task

Parameters

Name	Type	Description
fileName	String	A String value which contains the full path (including the file name and extension) specifying where the HTML file will be created.
sheet	Worksheet	A Worksheet object to be exported to HTML.
cancellationToken	CancellationToken	A CancellationToken object used to trace the requests to cancel an operation.

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’s call may occur in a different thread than the target operation.

• The operation is not thread safe (documents should not be accessed simultaneously by different threads). Wait until the operation is completed before working with the document, i.e., use the await operator.

The code sample below asynchronously exports the first worksheet of the loaded XLSX document to HTML using the CancellationToken object:

C#

private async void ConvertXlsx2HtmlWithCancellation()
{
  using (CancellationTokenSource source = new CancellationTokenSource(10000))
  {
    using (Workbook workbook = new Workbook())
      {
          try
          {
              await workbook.LoadDocumentAsync("Document.xlsx", source.Token);
              await workbook.ExportToHtmlAsync("Result.html", 0, source.Token);
          }
          catch (OperationCanceledException)
          {
              // Your code to handle cancellation.
          }
      }
  }
}

VB.NET

Private Async Sub ConvertXlsx2HtmlWithCancellation()
    Using source As CancellationTokenSource = New CancellationTokenSource(10000)

        Using workbook As Workbook = New Workbook()

            Try
                Await workbook.LoadDocumentAsync("Document.xlsx", source.Token)
                Await workbook.ExportToHtmlAsync("Result.html", 0, source.Token)
            Catch __unusedOperationCanceledException1__ As OperationCanceledException
            ' Your code to handle cancellation.
            End Try
        End Using
    End Using
End Sub