Asynchronous Loading

For better performance you can have the C1PdfViewer control load documents in the background asynchronously. Using the .NET await keyword, you can easily call asynchronous methods. To open a file selected by the user asynchronously, complete the following code:

Note: In order to use the ‘await’ keyword, the event or method in which the call is made from must be marked as asynchronous by using the ‘async’ keyword.

C#	Copy Code
FileOpenPicker openPicker = new FileOpenPicker(); openPicker.FileTypeFilter.Add(".pdf"); StorageFile file = await openPicker.PickSingleFileAsync(); if (file != null) { Stream stream = await file.OpenStreamForReadAsync(); await pdfViewer.LoadDocumentAsync(stream); }

Copy Code

FileOpenPicker openPicker = new FileOpenPicker();
openPicker.FileTypeFilter.Add(".pdf");
StorageFile file = await openPicker.PickSingleFileAsync();
if (file != null)
{
  Stream stream = await file.OpenStreamForReadAsync();
  await pdfViewer.LoadDocumentAsync(stream);
}

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