Setting up a pull operation for sharing a file

Question

I'm trying to create a text file to send to the share charm. I'm using a pull operation because the process can take longer than the 200 milliseconds that is allocated to a normal sharing operation. I'm using the following code:

    private async void OnDeferredShareRequestHandler(Windows.ApplicationModel.DataTransfer.DataProviderRequest e)
    {
        Windows.ApplicationModel.DataTransfer.DataProviderDeferral Deferral = e.GetDeferral();
        try
        {
            Windows.Storage.IStorageFile TempFile = await Windows.Storage.ApplicationData.Current.TemporaryFolder.CreateFileAsync("TEMP", Windows.Storage.CreationCollisionOption.ReplaceExisting);
            await Windows.Storage.FileIO.WriteTextAsync(TempFile, "test");
            e.SetData(Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(TempFile));
        }
        catch (System.Exception exception)
        {
            ExceptionHandler(exception);
        }
        finally
        {
            Deferral.Complete();
        }
    }

But this isn't working. It throws the following error:

> An exception of type 'System.Exception' occurred in App.exe but was
> not handled in user code WinRT information: Unable to create
> StorageItems from the passed in object. Additional information: Type
> mismatch. Unable to create StorageItems from the passed in object. If
> there is a handler for this exception, the program may be safely
> continued.

What am I doing wrong? How can I fix this so that I can share the file properly?

Answer 1

Which line of code is throwing the exception? Can you post a reproduction app for testing?

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Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects and unknown namespaces.