Exception on Export Report Command

[Alexander]

Hi

We use ReportViewer for report visualization, print and export in a silverlight application.  

Sometime after we save exported file(no matter what format) the control show exception of type "IO.IO_SharingViolationFile" please see the screen attached.

We need to hide this message from end user and show him some styled popup message with user friendly text.

We tried to add try{ }catch{ } block but sometime it helps sometime now.

then we looked at control ViewModel code and discovered here the reason why we can't catch this exception 

Below is the code listing:

    private void Save()
    {
        string documentName;
        bool flag;
        RenderingResult viewerModel = base.ViewerModel.exportResult;
        if (viewerModel != null)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            saveFileDialog.DefaultExt = viewerModel.Extension;
            SaveFileDialog saveFileDialog1 = saveFileDialog;
            if (Application.Current.HasElevatedPermissions)
            {
                documentName = viewerModel.DocumentName;
            }
            else
            {
                documentName = null;
            }
            saveFileDialog1.DefaultFileName = documentName;
            saveFileDialog.Filter = ReportViewerModel.SaveExportCommandImpl.BuildSaveFileDialogFilter(base.ViewerModel.selectedExtensionInfo, viewerModel.Extension, base.ViewerModel.TextResources.AllFiles);
            saveFileDialog.FilterIndex = 1;
            SaveFileDialog saveFileDialog2 = saveFileDialog;
            bool? nullable = saveFileDialog2.ShowDialog();
            flag = (!nullable.GetValueOrDefault() ? false : nullable.HasValue);
            if (flag)
            {
                try
                {
                    Stream stream = saveFileDialog2.OpenFile();
                    using (stream)
                    {
                        byte[] documentBytes = viewerModel.DocumentBytes;
                        stream.Write(documentBytes, 0, (int)documentBytes.Length);
                    }
                }
                catch (Exception exception1)
                {
                    Exception exception = exception1;
                    MessageBox.Show(exception.Message);
                }
            }
            return;
        }
        else
        {
            throw new InvalidOperationException(base.ViewerModel.TextResources.UnableToExportError);
        }
    }

Please pay attention on this block 
  try
                {
                    Stream stream = saveFileDialog2.OpenFile();
                    using (stream)
                    {
                        byte[] documentBytes = viewerModel.DocumentBytes;
                        stream.Write(documentBytes, 0, (int)documentBytes.Length);
                    }
                }
                catch (Exception exception1)
                {
                    Exception exception = exception1;
                    MessageBox.Show(exception.Message);
                }

There is standard MessageBox shown and no exception is throw. It make impossible to work with such type of exeptions please fix it

[Elian]

Hello Alexander,

Thank your for the feedback, we will have your case in mind.
However, in that particular case if an exception is thrown from the command you won't be able to handle it and thus we have decided that the MessageBox is more appropriate than an application crash. 
 
Regards,
Elian
the Telerik team

[Alexander]

Hello,

Thank you, 
It would be helpful if you make this message customizable. Our customers want to see more meaningful and user-friendly message in this case.

Alex