RichRibbonBar Error on Save

[Jeff]

Using the RichRibbonBar, I get an error any time I use the "Save" button. I don't get the error when using "Save As". This happens when using the QuickAccessToolbar or the File menu.

The error is "Object reference not set to an instance of an object." in this Sub on the line "Me.SaveDocument(button.Tag.ToString())"

Private Sub buttonSave_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim button As RadButton = TryCast(sender, RadButton)
    Me.BackstageControl.HidePopup()
    Me.SaveDocument(button.Tag.ToString())
End Sub

[George]

Hello Jeff,

Thank you for contacting us.

The exception you are seeing is due to inappropriate cast. When trying to cast the sender as a RadButton the cast fails and returns null, which causes the exception. The right cast in this situation would be to RadButtonElement. Also it's always good to check for null values if possible in order to prevent such exceptions. Please take a look at the code below.

Private Sub buttonSave_Click(sender As Object, e As EventArgs)
    Dim button As RadButtonElement = TryCast(sender, RadButtonElement)
    If button IsNot Nothing Then
        Me.BackstageControl.HidePopup()
        Me.SaveDocument(button.Tag.ToString())
    End If
End Sub

I hope this helps.
 
Regards,
George
Telerik