Setting Tag value on Button to Canvas causes System.StackOverflowException in Silverlight 2.0 B2

08-22-2008 10:39 AM |

I have the following code inside a MouseLeftButtonUp event Handler routine inside a UserControl:

bCanvas = New Canvas
bCanvas.Tag = Me
mainCanvas.Children.Add(bCanvas)
Dim s3 As New StackPanel
s3.Orientation = Orientation.Horizontal
Canvas.SetTop(s3, 90)
Canvas.SetLeft(s3, 90)
Dim HL As New Button
Dim HLtext As New TextBlock
HLtext.Text = "Edit details"
HL.Content = HLtext
HL.Tag = bCanvas
HL.Margin = New Thickness(20, 0, 0, 0)
s3.Children.Add(HL)
bCanvas.Children.Add(s3)
bCanvas.Visibility = Windows.Visibility.Visible

Re: Setting Tag value on Button to Canvas causes System.StackOverflowException in Silverlight 2.0 B2

08-25-2008 9:01 PM |

When you get a StackOverflow exception, it almost always means that you have inadvertently caused an infinite recursive loop, through some coding error. Set a breakpoint in your code to trace how you may be causing this to happen. Your code sample is not complete, so its difficult to tell where the error may lie.

The fact that the code may run OK in WPF is not relevant. Silverlight != WPF in many cases.

Re: Setting Tag value on Button to Canvas causes System.StackOverflowException in Silverlight 2.0 B2

08-26-2008 12:11 AM |

Hello, thanks for reporting this issue. I've tested it in Beta2, and I did get a stack overflow. But when I tested it in an internal RTW build, it worked fine. So hopefully this issue has already been solved. But I can't 100% assure you at this time...

Re: Setting Tag value on Button to Canvas causes System.StackOverflowException in Silverlight 2.0 B2

08-26-2008 7:37 AM |

The StackTrace shows that it is not looping in my code, but in MS internal code only.

Since I get a Stack Overflow when I Single Step just one line of my code shows that the recursive loop is not in my code.

Re: Setting Tag value on Button to Canvas causes System.StackOverflowException in Silverlight 2.0 B2

08-26-2008 7:39 AM |

MS had better make sure that this problem is fixed before the next release of Silverlight.

Since the VSTS 2008 error messages do not give the location in my code where the problem begins, it is very difficult to find and not obvious.

RTW Build?

08-26-2008 10:00 AM |

RTW build?

I hope there will be another Beta / RC before actual release...?