VisualTreeHelper.GetChildrenCount(obj) in C#

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VS2008

i am using this VisualTreeHelper.GetChildrenCount(obj)method and passing list box as object parameter..when that list box is in first tabitem of tabcontrol the

MIDL

System.Windows.MessageBox.Show(VisualTreeHelper.GetChildrenCount(obj).ToString());

Message box show output is 1 and

when that list box in second tab item then it show output in message box is 0 why this happen ..

in actual scenario i am using project http://www.codeproject.com/KB/IP/WCFWPFChatRoot.aspx (WCF chat application) in my application where in my application there is 5 tab item and i amproviding this chat function on 2nd tab..but its connect but not switch to chatting list box control..when i put this application on first starting tab then its work fine...but switch to other tab rather than first give same error..please help me.

Posted 22-May-11 23:25pm

vishal_h

Updated 23-May-11 19:06pm

v2

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Comments

Wayne Gaylard 23-May-11 5:49am

What are you passing into the function as obj? Are you sure you are assessing the same control both times ? This function just returns an integer giving the number of visual elements contained within the original visual object. Are you sure this is what you were intending ? You need to provide more detail to get any meaningful help.

vishal_h 24-May-11 1:03am

sir i am actually using this project http://www.codeproject.com/KB/IP/WCFWPFChatRoot.aspx (WCF chat application) in my application where in my application there is 5 tab item and i amproviding this chat function on 2nd tab..but its connect but not switch to chatting list box control..when i put this application on first starting tab then its work fine...but switch to other tab rather than first give same error..please help me..

Sergey Alexandrovich Kryukov 23-May-11 9:44am

Yes, not quite clear. Show XAML as well; do you provide a template for the control?
--SA

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Abhinav S · Answer 1 · 2011-05-23T19:16:00

Solution 1

Do the tabs have names?
Once you get the list of children, you can look at the names and perform appropriate actions.

Posted 23-May-11 19:16pm

Abhinav S

Comments

vishal_h 24-May-11 1:33am

but sir i am not getting the name of tab...and when i put that application on start tab its work fine..i also try to replace window load code tab index changed event of that tab..but not work