getting selectednode in a treeview

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hello sir
when m using the code,its showing Object reference not set to an instance of an object.actually m using treeview which showing data from the xml.

Posted 4-Nov-11 0:04am

mama24

Updated 4-Nov-11 1:05am

v3

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BillWoodruff · Answer 1 · 2011-11-04T00:42:00

You are retrieving the SelectedItem property from 'treeviewitem' instead of the TreeView itself. I'm surprised this doesn't throw a compile error.

Try this:

XML

private void treeView1_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
    TreeViewItem theSelectedItem = treeView1.SelectedItem as TreeViewItem;

    MessageBox.Show(theSelectedItem.ToString());
}