not uncheck the child node while parent node is checked

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hi frind i have a tree view control using first time in my window application, my problem is that if the parent node the the tree view is checked then the user can not able to unckeck the the childe node if he want to uncheck the child node by compulsion uncheck the parent node of the child node first.

Thanks in advance

Rathi

Posted 3-May-11 20:15pm

Parveen Rathi

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Sunasara Imdadhusen 4-May-11 2:29am

Please provide code snippet!

Sergey Alexandrovich Kryukov 4-May-11 2:32am

Tag it! Forms, WPF, what?
What is "check"? Selection may be. Or a check box in a node?
--SA

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OriginalGriff · Answer 1 · 2011-05-04T08:15:00

Assuming you are using Winforms, handle the BeforeCheck event for the TreeView:

private void myTreeView_BeforeCheck(object sender, TreeViewCancelEventArgs e)
    {
    if (e.Node.Parent != null && e.Node.Parent.Checked && e.Node.Checked)
        {
        e.Cancel = true;
        }
    }

This forbids unchecking nodes unless the immediate parent is also unchecked.
If this is not what you are trying to achieve, it is not clear from your question, so please explain what you are trying to achieve more clearly.