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Determining Which TreeView Node Was Clicked (Windows Forms)

Visual Studio .NET 2003

When working with the Windows Forms TreeView control, a common task is to determine which node was clicked, and respond appropriately.

To determine which TreeView node was clicked

  1. Use the EventArgs object to return a reference to the clicked node object.
  2. Determine which node was clicked by checking the TreeViewEventArgs class, which contains data related to the event.
    ' Visual Basic
    Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, _
    ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles TreeView1.AfterSelect
       ' Determine by checking the Node property of the TreeViewEventArgs.
       MessageBox.Show(e.Node.Text)
    End Sub
    
    // C#
    protected void treeView1_AfterSelect (object sender, 
    System.Windows.Forms.TreeViewEventArgs e)
    {
       // Determine by checking the Text property.
       MessageBox.Show(e.Node.Text);
    }
    
    // C++
    private:
       System::Void treeView1_AfterSelect(System::Object *  sender,
          System::Windows::Forms::TreeViewEventArgs *  e)
       {
          // Determine by checking the Text property.
          MessageBox::Show(e->Node->Text);
       }
    
    Note   As an alternative, you can use the MouseEventArgs of the MouseDown or MouseUp event to get the X and Y coordinate values of the Point where the click occurred. Then, use the TreeView control's GetNodeAt method to determine which node was clicked.

See Also

TreeView Control (Windows Forms)

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