Windows Forms FAQ resources

24. Windows Forms TreeView

You can display a context menu when a user right-clicks on a node by listening to the TreeView's MouseUp event as shown below:

[C#]

private void treeView1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)

{

if(e.Button == MouseButtons.Right)

{

Point ClickPoint = new Point(e.X,e.Y);

TreeNode ClickNode = treeView1.GetNodeAt(ClickPoint);

if(ClickNode == null) return;

// Convert from Tree coordinates to Screen coordinates

Point ScreenPoint = treeView1.PointToScreen(ClickPoint);

// Convert from Screen coordinates to Formc coordinates

Point FormPoint = this.PointToClient(ScreenPoint);

// Show context menu

contextmenu.MenuItems.Clear();

contextmenu.MenuItems.Add("Item1");

contextmenu.MenuItems.Add("Item2");

contextmenu.Show(this,FormPoint);

}

[VB.NET]

Private Sub treeView1_MouseUp(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

If e.Button = MouseButtons.Right Then

Dim ClickPoint As Point = New Point(e.X,e.Y)

Dim ClickNode As TreeNode = treeView1.GetNodeAt(ClickPoint)

If ClickNode Is Nothing Then

Return

End If

' Convert from Tree coordinates to Screen coordinates

Dim ScreenPoint As Point = treeView1.PointToScreen(ClickPoint)

' Convert from Screen coordinates to Formc coordinates

Dim FormPoint As Point = Me.PointToClient(ScreenPoint)

' Show context menu

contextmenu.MenuItems.Clear()

contextmenu.MenuItems.Add("Item1")

contextmenu.MenuItems.Add("Item2")

contextmenu.Show(this,FormPoint)

End If

End Sub