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• Using Controls (13)

• How do I make the TreeView scroll when the user drags an item to the top or bottom?

  When you drag an item within the TreeView, you can handle the DragOver event for a drag-drop. If you want to drag-drop into a spot that's not currently visible, you can scroll the TreeView by handling the DragOver event: [C#] private void treeView1_DragOver...

• How do I display CheckBoxes in the nodes of a TreeView?

  Set the TreeView.CheckBoxes property to true. Contributed from George Shepherd's Windows Forms FAQ

• How do I enable support for selecting a node in a TreeView when it is right-clicked?

  Handle the TreeView's MouseDown event, and if it is the right-click, then explicitly set focus to the node under the click. private void treeView1_MouseDown( object sender, MouseEventArgs e ) { if ( e.Button == MouseButtons.Right ) treeView1.SelectedNode...

• How do I process the newly selected node in a TreeView when handling the Click event?

  When I get the SelectedNode in the TreeView's Click event, it is the previous selection. How do I get the newly selected node? Use the AfterSelect event instead of the Click event. The Click event is inherited from Control.Click and occurs before...

• How do I create a tooltip that varies by node in a TreeView?

  Try using a MouseMove event handler and checking to see if you have moved to a new node, and if so, set a new tiptext. [C#] private int oldNodeIndex = -1; private ToolTip toolTip1; private void Form1_Load( object sender, EventArgs e ) { toolTip1 = new...

• How do I determine the level of a node in a TreeView?

  [C#] public int NodeLevel( TreeNode node ) { int level = 0; while ( (node = node.Parent) != null ) ++level; return level; } [Visual Basic] Public Sub NodateLevel(ByVal node as TreeNode) As Integer Dim level as Integer = 0 While Not node Is Nothing node...

• How do I clone or copy all the nodes from one TreeView control to another?

  The following code snippet demonstrates how you can clone or copy all the nodes in TreeView1 to TreeView2 by clicking on Button1. private void IterateTreeNodes( TreeNode originalNode, TreeNode rootNode ) { foreach ( TreeNode childNode in originalNode...

• How do I programmatically select a node in a TreeView control?

  // Select the first node treeView1.SelectedNode = treeView1.Nodes[0]; Contributed from George Shepherd's Windows Forms FAQ

• How do I display a ContextMenu when the user right-clicks on a node in a TreeView control?

  You can display a context menu when a user right-clicks on a node by handling the TreeView's MouseUp event as shown below: [C#] private void treeView1_MouseUp( object sender, MouseEventArgs e ) { if ( e.Button == MouseButtons.Right ) { Point clickPoint...

• How do I ensure that a node is selected in a TreeView when the user clicks along the line of a node?

  A click event will be fired but a node will not be selected when the user clicks to the right of a node. This code snippets show how you can ensure that a node is selected in this scenario: private void treeView1_Click( object sender, EventArgs e ) {...

• How do I support drag and drop between two TreeView controls?

  Here are some VB.Net code snippets to handle the DragEnter, ItemDrag and DragDrop events that provide a solution to this problem. You can get C# code in this sample, TreeViewDnD . Here is some sample handlers. private void treeView2_DragDrop( object sender...

• How do I support selecting multiple nodes in a TreeView control?

  The Treeview control does not support multiple selections but here is sample which demonstrates how this feature can be implemented. Another sample is available at C# .NET TreeView with multiple selection at arsdesign.com . Contributed from George Shepherd's...

• How do I populate a TreeView Control with XML data?

  The following articles on MSDN give you step by step instructions on how you can populate a TreeView Control with data from an XML document. How To Populate a TreeView Control with XML Data in Visual Basic .NET (Article ID: 308063) HOW TO: Populate a...