TreeView.NodeMouseDoubleClick Event

Occurs when the user double-clicks a TreeNode with the mouse.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

Public Event NodeMouseDoubleClick As TreeNodeMouseClickEventHandler
Dim instance As TreeView
Dim handler As TreeNodeMouseClickEventHandler

AddHandler instance.NodeMouseDoubleClick, handler

/** @event */
public void add_NodeMouseDoubleClick (TreeNodeMouseClickEventHandler value)

/** @event */
public void remove_NodeMouseDoubleClick (TreeNodeMouseClickEventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

This event occurs when the user double-clicks any portion of a tree node with the mouse, including the plus sign (+) or minus sign (-) that indicates whether the node is collapsed or expanded.

For more information about handling events, see Consuming Events.

The following code example demonstrates how to handle the NodeMouseDoubleClick event and how to use the TreeNodeMouseClickEventArgs. To run this example, paste the code into a Windows Form that contains a TreeView named treeView1. Populate treeView1 with the names of files located in the c:\ directory of the system the sample is running on, and associate the NodeMouseDoubleClick event of treeView1 with the treeView1_NodeMouseDoubleClick method in this example. This example requires that the user has administrator privileges on the machine running the example.

' If a node is double-clicked, open the file indicated by the TreeNode.
Sub treeView1_NodeMouseDoubleClick(ByVal sender As Object, _
    ByVal e As TreeNodeMouseClickEventArgs) _
    Handles treeView1.NodeMouseDoubleClick

        ' Look for a file extension, and open the file.
        If e.Node.Text.Contains(".") Then
            System.Diagnostics.Process.Start("c:\" + e.Node.Text)
        End If
        ' If the file is not found, handle the exception and inform the user.
        MessageBox.Show("File not found.")
    End Try

End Sub 'treeView1_NodeMouseDoubleClick

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0