TreeView.NodeMouseDoubleClick Event

 

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

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

Public Event NodeMouseDoubleClick As TreeNodeMouseClickEventHandler

This event occurs when the user double-clicks any part 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 Handling and Raising 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

    Try
        ' 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.
    Catch
        MessageBox.Show("File not found.")
    End Try

End Sub 'treeView1_NodeMouseDoubleClick

.NET Framework
Available since 2.0
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