本例实现双击节点，弹出对话框并显示节点信息

先对treeview1加入些数据，代码如下：

Sub Example()

Dim N As New TreeNode, I As Integer, J As Integer

For I = 0 To 3

With N.Nodes.Add((I * 15).ToString & "-" & ((I + 1) * 15 - 1).ToString)

For J = 0 To 14

.Nodes.Add((J + I * 15).ToString)

Next

End With

Next

Dim NodeToAdd As TreeNode

For I = 1 To 24

NodeToAdd = N.Clone

NodeToAdd.Text = I.ToString

TreeView1.Nodes.Add(NodeToAdd)

Next

End Sub


在Treeview1_click事件中加入如下代码：


Dim N As TreeNode = CType(sender, Windows.Forms.TreeView).SelectedNode

'//如果树节点不为0，则显示提示信息，

If N.GetNodeCount(False) = 0 Then 

'//当前节点的文本字符

Dim S As String = N.Text

'//如果字符长度为1，则在前而加0

If S.Length = 1 Then

S = S.Insert(0, "0") '//指定位置插入字符 

End If

'//上一树节点的字符加当前节点字符

S = N.Parent.Text & ":" & S 

‘//当然你还可以显示再上级节点的字符

‘//代码就变为：S=N.Parent.Parent.Text & “:” & S

MessageBox.Show("你选择的节字符是: " & S)

End If