怎样对TreeView控件里的节点进行过滤？

[billow_chentao]

有一个树如下：
aa(根)
bb(子节点)
孙01
孙02
cc
孙01
孙02
dd
孙01
.....

当我输入过滤值“C”后，把树中BB及DD删除只留下：
aa(根结点)
cc
孙01
孙02
怎么办？？

我想从根结点开始 用instr()对节点名称进行判断，是否包含过滤值“C”
如果节点包含过滤值，保留自身及子节点，开始检查下一个。
如果节点不包含过滤值，但有子节点，开始检查子节点。
如果节点不包含过滤值，没有子节点，删除该节点。

[yanlongwuhui]

思路没问题啊，挺好的

[polarmirror]

用代码说话,楼主拿去试试
Public Class Form1
Inherits System.Windows.Forms.Form
Dim tvTemp As TreeView
#Region " Windows 窗体设计器生成的代码 "

Public Sub New()
MyBase.New()

'该调用是 Windows 窗体设计器所必需的。
InitializeComponent()

'在 InitializeComponent() 调用之后添加任何初始化

End Sub

'窗体重写 dispose 以清理组件列表。
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

'Windows 窗体设计器所必需的
Private components As System.ComponentModel.IContainer

'注意: 以下过程是 Windows 窗体设计器所必需的
'可以使用 Windows 窗体设计器修改此过程。
'不要使用代码编辑器修改它。
Friend WithEvents TreeView1 As System.Windows.Forms.TreeView
Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.TreeView1 = New System.Windows.Forms.TreeView
Me.TextBox1 = New System.Windows.Forms.TextBox
Me.SuspendLayout()
'
'TreeView1
'
Me.TreeView1.ImageIndex = -1
Me.TreeView1.Location = New System.Drawing.Point(52, 60)
Me.TreeView1.Name = "TreeView1"
Me.TreeView1.Nodes.AddRange(New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("aa", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("bb", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("孙01"), New System.Windows.Forms.TreeNode("孙02")}), New System.Windows.Forms.TreeNode("cc", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("孙01"), New System.Windows.Forms.TreeNode("孙02")}), New System.Windows.Forms.TreeNode("dd", New System.Windows.Forms.TreeNode() {New System.Windows.Forms.TreeNode("孙01")})})})
Me.TreeView1.SelectedImageIndex = -1
Me.TreeView1.Size = New System.Drawing.Size(142, 313)
Me.TreeView1.TabIndex = 0
'
'TextBox1
'
Me.TextBox1.Location = New System.Drawing.Point(56, 26)
Me.TextBox1.Name = "TextBox1"
Me.TextBox1.TabIndex = 1
Me.TextBox1.Text = ""
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
Me.ClientSize = New System.Drawing.Size(292, 451)
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.TreeView1)
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)

End Sub

#End Region

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim sValue As String = TextBox1.Text
Dim sN As TreeNode()
For Each tvSub As TreeNode In TreeView1.Nodes(0).Nodes
If Not tvSub.Text Like sValue & "*" Then
If sN Is Nothing Then
ReDim sN(0)
sN(0) = tvSub
Else
ReDim Preserve sN(sN.Length)
sN(sN.Length - 1) = tvSub
End If
End If
Next
If Not sN Is Nothing Then
For Each tvsub As TreeNode In sN
TreeView1.Nodes.Remove(tvsub)
Next
End If
End Sub
End Class

[billow_chentao]

Private Sub btnFilter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFilter.Click
Try
If txtFilter.Text = "" Then
btnFilter.Enabled = False
Exit Sub
End If
Me.F(Me.TreeView1.Nodes, txtFilter.Text)
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Private Function F(ByVal xNodes As TreeNodeCollection, ByVal str As String) As Boolean
Try
If str = "" Then Throw New System.Exception("没有指定要过滤的字符。")
If xNodes.Count = 0 Then Return False
Dim i As Integer
Dim ii As Integer
ii = 0
For i = 0 To xNodes.Count - 1
If InStr(xNodes(ii).Text, str, CompareMethod.Text) = 0 Then
If xNodes(ii).Nodes.Count = 0 Then
xNodes(ii).Remove()
Else
If F(xNodes(ii).Nodes, str) = True Then
ii = ii + 1
Else
xNodes(ii).Remove()
End If
End If
Else
ii = ii + 1
End If
Next
If ii = 0 Then
Return False
Else
Return True
End If
Catch ex As Exception
Throw New System.Exception(ex.Message, ex.InnerException)
End Try
End Function

[billow_chentao]

我写了半天都没写出来呀.