VB.NET中让Textbox只能输入数字(二)

Public Class Form1
Inherits System.Windows.Forms.Form

#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 TextBox1 As System.Windows.Forms.TextBox

 1<system.diagnostics.debuggerstepthrough()> Private Sub InitializeComponent()   
 2Me.TextBox1 = New System.Windows.Forms.TextBox   
 3Me.SuspendLayout()   
 4'   
 5'TextBox1   
 6'   
 7Me.TextBox1.Location = New System.Drawing.Point(112, 96)   
 8Me.TextBox1.Name = "TextBox1"   
 9Me.TextBox1.TabIndex = 0   
10Me.TextBox1.Text = ""   
11'   
12'Form1   
13'   
14Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)   
15Me.ClientSize = New System.Drawing.Size(292, 266)   
16Me.Controls.Add(Me.TextBox1)   
17Me.Name = "Form1"   
18Me.Text = "Form1"   
19Me.ResumeLayout(False) 
20
21End Sub 
22
23#End Region   
24Dim str As String = "" 
25
26Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged   
27Dim num As Integer = 0   
28Dim temp As String = ""   
29While num &lt; TextBox1.Text.Length   
30temp += "[0-9]"   
31num += 1   
32End While 
33
34If Not (TextBox1.Text Like temp) Then   
35TextBox1.Text = str   
36TextBox1.Focus()   
37Else   
38str = TextBox1.Text   
39End If   
40End Sub   
41End Class</system.diagnostics.debuggerstepthrough()>