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VB.NET中让Textbox只能输入数字

发布时间:2019-09-13 20:51:14

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

Private Sub InitializeComponent()

Me.TextBox1 = New System.Windows.Forms.TextBox

Me.SuspendLayout()

'

'TextBox1

'

Me.TextBox1.Location = New System.Drawing.Point(112, 96)

Me.TextBox1.Name = "TextBox1"

Me.TextBox1.TabIndex = 0

Me.TextBox1.Text = ""

'

'Form1

'

Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)

Me.ClientSize = New System.Drawing.Size(292, 266)

Me.Controls.Add(Me.TextBox1)

Me.Name = "Form1"

Me.Text = "Form1"

Me.ResumeLayout(False)

End Sub

#End Region

Dim str As String = ""

Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp

If (e.KeyValue > 47 And e.KeyValue < 58) Or (e.KeyValue > 95 And e.KeyValue < 106) Or (e.KeyValue = 8) Or (e.KeyValue = 45) Or (e.KeyValue = 46) Then

str = TextBox1.Text

Else

TextBox1.Text = str

TextBox1.Focus()

End If

End Sub

End Class

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