Public Class MyTextBox Inherits System.Windows.Forms.TextBox Private m_strValidText As String = "0123456789.+-" & Chr(13).ToString Private m_blnEditable As Boolean = True
#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
'UserControl1 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。 <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() components = New System.ComponentModel.Container End Sub
#End Region
Private Sub MyTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles MyBase.KeyPress Dim strLocalString As String If EditAble Then strLocalString = m_strValidText & Chr(8).ToString Else strLocalString = m_strValidText End If If UCase(strLocalString).IndexOf(UCase(e.KeyChar)) < 0 Then e.Handled = True Beep() Else
End If End Sub Public Property ValidText() As String Get Return m_strValidText End Get Set(ByVal Value As String) m_strValidText = Value End Set End Property Public Property EditAble() As Boolean Get Return m_blnEditable End Get Set(ByVal Value As Boolean) m_blnEditable = Value End Set End Property End Class