Imports System.ComponentModel

Public Class MyTextBox
    Inherits System.Windows.Forms.TextBox
    Implements INotifyPropertyChanged
    Property _numbersOnly As Boolean = False
    Property _ShortDateOnly As Boolean = False
    Property _Waehrung As Boolean = False
    Property _Prozent As Boolean = False
    Property _useAsBindingText As Boolean = False


    Public Sub New()

        If _Waehrung Then MyBase.TextAlign = HorizontalAlignment.Right
        ' Me.Focus()
    End Sub

    Private Sub MyTextBox_BindingContextChanged(sender As Object, e As EventArgs) Handles Me.BindingContextChanged
        ' If _ShortDateOnly Then
        'If IsDate(sender.text) Then sender.text = CDate(sender.text).ToShortDateString
        ' End If

        '    If _Waehrung Then
        'If IsNumeric(sender.text) Then sender.text = String.Format("{0:N2}", CDbl(sender.text))
        'End If
    End Sub


    ' Sub fillWithSQL(sql As String, Optional conn As String = "SDL")
    '     Me._value = (New SQL).getValueTxtBySql(sql, conn)
    ' End Sub

    Private Sub MyTextBox_KeyDown(sender As Object, e As KeyPressEventArgs) Handles Me.KeyPress
        If _numbersOnly Then
            If (Microsoft.VisualBasic.Asc(e.KeyChar) < 48) _
              Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 57) Then
                e.Handled = True
            End If
            If (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then
                e.Handled = False
            End If
        End If
    End Sub

    Private Sub MyTextBox_Layout(sender As Object, e As LayoutEventArgs) Handles Me.Layout
        MyBase.CausesValidation = True
        If _ShortDateOnly Then MyBase.MaxLength = 10
    End Sub

    Private Sub MyTextBox_Leave(sender As Object, e As EventArgs) Handles Me.Leave
        '    If _DateOnly AndAlso Not isShortDate(sender.text) Then sender.focus()
        If _Waehrung Then
            Try
                sender.text = String.Format("{0:N2}", CDbl(sender.text))
                sender.ForeColor = System.Drawing.Color.Black
            Catch ex As Exception
                sender.ForeColor = System.Drawing.Color.Red
            End Try

        End If

        If _Prozent Then
            Try
                _value = CDbl(sender.text.ToString.Replace("%", "")) / 100
            Catch ex As Exception
                sender.ForeColor = System.Drawing.Color.Red
                _value = Propvalue
            End Try
        End If
        If _useAsBindingText Then
            _value = sender.text.ToString
        End If
    End Sub


    Private Sub MyTextBox_Textchanged(sender As Object, e As EventArgs) Handles Me.TextChanged
        sender.ForeColor = System.Drawing.Color.Black
        If _numbersOnly Then
            If Not IsNumeric(sender.text) Then sender.ForeColor = System.Drawing.Color.Red
        End If
        If _ShortDateOnly Then
            If Not isShortDate(sender.text) Then sender.ForeColor = System.Drawing.Color.Red
        End If
        If _Waehrung Then
            Try
                sender.text = String.Format("{0:N2}", CDbl(sender.text))
            Catch ex As Exception
                sender.ForeColor = System.Drawing.Color.Red
            End Try
        End If
    End Sub
    Function isShortDate(d) As Boolean
        Return CBool(IsDate(d) And d.length = 10)
    End Function


    Public Propvalue As String
    Public Property _value As String
        Get
            Return Propvalue
        End Get
        Set(v As String)
            If _Prozent Then
                Propvalue = v
                MyBase.Text = String.Format("{0:P2}", CDbl(Propvalue))
                OnPropertyChanged("_value")
            End If
            If _useAsBindingText Then
                Propvalue = v
                MyBase.Text = Propvalue
                OnPropertyChanged("_value")
            End If
        End Set
    End Property


    Public Event PropertyChanged As PropertyChangedEventHandler _
     Implements INotifyPropertyChanged.PropertyChanged

    Protected Sub OnPropertyChanged(ByVal name As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(name))
    End Sub

    Private Sub MyTextBox_Validating(sender As Object, e As CancelEventArgs) Handles Me.Validating
        If sender.text = "" Then e.Cancel = False : Exit Sub 'wenn der Test leer ist, stimmt die Eingabe

        Dim errMessage As String = "Es ist ein Validierungsfehler aufgetreten:" & vbNewLine
        Dim errDescription As String = "Überprüfen Sie die Eingabe!"

        If _Waehrung Then
            Try
                String.Format("{0:N2}", CDbl(sender.text))
                e.Cancel = False
            Catch ex As Exception
                errDescription = "Die Eingabe muss eine Zahl sein! (z.B. 123,45)"
                e.Cancel = True
            End Try
        End If

        If _Prozent Then
            e.Cancel = False
        End If

        If _ShortDateOnly Then
            If isShortDate(sender.text) Then
                e.Cancel = False
            Else
                e.Cancel = True
            End If
        End If

        If e.Cancel Then
            MsgBox(errMessage & errDescription)
        End If
    End Sub

    Private Sub MyTextBox_Validated(sender As Object, e As EventArgs) Handles Me.Validated

        'Wenns stimmt
    End Sub
End Class