Imports System.Windows.Forms
public class TextBoxValidating
public Shared Sub Main
Application.Run(New Form1)
End Sub
End class
Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
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
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents Label1 As System.Windows.Forms.Label
Friend WithEvents txtInput As System.Windows.Forms.TextBox
Friend WithEvents Label2 As System.Windows.Forms.Label
Friend WithEvents Label3 As System.Windows.Forms.Label
Friend WithEvents lblTrue As System.Windows.Forms.Label
Friend WithEvents lblCheck As System.Windows.Forms.Label
Friend WithEvents lblResults As System.Windows.Forms.Label
Friend WithEvents btnClear As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.Label1 = New System.Windows.Forms.Label()
Me.txtInput = New System.Windows.Forms.TextBox()
Me.Label2 = New System.Windows.Forms.Label()
Me.Label3 = New System.Windows.Forms.Label()
Me.lblTrue = New System.Windows.Forms.Label()
Me.lblCheck = New System.Windows.Forms.Label()
Me.lblResults = New System.Windows.Forms.Label()
Me.btnClear = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'Label1
'
Me.Label1.Font = New System.Drawing.Font("Tahoma", 14.25!, (System.Drawing.FontStyle.Bold Or System.Drawing.FontStyle.Italic), System.Drawing.GraphicsUnit.Point, CType(0, Byte))
Me.Label1.Location = New System.Drawing.Point(48, 16)
Me.Label1.Name = "Label1"
Me.Label1.Size = New System.Drawing.Size(176, 23)
Me.Label1.TabIndex = 0
Me.Label1.Text = "ISBN Validation"
'
'txtInput
'
Me.txtInput.Location = New System.Drawing.Point(72, 64)
Me.txtInput.Name = "txtInput"
Me.txtInput.TabIndex = 1
Me.txtInput.Text = ""
'
'Label2
'
Me.Label2.Location = New System.Drawing.Point(24, 104)
Me.Label2.Name = "Label2"
Me.Label2.Size = New System.Drawing.Size(80, 23)
Me.Label2.TabIndex = 2
Me.Label2.Text = "True Number:"
'
'Label3
'
Me.Label3.Location = New System.Drawing.Point(32, 152)
Me.Label3.Name = "Label3"
Me.Label3.Size = New System.Drawing.Size(72, 23)
Me.Label3.TabIndex = 3
Me.Label3.Text = "Check Digit:"
'
'lblTrue
'
Me.lblTrue.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.lblTrue.Location = New System.Drawing.Point(112, 104)
Me.lblTrue.Name = "lblTrue"
Me.lblTrue.TabIndex = 4
'
'lblCheck
'
Me.lblCheck.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
Me.lblCheck.Location = New System.Drawing.Point(112, 152)
Me.lblCheck.Name = "lblCheck"
Me.lblCheck.TabIndex = 5
'
'lblResults
'
Me.lblResults.Location = New System.Drawing.Point(56, 192)
Me.lblResults.Name = "lblResults"
Me.lblResults.Size = New System.Drawing.Size(152, 24)
Me.lblResults.TabIndex = 6
'
'btnClear
'
Me.btnClear.Location = New System.Drawing.Point(88, 240)
Me.btnClear.Name = "btnClear"
Me.btnClear.TabIndex = 7
Me.btnClear.Text = "Clear"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(264, 293)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnClear, Me.lblResults, Me.lblCheck, Me.lblTrue, Me.Label3, Me.Label2, Me.txtInput, Me.Label1})
Me.Name = "Form1"
Me.Text = "ISBN Validation"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub IsbnValidation(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles txtInput.Validating
Console.WriteLine("validating")
End Sub
Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
txtInput.Text = ""
lblResults.Text = ""
lblTrue.Text = ""
lblCheck.Text = ""
End Sub
Private Sub txtInput_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtInput.KeyPress
Dim keyChar As Char
keyChar = e.KeyChar
' Suppress any keys except digits,X,x,hyphen (45),Backspace (8),or Enter (13)
If ((Not Char.IsDigit(keyChar)) _
And (AscW(keyChar) <> 8) _
And (AscW(keyChar) <> 13) _
And (keyChar <> "X"c) _
And (keyChar <> "x"c) _
And (AscW(keyChar) <> 45)) Then
' Do not display the keystroke
e.Handled = True
End If
End Sub
End Class
