![]() This may be too late, but for other new blood on VB out there, here's something simple.įirst, in any case, unless your application would require, blocking user's key entry is somehow not a good thing to do, users may misinterpret the action as problem on the hardware keyboard and at the same time may not see where their keypreesed entry error came from. Meaning that if the operator entered "-1w3" after focus changes it will return as "-13" automatically. With all these combined whenever they type something into the box it will act as if it were a textbox but when they change focus the ToInteger extension will set the value as an integer into the property and return it to the textbox. Public Function toInteger(Of T)(ByRef X As T, Optional I As Integer = 0) As IntegerĮlseIf Double.Parse(result) < Double.Parse() Then ''' Handles conversion of variable to Integer. If Double.Parse(result) > Double.Parse() Then If Integer.TryParse(result, ReturnInt) Then If Integer.TryParse(Character, Parsed) Then Public Function HandledStringtoInteger(s As String) As Integer I know this post is old but I wanted to share something I have implemented to turn a TextBox into what I call an IntBox.įirst you need to make an extension with: _ Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.LoadĪssignValidation(Me.TextBox1, ValidationType.Only_Digits)ĪssignValidation(Me.TextBox2, ValidationType.Only_Characters)ĪssignValidation(Me.TextBox3, ValidationType.No_Blank)ĪssignValidation(Me.TextBox4, ValidationType.Only_Email) Now use following code to Form Load Event like below. ![]() MessageBox.Show("Please Enter a valid Email Address", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information) Public Sub Email_Leave(ByVal sender As Object, ByVal e As System.EventArgs)ĭim Email As = senderĭim rex As Match = Regex.Match(Trim(Email.Text), RegexOptions.IgnoreCase) Public Sub NotNull_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Public Sub OCHAR_Leave(ByVal sender As Object, ByVal e As ) ![]() Public Sub Phonenumber_Leave(ByVal sender As Object, ByVal e As ) Public Sub number_Leave(ByVal sender As Object, ByVal e As )ĭim numbers As = sender Public Sub AssignValidation(ByRef CTRL As, ByVal Validation_Type As ValidationType)ĪddHandler txt.KeyPress, AddressOf number_LeaveĪddHandler txt.KeyPress, AddressOf OCHAR_LeaveĪddHandler txt.Leave, AddressOf NotNull_LeaveĪddHandler txt.Leave, AddressOf Email_LeaveĪddHandler txt.KeyPress, AddressOf Phonenumber_Leave ![]() Simplest ever solution for TextBox Validation in VB.NETįirst, add new VB code file in your project.ĬOPY & PASTE following code into this file and give it a suitable name. ![]()
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