VB.NET

VB.NET RSS

Textbox Validation

Please support our VB.NET advertiser: Intel Parallel Studio Home

Thread Solved

•

Join Date: Sep 2007

Posts: 72

Reputation: geetajlo is an unknown quantity at this point

Solved Threads: 0

geetajlo

Offline

Junior Poster in Training

Textbox Validation

Jun 2nd, 2008

Hi i want to prevent the user from entering number and special charaters in a textbox and another textbox from entering alphabets and specials characters .....

Need it quickly coz 2moro have to submit my project...

•

Join Date: Nov 2007

Posts: 2,641

Reputation: Jx_Man is a glorious beacon of light

Solved Threads: 245

Jx_Man

Offline

Posting Maven

Re: Textbox Validation

Jun 2nd, 2008

This following code just allowed you to entered numbers only (No alphabetics or any special characters) :

 Help with Code Tags 
 vb.net Syntax (Toggle Plain Text) 
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
    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 Sub
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
    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 Sub

This following code just allowed you to entered strings / alphabetics only (no numbers or any special characters):

 Help with Code Tags 
 vb.net Syntax (Toggle Plain Text) 
Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
        If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _
            Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) _
            And (Microsoft.VisualBasic.Asc(e.KeyChar) < 97) _
            Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 122) Then
            'Allowed space
            If (Microsoft.VisualBasic.Asc(e.KeyChar) <> 32) Then
                e.Handled = True
            End If
        End If
        ' Allowed backspace
        If (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then
            e.Handled = False
        End If
End Sub
Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
        If (Microsoft.VisualBasic.Asc(e.KeyChar) < 65) _
            Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 90) _
            And (Microsoft.VisualBasic.Asc(e.KeyChar) < 97) _
            Or (Microsoft.VisualBasic.Asc(e.KeyChar) > 122) Then
            'Allowed space
            If (Microsoft.VisualBasic.Asc(e.KeyChar) <> 32) Then
                e.Handled = True
            End If
        End If
        ' Allowed backspace
        If (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then
            e.Handled = False
        End If
End Sub

Last edited by Jx_Man; Jun 2nd, 2008 at 8:33 am.

Never tried = Never Know
So, Please do something before post your thread.
* PM Asking will be ignored *

•

Join Date: Apr 2008

Posts: 54

Reputation: Pgmer is an unknown quantity at this point

Solved Threads: 5

Pgmer

Offline

Junior Poster in Training

Re: Textbox Validation

Jun 3rd, 2008

To make text box to accept only numbers, in key press event of that textbox u can code like this

If Char.IsDigit(e.KeyChar) = False And Char.IsControl(e.KeyChar) = False Then
e.Handled = True
MsgBox("Please enter valid number ")
End If

i think u can mannage other one..

Last edited by Pgmer; Jun 3rd, 2008 at 3:24 am.

•

Join Date: Sep 2008

Posts: 3

Reputation: sabeerpasha is an unknown quantity at this point

Solved Threads: 0

sabeerpasha sabeerpasha is offline

Offline

Newbie Poster

Re: Textbox Validation

Mar 2nd, 2009

•

Originally Posted by geetajlo

Hi i want to prevent the user from entering number and special charaters in a textbox and another textbox from entering alphabets and specials characters .....

Need it quickly coz 2moro have to submit my project...

--------
Use the following code..
#Region "TextBox Events"

Private Sub txtFinRefNo_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtFinRefNo.KeyPress
Try
If Char.IsLetterOrDigit(e.KeyChar) = False And Char.IsControl(e.KeyChar) = False Then
e.Handled = True
End If
Catch ex As Exception
ShowException(ex.Message, MESSAGEBOX_TITLE, ex)
End Try
End Sub
#End Region

sabeer pasha.