Textbox only accept certain characters

Pirahnaplant · #1 (**permalink**) 07-09-2009, 10:43 PM

How can I make a text box only accept certain characters?

danijel.drmic · #2 (**permalink**) 07-09-2009, 11:18 PM

For example, if you want to textbox2 allow import of only the digits from 1 to 5 try this:

Code:

    Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
        If e.KeyChar < Chr(49) Or e.KeyChar > Chr(53) Then e.Handled = True
    End Sub

maybe you will need this:
Ascii Table - ASCII character codes and html, octal, hex and decimal chart conversion

I hope that I helped

JohnH · #3 (**permalink**) 07-10-2009, 8:02 AM

Another way is this:

Code:

Private Sub TextBox1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyDown
    Select Case e.KeyCode
        Case Keys.A, Keys.B, Keys.C
            'allowed
        Case Else
            'not allowed
            e.SuppressKeyPress = True
    End Select
End Sub

Keys Enumeration (System.Windows.Forms)

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