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Use KeyChar to limit the characters that can be entered into a Text Box

A method to allow the user to enter only certain specific characters into a text box and ignore any other key. In this example only numbers, the Backspace key and the period will be allowed, everything else is ignored.

Submitted By: Jayman
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Rating:
Views: 12,174

Language: VB.NET
Last Modified: August 9, 2006
Instructions: Put this code inside the KeyPress event for any text box that you want to limit user input.

Snippet


  1. 'allow only numbers, the Backspace key and the period
  2.  
  3. If (e.KeyChar < "0" OrElse e.KeyChar > "9") _
  4.     AndAlso e.KeyChar <> ControlChars.Back AndAlso e.KeyChar <> "." Then
  5.     'cancel keys
  6.     e.Handled = True
  7. End If

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Comments


jagatworld 2008-05-16 23:18:21

Thanks, i am using this. Actually i used it way long back ofcourse, but now, your code came handy to my project. Regds.
Mommy 2008-08-05 18:28:19

Works like a charm ;)

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