How to restrict special character and number in textbox ?

abhishek_kumar_rch · July 15th, 2012, 06:53 AM

Hi,
I would like to use regualar expression validation contros to validate a multiline textbox in such a way so that
user unable to enter certain words (like numbers in words one , two, three, four, rediffmail,yahoo com,gmail).

For example when any user try to show his phone nuber like my phone nuber is nine two three four like that.
Then he got * mark as a validator because in text box one can not enter such words.
Please help me.

guenfire · July 16th, 2012, 12:34 AM

Hello, abhishek_kumar_rch: I would suggest you check out Regular Expressions (Visual Studio) for complete information on how to filter on certain words. You can enter your expression by adding the validator to the page, referencing the control to be validated, and then entering the expression in the textbox provided on the properties page for the control.

If you wanted to permit only numbers, for example, you could use:

Code:

($[0-9]+)

Again, the link above takes you to details on how to filter on regular expressions. Happy coding!