Question

I want to user to enter only numbers and characters in textbox i.e no special charaters.
I don’t want to use key press event of textbox.

As i need same validation in gridview.

So i want to validate whole string.

Thanks in advance.

Answer 1

Using the Regex class for regular expressions you can use:

If Regex.IsMatch(myString, "^[A-Za-z0-9]+$") Then
    'Do stuff
End If

EDIT: I forgot to add the ^ and the $ to denote that the match should go from start to finish on the string. You’ll also need to put a \s in there if whitespace is allowed.