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How to allow only ABCD in textbox using c#

Raja

10y1.3k.NET

I want to validate textbox only enter capital ABCD or small abcd how to do it in  c#.

2 Replies

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Midhun Tp10y ago
Accepted answer
Hi,
Please try below code-
Regex regex = new Regex(@"^[a-dA-D]*$");
if (!regex.Match(Textbox1.Text).Success)
{
//does not match your pattern
}
0
Upendra Pratap Shahi10y ago
Where you want to validate this, in client side or server side.
If you want to do on client side, use Jquery or JavaScript if on server side then use c#.
Where you have to need for validation?
+1