How to restrict specific combination of characters in afield

May 31 2020 10:51 AM

I don't want to allow, any alphabet exactly after < in a textbox/textfiled.

User should not be able to submit if he/she enters "<x" in textbox/textfiled. where x = [a-z],[A-Z]

For Example

Don't allow -

1) k<Aw

2) <b

3) 1<head

4) ceK<<<<<<D

Allow -

1) <

2) k<

3) l>

4) K<

5) )1w<.l

6) d<1b

7) B<,e

8) .kk<<<<<>a

C# Code -

[AllowHtml]

[RegularExpression(@"X", ErrorMessage = "Error Message for Don't allowed Text")]

public string Textbox { get; set; }

Please provide the value of X, which will meet my rquirement.
Note - The solution should work for multiline textbox also.

Answers (2)