How to Allow letters,numbers,some special characters only?

Question

i want to allow letters,numbers and some special characters in textbox(,.\-_)this special characters only or throw error message how to do it.

Answer 1

Hi,

Please try below expression -

Regex regex = new Regex(@"^[a-zA-Z0-9 ,.\\-_]*$");

if (!regex.Match(Textbox1.Text).Success)

{

//does not match your pattern

}

Answer 2

Hi,

 

Based on your requirement you can use the following Regex Code.

Regex regex = new Regex(@"[^0-9\\(,._)\-\a-zA-Z]");

Please check this demo :

 

http://regexr.com/3ebkn

Answer 3

Hi,

you need to use Regex.

^(?=.*[a-zA-Z\d].*)[a-zA-Z\d!@#$%&*]{7,}$

Answer 4

Hi,

 

You can use the code regex inside the textBox1_TextChanged event in Textbox Control In Asp.net.

Answer 5

Hi,

Please check the following reference :

http://stackoverflow.com/questions/12607087/only-allow-specific-characters-in-textbox

Answer 6

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Answer 7

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