Regular Expression for avoid special character in TextBox

Question

Hello Friends Can any one tell me  I want to check and avoid special character in text box at client side with using RegularExpressionValidator. Thanks

Vulpes · Answer

It depends what you mean by special characters. The following regular expression only allows upper or lower case letters digits or spaces: string regExp = @^[a-zA-Z0-9\s]+$;

Vulpes · Answer

Kunal Yes. it will disallow those two characters. However it will also disallow some others which you might want to allow such as hyphen and underscore. It so you can use this regular expression instead: string regExp = @^[\w\s-]+$; \w is a regular expression metacharacter which is equivalent to [a-zA-Z_0-9]. The hyphen used here is to specify a range of characters rather than the hyphen character itself so if you want to allow hyphen as well then you have to stick it on the end.

Kunal Vaishya · Answer

Thank you Vulpes

Sanjeeb Lenka · Answer

try this ValidationExpression=^[a-zA-Z0-9]+$ ErrorMessage=no special character>

Kunal Vaishya · Answer

Thanks Vulpes I want to avoid (') and () aslo so it will works ?