Check for special characters (/*-+_@&$#%) in a string?

Question

How do I check a string to make sure it contains numbers, letters, or space only?

Answer 1

Simple:

function HasSpecialChars(string yourString) {     return yourString.Any( ch => ! Char.IsLetterOrDigit( ch ) ) } 

Answer 2

The easiest way it to use a regular expression:

Regular Expression for alphanumeric and underscores

Using regular expressions in .net:

http://www.regular-expressions.info/dotnet.html

MSDN Regular Expression

Regex.IsMatch

var regexItem = new Regex("^[a-zA-Z0-9 ]*$");  if(regexItem.IsMatch(YOUR_STRING)){..}