check alphanumeric characters in string in c#

Question

I have used the following code but it is returning false though it should return true

string check,zipcode;
zipcode=\"10001 New York, NY\";
check=isalpha         


        

Answer 1

Try this one:

public static Boolean isAlphaNumeric(string strToCheck)
{
    Regex rg = new Regex(@"^[a-zA-Z0-9\s,]*$");
    return rg.IsMatch(strToCheck);
}

It's more undestandable, if you specify in regex, what your string SHOULD contain, and not what it MUST NOT.

In the example above:

• ^ - means start of the string
• []* - could contain any number of characters between brackets
• a-zA-Z0-9 - any alphanumeric characters
• \s - any space characters (space/tab/etc.)
• , - commas
• $ - end of the string