validation

Hi,

Try following Regex

^[a-zA-Z0-9]*$

 

C#

var regex = "^[a-zA-Z0-9]*$";
var your_text1 = "udaydodiya123"
var your_text2 = "uday dodiya $123"
var match1 = Regex.Match(your_text1 , regex, RegexOptions.IgnoreCase);
var match2 = Regex.Match(your_text2 , regex, RegexOptions.IgnoreCase);

if (!match1.Success)
{
    Console.WriteLine("First Expression Does Not Match");
}
else
{
    Console.WriteLine("First Expression Match");
}

if (!match2.Success)
{
    Console.WriteLine("Second Expression Does Not Match");
}
else
{
    Console.WriteLine("Second Expression Match");
}

Output :

First Expression Match

Second Expression Does Not Match