Regex for alphanumeric

public bool IsAlphaNumeric(string inputString)
{
Regex r = new Regex("^[a-zA-Z0-9]+$");
if (r.IsMatch(inputString))
return true;
else
return false;
}


Verifying that textbox text contains only alphanumeric value as well as space character through Regular Expression Validator in asp.net (validation controls).

<asp:textbox id="txtName" runat="server" xmlns:asp="#unknown">

<asp:regularexpressionvalidator id="REValphaOnly" runat="server" errormessage="Please enter only alphanumeric." controltovalidate="txtName" validationexpression="^[a-zA-Z0-9]+$" xmlns:asp="#unknown">

Try below one.

^[A-Za-z0-9]{6,15}$

-Asif