ASP.NET正则表达式，URL,Email
public static bool IsUrl(this string str)
{
if (str.IsNullOrEmpty())
return false;
string pattern = @"^(http|https|ftp|rtsp|mms):(\/\/|\\\\)[A-Za-z0-9%\-_@]+\.[A-Za-z0-9%\-_@]+[A-Za-z0-9\.\/=\?%\-&_~`@:\+!;]*$";
return Regex.IsMatch(str, pattern, RegexOptions.IgnoreCase);
}
public static bool IsEmail(this string str)
{
return Regex.IsMatch(str, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
}