利用正则表达式自动给Email地址和Url加上连接

using system;

using system.text.regularexpressions;

namespace commlayer

{

       /// <summary>

       /// 自动给邮件地址或email地址加上url

       /// </summary>

       public class hyperlinkurl

       {

              private static regex urlregex = new regex(@"(http:////([/w.]+//?)/s*)",

                     regexoptions.ignorecase|regexoptions.compiled);

              private static regex emailregex = new regex(@"([a-za-z_0-9.-]+/@[a-za-z_0-9.-]+/./w+)",

                     regexoptions.ignorecase|regexoptions.compiled);

              public hyperlinkurl()

              {                  

              }

              /// <summary>

              /// 生成带连接的字符串

              /// </summary>

              /// <param name="link">需要生成带连接地址的字符串</param>

              /// <returns>经过转换的字符串</returns>

              public static string genhyperlinkurl(string link)

              {

                     link = emailregex.replace(link, "<a href=mailto:$1>$1</a>");

                     link = urlregex.replace(link, "<a href=/"$1/" target=/"_blank/">$1</a>");

                     return link;

              }

       }

}