url 自动加入链接

 1 string  strContent  =  TextBox1.Text;
 2
 3              // (http:\/\/([\w.]+\/?)\S*)
 4              // http: // ([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?
 5
 6              // 都是匹配url的正则
 7             Regex urlregex  =   new  Regex( @" (http:\/\/([\w.]+\/?)\S*) " ,RegexOptions.IgnoreCase |  RegexOptions.Compiled);
 8             
 9             System.Text.RegularExpressions.MatchCollection match = urlregex.Matches(strContent);
10         
11              for ( int  i = 0 ;i < match.Count;i ++ )
12              {
13                //"<a href=\"\" target=\"_blank\"></a>");
14                strContent = strContent.Replace(match[i].Value,"<a href=\""+match[i].Value+"\">"+match[i].Value+"</a>");
15            }
16             Label1.Text +=   " <br> " + strContent;
17