利用正则表达式 替换字符串中多个 URL

        Regex urlregex = new Regex(@"(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?",     // 正则表达式              
                                RegexOptions.IgnoreCase | RegexOptions.Compiled);


                                string oldProName = modelProName;
                                string newProName = modelProName;

                                string strtitle = modelProName;

                                if (urlregex.IsMatch(modelProName))    
                                {
                                    foreach (Match match in urlregex.Matches(modelProName)) //Match对象
                                    {
                                        string url = match.Value;
                                        if (url != match.NextMatch().Value)     //防止重复替换相同的链接
                                        {
                                            //  newProName = urlregex.Replace(oldProName, "<a href=\"" + url + "\" target=\"_blank\" style=\"color:blue\">点击打开</a>");
                                            newProName = newProName.Replace(url, "<a href=\"" + url + "\" target=\"_blank\" style=\"color:blue\">点击打开</a>");   //利用String.Replace()，将获取到的子字符串替换成replacement
                                        }
                                    }


                                }