c# 正则表达式取值、替换

//例如我想把如下格式记录中的NAME值修改为WANG
string line = "ADDR=1234;NAME=ZHANG;PHONE=6789";
Regex reg = new Regex("NAME=(.+);");
string modified = reg.Replace(line, "NAME=WANG;");
//修改后的字符串为 ADDR=1234;NAME=WANG;PHONE=6789

  

//例如我想提取记录中的NAME值
string line = "ADDR=1234;NAME=ZHANG;PHONE=6789";
Regex reg = new Regex("NAME=(.+);");
Match match = reg.Match(line);
string value = match.Groups[1].Value;
Console.WriteLine("value的值为：{0}", value);

　　

            string html = "<ol><li>发顺丰</li><li>灌灌灌</li></ol><div style=\"text-align: center;\"><img src=\"data: image/jpeg; base64,/9j/4QAYRXhpZgAASUkqAAEQf//Z\"><br></div>";
            Regex myreg = new Regex("base64,(.+)\"");
            Match myMatch = myreg.Match(html);
            string aaa = myMatch.Groups[1].Value;
            string bbb = myreg.Replace(html, "base64,http://www.66kangba.com\"");

 

　　过滤特殊字符

string result = Regex.Replace(search.Trim(), @"\W", "");

　　

更多详情见：https://www.cnblogs.com/hehehehehe/p/6043710.html