1、判断是否匹配

Regex re = new Regex("\\\\u[0123456789abcdef]{4}",RegexOptions.IgnoreCase);

re.IsMatch(InputStr);

2、使用Match判断匹配并取匹配的值

string strReg = @"((product_list).+?\})";//short开始的提取出来
Regex re = new Regex(strReg,RegexOptions.IgnoreCase);
if (re.Match(inputStr).Success)

{

sb.Append(re.Match(inputStr).Value);//获取匹配的值

}

3、匹配多组，循环匹配的组

string strReg = @"((product_list).+?\})";

Regex re = new Regex(strReg,RegexOptions.IgnoreCase); string res; MatchCollection mc = re.Matches(inputStr); foreach (Match ma in mc) { string aa = ma.Value; if (aa.Contains("DNH")) { str2=System.Text.RegularExpressions.Regex.Split(aa,","); res = str2[1]; } }