C#正则表达式匹配与替换字符串功能示例

string text = @"public string testMatchObj string s string match ";string pat = @"(/w+)/s+(string)";// Compile the regular expression.Regex r = new Regex(pat, RegexOptions.IgnoreCase);// Match the regular expression pattern against a text string.Match m = r.Match(text);int matchCount = 0;while (m.Success) { Response.Write("Match"+ (++matchCount) + "<br>"); for (int i = 1; i <= 2; i++)  { Group g = m.Groups[i]; Response.Write("Group"+i+"='" + g + "'" + "<br>"); CaptureCollection cc = g.Captures; for (int j = 0; j < cc.Count; j++)  {  Capture c = cc[j];  Response.Write("Capture"+j+"='" + c + "', Position="+c.Index + "<br>"); } } m = m.NextMatch();}

string x = this.txt.Text;RegexOptions ops = RegexOptions.Multiline;Regex r = new Regex(@"/[(.+?)/]", ops); ///[(.+?)///]  @"/[(.+)/](.*?)/[///1/]"//Response.Write(r.IsMatch(x).ToString()+DateTime.Now.ToString());if (r.IsMatch(x)){    x = r.Replace(x, "<$1>");    Response.Write(x.ToString() + DateTime.Now.ToString());    //Console.WriteLine("var x:" + x);//输出：Live for nothing}else{    Response.Write("false" + DateTime.Now.ToString());}