1.截取字符串中指定內容
{"weatherinfo":{"city":"北京","cityid":"101010100","temp":"-4","WD":"西北風","WS":"2級","SD":"29%","WSE":"2","time":"09:40","isRadar":"1","Radar":"JC_RADAR_AZ9010_JB"}}
string pattern = "{/"weatherinfo/":(.*)}";
var result = Regex.Match(weatherQueryResult, pattern, RegexOptions.IgnoreCase).Groups;
返回結果為{"city":"北京","cityid":"101010100","temp":"-4","WD":"西北風","WS":"2級","SD":"29%","WSE":"2","time":"09:40","isRadar":"1","Radar":"JC_RADAR_AZ9010_JB"}
2.截取字符串中的數字
string s = "B123-C12";
MatchCollection vMatchs = Regex.Matches(s, @"(/d+)");
vMatchs[0].Value
返回結果 123，12
3.截取字符串中的字母
string str = "呵呵呵呵aB-cFe-sdfEww";
MatchCollection m = Regex.Matches(str, @"[A-Z]+");//小寫字母為a-z 大小寫混合為a-zA-Z
返回結果為B/F/E
