Question

C#取括号里面的值，正则表达式怎么写

用正则表达式取括号里面的值

例如 string str= abc(123);
取出 str=123;

只要括号里面的值，用正则表达式怎么做？

Answer 1

Regex reg = new Regex(@"\(([^)]*)\)");
Match m = reg.Match(str);
if(m.Success)
Response.Write(m.Result("$1"));

Answer 2

string str= "abc(123)";
Regex reg = new Regex(@"str=|\d{3}");
Match m = reg.Match(str);
Response.Write(m.Value);//此值便是你想要的:取出 str=123;

Answer 3

string str = "absd(123)";
MatchCollection _MatchCollection = Regex.Matches(str, ".*?(?<num>[0-9]{1,}).*?", RegexOptions.IgnoreCase);
foreach (Match item in _MatchCollection)
{
MessageBox.Show(item.Groups["num"].Value);
}