string str1 = "1";
string str2 = "2";
string str3 = "3";
string str4 = "4";
string str = "1X23Y4";
string pattern = string.Format(@"(?<={0})(((?!{1}).)*)(?={1}{2}(((?!{3}).)*){3})", str1, str2, str3, str4);
str = Regex.Replace(str, pattern, "$3");
如果2-3之间有未知的字符串,这个正则该怎么改改???c#
string str2 = "2";
string str3 = "3";
string str4 = "4";
string str = "1X23Y4";
string pattern = string.Format(@"(?<={0})(((?!{1}).)*)(?={1}{2}(((?!{3}).)*){3})", str1, str2, str3, str4);
str = Regex.Replace(str, pattern, "$3");
如果2-3之间有未知的字符串,这个正则该怎么改改???c#
解决方案 »
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