你有很多选择——比如你可以捕获所有 DATA 并稍后检查文本 DATA 之前有多少元素 '/' (例如在第一组中);您可以检查更长的字符串等 - 正是您要求的东西,您可以使用代码模拟和重用:
string type_1 = "" +
"root/DATA/some/file.txt" + "\n" +
"root/DATA/another/file.txt" + "\n" +
"root/DATA/yet/another/file.exe" + "\n" +
"root/site/some/other/folder/before/DATA/file.xml" + "\n" +
"root/site/some/other/folder/DATA/file2.xml";
Console.WriteLine ("Start TEXT:");
Console.WriteLine (type_1);
Console.WriteLine ("Result TEXT:");
MatchCollection mat = Regex.Matches (type_1, "^[^/]*/DATA.*?$", RegexOptions.Compiled|RegexOptions.Multiline);
Console.WriteLine (mat.Count);
foreach (Match m in mat) {
Console.WriteLine (m.ToString ());
}
它的工作结果是:
Start TEXT:
root/DATA/some/file.txt
root/DATA/another/file.txt
root/DATA/yet/another/file.exe
root/site/some/other/folder/before/DATA/file.xml
root/site/some/other/folder/DATA/file2.xml
Result TEXT:
3
root/DATA/some/file.txt
root/DATA/another/file.txt
root/DATA/yet/another/file.exe
它通过假设没有'/'可以在第一个'DATA'之前起作用。