正则表达式用目录名中的下划线替换短划线而不是文件名

Question

字符串示例为：

/my/test-is/for-this/to/work-right.txt

应该是：

/my/test_is/for_this/to/work-right.txt

有人想弯曲他们的Regex-Fu肌肉吗？

Answer 1

不，不是真的。使用Path.GetDirectoryName和朋友更好：

var s = "/my/test-is/for-this/to/work-right.txt";
var result = Path.Combine(
     Path.GetDirectoryName(s).Replace("-", "_"),
     Path.GetFileName(s)
);

如果您的路径使用/作为目录分隔符，那么您在Windows上运行并且不希望它被\替换，您可以随后撤消替换：

// What I 'm really doing here is showing that these constants exist;
// read the manual to see what you can expect from them.
result = result.Replace(
    Path.DirectorySeparatorChar,
    Path.AltDirectorySeparatorChar
);