Question

我需要使用Path.GetFileName()提取路径信息，当输入字符串的最后一个字符是DirectorySeparatorChar（'/'或'\'）时，此函数不起作用。

我想出了这段代码，但它太冗长了。还有更好的方法吗？

string lastCharString = fullPath.Substring (fullPath.Length-1);
char lastChar = lastCharString[0];

if (lastChar == Path.DirectorySeparatorChar) {
    fullPath = fullPath.Substring(0, fullPath.Length-1);
}

Answer 1

fullPath = fullPath.TrimEnd(Path.DirectorySeparatorChar);

Answer 2

// If the fullPath is not a root directory
if (Path.GetDirectoryName(fullPath) != null)
    fullPath = fullPath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);

Answer 3

while(fullPath.EndsWith(Path.DirectorySeparatorChar.ToString())){
   fullPath = fullPath.Substring(0, fullPath.Length-1);
}

Answer 4

string path1 =  @"c:\directory\";
string path2 = @"c:\directory\file.txt";
string path3 = @"c:\directory";

Console.WriteLine(Path.Combine(Path.GetDirectoryName(path1), Path.GetFileName(path1)));
Console.WriteLine(Path.Combine(Path.GetDirectoryName(path2), Path.GetFileName(path2)));
Console.WriteLine(Path.Combine(Path.GetDirectoryName(path3), Path.GetFileName(path3)));

给出：

c:\directory
c:\directory\file.txt
c:\directory

希望它有所帮助。

Answer 5

fullPath = Path.GetFileName(
    fullPath.Split(
        new [] { Path.DirectorySeparatorChar }, 
        StringSplitOptions.RemoveEmptyEntries
    ).Last()
)

Answer 6

基于 Marino Šimić's answer and Dima's comment ，这里是一个不会在 C: 和 C:\ 上失败的解决方案：

var newPath = Path.Combine(Path.GetDirectoryName(oldPath) ?? oldPath, Path.GetFileName(oldPath));

如果是带有C＃的DirectorySeparatorChar，请删除最后一个字符

6 个答案: