[英]Path.Combine two relative path strings to create new relative path
[英]Path.Combine absolute with relative path strings
我正在尝试使用Path.Combine
将 Windows 路径与相对路径连接起来。
但是, Path.Combine(@"C:\blah",@"..\bling")
返回C:\blah\..\bling
而不是C:\bling\
。
有谁知道如何在不编写我自己的相对路径解析器的情况下完成此操作(应该不会太难)?
什么有效:
string relativePath = "..\\bling.txt";
string baseDirectory = "C:\\blah\\";
string absolutePath = Path.GetFullPath(baseDirectory + relativePath);
(结果:absolutePath="C:\bling.txt")
什么不起作用
string relativePath = "..\\bling.txt";
Uri baseAbsoluteUri = new Uri("C:\\blah\\");
string absolutePath = new Uri(baseAbsoluteUri, relativePath).AbsolutePath;
(结果:absolutePath="C:/blah/bling.txt")
在组合路径http://msdn.microsoft.com/en-us/library/system.io.path.getfullpath.aspx 上调用 Path.GetFullPath
> Path.GetFullPath(Path.Combine(@"C:\blah\",@"..\bling"))
C:\bling
(我同意 Path.Combine 应该自己做)
Path.GetFullPath(@"c:\windows\temp\..\system32")?
对于 windows 通用应用Path.GetFullPath()
不可用,您可以使用System.Uri
class 代替:
Uri uri = new Uri(Path.Combine(@"C:\blah\",@"..\bling"));
Console.WriteLine(uri.LocalPath);
这将为您提供您所需要的(路径不必存在才能工作)
DirectoryInfo di = new DirectoryInfo(@"C:\blah\..\bling");
string cleanPath = di.FullName;
Path.GetFullPath()
不适用于相对路径。
这是适用于相对路径和绝对路径的解决方案。 它适用于 Linux + Windows 并且它保留..
正如文本开头预期的那样(在 rest 处它们将被标准化)。 该解决方案仍然依赖于Path.GetFullPath
通过一个小的解决方法来进行修复。
这是一个扩展方法,所以像text.Canonicalize()
一样使用它
/// <summary>
/// Fixes "../.." etc
/// </summary>
public static string Canonicalize(this string path)
{
if (path.IsAbsolutePath())
return Path.GetFullPath(path);
var fakeRoot = Environment.CurrentDirectory; // Gives us a cross platform full path
var combined = Path.Combine(fakeRoot, path);
combined = Path.GetFullPath(combined);
return combined.RelativeTo(fakeRoot);
}
private static bool IsAbsolutePath(this string path)
{
if (path == null) throw new ArgumentNullException(nameof(path));
return
Path.IsPathRooted(path)
&& !Path.GetPathRoot(path).Equals(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal)
&& !Path.GetPathRoot(path).Equals(Path.AltDirectorySeparatorChar.ToString(), StringComparison.Ordinal);
}
private static string RelativeTo(this string filespec, string folder)
{
var pathUri = new Uri(filespec);
// Folders must end in a slash
if (!folder.EndsWith(Path.DirectorySeparatorChar.ToString())) folder += Path.DirectorySeparatorChar;
var folderUri = new Uri(folder);
return Uri.UnescapeDataString(folderUri.MakeRelativeUri(pathUri).ToString()
.Replace('/', Path.DirectorySeparatorChar));
}
小心反斜杠,不要忘记它们(不要使用两次:)
string relativePath = "..\\bling.txt";
string baseDirectory = "C:\\blah\\";
//OR:
//string relativePath = "\\..\\bling.txt";
//string baseDirectory = "C:\\blah";
//THEN
string absolutePath = Path.GetFullPath(baseDirectory + relativePath);
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.