计算相对文件路径
本文关键字:路径 文件 相对 计算 | 更新日期: 2023-09-27 18:21:48
我有两个文件:
C:'Program Files'MyApp'images'image.png
C:'Users'Steve'media.jpg
现在我想计算文件2(media.jpg)相对于文件1:的文件路径
..'..'..'Users'Steve'
.NET中是否有一个内置函数可以做到这一点?
使用:
var s1 = @"C:'Users'Steve'media.jpg";
var s2 = @"C:'Program Files'MyApp'images'image.png";
var uri = new Uri(s2);
var result = uri.MakeRelativeUri(new Uri(s1)).ToString();
没有内置的.NET,但有本机函数。这样使用:
[DllImport("shlwapi.dll", CharSet=CharSet.Auto)]
static extern bool PathRelativePathTo(
[Out] StringBuilder pszPath,
[In] string pszFrom,
[In] FileAttributes dwAttrFrom,
[In] string pszTo,
[In] FileAttributes dwAttrTo
);
或者,如果你仍然喜欢托管代码,那么试试这个:
public static string GetRelativePath(FileSystemInfo path1, FileSystemInfo path2)
{
if (path1 == null) throw new ArgumentNullException("path1");
if (path2 == null) throw new ArgumentNullException("path2");
Func<FileSystemInfo, string> getFullName = delegate(FileSystemInfo path)
{
string fullName = path.FullName;
if (path is DirectoryInfo)
{
if (fullName[fullName.Length - 1] != System.IO.Path.DirectorySeparatorChar)
{
fullName += System.IO.Path.DirectorySeparatorChar;
}
}
return fullName;
};
string path1FullName = getFullName(path1);
string path2FullName = getFullName(path2);
Uri uri1 = new Uri(path1FullName);
Uri uri2 = new Uri(path2FullName);
Uri relativeUri = uri1.MakeRelativeUri(uri2);
return relativeUri.OriginalString;
}