Path Combine absolute with relative path strings

Question

I m trying to join a Windows path with a relative path using Path Combine   However  Path Combine   C  blah       bling   returns C  blah    bling instead of C  bling    Does anyone know how to accomplish this without writing my own relative path resolver  which shouldn t be too hard

User · Answer

What Works   string relativePath        bling txt   string baseDirectory    C   blah     string absolutePath   Path GetFullPath baseDirectory   relativePath      result  absolutePath  C  bling txt     What doesn t work  string relativePath        bling txt   Uri baseAbsoluteUri   new Uri  C   blah      string absolutePath   new Uri baseAbsoluteUri  relativePath  AbsolutePath     result  absolutePath  C  blah bling txt

User · Answer

Path GetFullPath   c  windows temp    system32

User · Answer

For windows universal apps Path GetFullPath   is not available  you can use the System Uri class instead    Uri uri   new Uri Path Combine   C  blah        bling      Console WriteLine uri LocalPath

User · Answer

Call Path GetFullPath on the combined path http   msdn microsoft com en-us library system io path getfullpath aspx   gt  Path GetFullPath Path Combine   C  blah        bling    C  bling    I agree Path Combine ought to do this by itself

User · Answer

Be careful with Backslashes  don t forget them  neither use twice    string relativePath        bling txt   string baseDirectory    C   blah       OR    string relativePath          bling txt     string baseDirectory    C   blah     THEN string absolutePath   Path GetFullPath baseDirectory   relativePath

User · Answer

This will give you exactly what you need  path does NOT have to exist for this to work   DirectoryInfo di   new DirectoryInfo   C  blah    bling    string cleanPath   di FullName

User · Answer

Path GetFullPath   does not work with relative paths   Here s the solution that works with both relative   absolute paths  It works on both Linux   Windows and it keeps the    as expected in the beginning of the text  at rest they will be normalized   The solution still relies on Path GetFullPath to do the fix with a small workaround   It s an extension method so use it like text Canonicalize         lt summary gt          Fixes         etc      lt  summary gt  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           amp  amp   Path GetPathRoot path  Equals Path DirectorySeparatorChar ToString    StringComparison Ordinal           amp  amp   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

[c#] Path.Combine absolute with relative path strings

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