How can I obtain the case-sensitive path on Windows?

Question

I need to know which is the real path of a given path.

For example:

The real path is: d:\src\File.txt
And the user give me: D:\src\file.txt
I need as a result: d:\src\File.txt

Answer 1

You can use this function:

[DllImport("kernel32.dll", SetLastError=true, CharSet=CharSet.Auto)] static extern uint GetLongPathName(string ShortPath, StringBuilder sb, int buffer);  [DllImport("kernel32.dll")] static extern uint GetShortPathName(string longpath, StringBuilder sb, int buffer);   protected static string GetWindowsPhysicalPath(string path) {         StringBuilder builder = new StringBuilder(255);          // names with long extension can cause the short name to be actually larger than         // the long name.         GetShortPathName(path, builder, builder.Capacity);          path = builder.ToString();          uint result = GetLongPathName(path, builder, builder.Capacity);          if (result > 0 && result < builder.Capacity)         {             //Success retrieved long file name             builder[0] = char.ToLower(builder[0]);             return builder.ToString(0, (int)result);         }          if (result > 0)         {             //Need more capacity in the buffer             //specified in the result variable             builder = new StringBuilder((int)result);             result = GetLongPathName(path, builder, builder.Capacity);             builder[0] = char.ToLower(builder[0]);             return builder.ToString(0, (int)result);         }          return null; }