Cross-platform file name handling in .NET Core
How to handle file name in System.IO
classes in a cross-platform manner to make it work on Windows and Linux?
For example, I write this code that works perfectly on Windows, however it doesn't create a file on Ubuntu Linux:
var tempFilename = $@"..\Data\uploads\{filename}";
using (FileStream fs = System.IO.File.Create(tempFilename))
{
file.CopyTo(fs);
fs.Flush();
}
Solution 1:
You can also use Path.DirectorySeparatorChar as below:
Console.WriteLine("..{0}Data{0}uploads{0}{{filename}}", Path.DirectorySeparatorChar);
Reference: MSDN
Solution 2:
Windows using Backslash. Linux using Slash. Path.Combine set the right symbol :
Path.Combine Method - MSDN
Solution 3:
Lots of good answers. I would just like to add that one can avoid having to specify the directory separator character by using Path.Combine
Example with the file relatively located at ".\..\toto\app.config":
Path.Combine("..", "toto", "app.config");
Unfortunately, Path.Combine does not resolve a relative path to an absolute Path in .Net Core. Path.GetFullPath is here for that:
Path.GetFullPath(Path.Combine("..", "toto", "app.config"))
Solution 4:
You can simply use slashes. Relative paths will work identically, and absolute paths can only be relative to the root of the main drive (as absolute paths starting with "c:" are not portable)