File.Copy and WPF

Question

hi to everyone, i have a little problem with the File.Copy method in WPF, my code is very simple and i get an exception when i run it, << Could not find a part of the path 'Images\37c31987-52ee-4804-8601-a7b9b4d439fd.png'. >>, where Images is a relative folder.
here is my code, as i said simple and the same code works fine in a console application, no problem at all.

string filenamae = System.IO.Path.Combine(images, Guid.NewGuid().ToString() + System.IO.Path.GetExtension(imageFile)); ;
System.IO.File.Copy(imageFile, filenamae);
this.ImageLocation = string.Empty;

so if any can help, thanks.

Answer 1

Does the images folder exist? File.Copy doesn't create it automatically.

Do you know what your current directory is? File open/save boxes can change that. So it's always safer to work with absolute paths.

Do a

Path.GetFullPath(filename)

and see where that points to. Is it the right location?

Answer 2

If you use the absolute instead of the relative path, does it work then?

Answer 3

Do you have a debugger? Why not insert a breakpoint and check the values used at each step?

If the file system says "cannot find file", I wouldn't bother arguing with it...

Answer 4

Before you access a file, you should call System.IO.File.Exists(). It's not clear from your error description if the origin file exists or not before the copy.

If you don't specify an absolute path, your relative path with often be resolved from unexpected places, usually the current working directory of the process. Calling this method may tell you were the process is currently running:

System.IO.Directory.GetCurrentDirectory()

You should never make assumptions about the current working directory of a running process as the user could start your program from anywhere. Even if you think you always control the current working directory, you will be surprised how often you will be wrong.