如何从C＃中的特定目录加载图像？

Question

I would like to load an image from a directory "../MyAppFolder/Logos".

My code:

 Bitmap bmp = new Bitmap(@"/Logos/bitmap.bmp");
 pictureBox1.Image = bmp;

This code doesn't work. When I use (@"/Bitmapx.bmp") it works, but when I want to load an image from a deeper directory I get an error message.

What am I doing wrong?

Answer 1

The leading slash targets the current drive root. Use the realative path...

Bitmap bmp = new Bitmap(@"Logos/bitmap.bmp"); 

..Or one of the many Path. methods to resolve the full path that you want.

and yes I know my example above targets the current working path... that would be why I added the above comment. And for the pointless downvoter you might like to learn that current versions of Windows don't care which slash you use.

Answer 2

Try this:

string myLogo = System.IO.Path.Combine(Application.StartupPath, @"Logos\bitmap.bmp");
Bitmap bmp = new Bitmap(myLogo);
pictureBox1.Image = bmp;

And make sure your Logos folder is in your application root folder.

Answer 3

The first character of your path is / which makes this path relative to the root level of the drive on which the current working directory lives. But you probably want a relative path so just remove the initial / .

What's more, relative paths are relative to the working directory. But the working directory is not necessarily the application directory. For example, if you navigate in a file dialog that can change your working directory.

If I were you I would probably pre-pend the path with the app directory and make it a fully-specified absolute path, exactly as HABJAN suggests.