"Parameter is not valid" - new Bitmap()

Question

_{Monday, April 21, 2008 9:45 AM}

Hello, I'm trying to make an Image from a file...

I am positive that this code worked a few compiles earlier, and having not changed this code I cannot see why it would suddenly stop working... suffice to say it has...

private void ofdImage_FileOk(object sender, CancelEventArgs e)

        {

            foreach (string fn in ofdImage.FileNames){

                if ((fn.EndsWith("jpg")) || (fn.EndsWith("jpeg")))

                {

                    addImgToRepo(fn);

                }

            }

        }

        private void addImgToRepo(string fn)

        {

            Image img = new System.Drawing.Bitmap(fn);

....

}

The code breaks on Image img = ... saying "The Parameter is not valid.". 

For example, I open C:\000.jpg and this gives the string fn = "C:\000.jpg". This file exists!

If anyone can shed any light on this I'd be most appreciative! It makes no sense to me!

All replies (4)

_{Tuesday, April 22, 2008 8:31 AM ✅Answered | 1 vote}

Hi,

The "Parameter is not valid" comes out because the file is and empty file that have 0 byte. 

You can use Image.Save() to save a picture into the file.

Code Snippet

             string imgPath = @"C:\test3.jpg";

            Image img = new Bitmap(imgPath);

            img.Save(@"C:\test3_copy.jpg", ImageFormat.Jpeg);

 If you wanna use File.copy(), just do as following.

Code Snippet

            string path = @"C:\test3.jpg";

            string path4 = @"C:\test4.jpg";

            try

            {

                // Ensure that the target does not exist.

                File.Delete(path4);

                // Copy the file.

                File.Copy(path, path4);

                MessageBox.Show(path+" has copied to "+ path4);

            }

For more about File.Copy(), please read the msdn File Class.

Wishes.

_{Monday, April 21, 2008 9:54 AM}

Turns out I had somehow written over the original files that I was using to test with a file of 0 bytes... clever!

Incidentally, that was because I was trying to copy an image using File.Copy()... from an example piece of code... it just wrote 0 bytes! Odd?

_{Monday, September 15, 2008 4:59 PM}

I have a very similar issue, except that the file is 250KB.  It exists, the path is fine, but for some reason it also crashes on the

What could be the reason?  This same line of code worked for hundreds of other pictures?! :s

Thanks,

Alain

_{Monday, September 15, 2008 5:27 PM}

I've tried using an "Image" object instead and it crashes again, for the same file, but this time I get an "Out of Memory" exception.  Here is the full code involving my img object (part of huge foreach loop):