Saving image: A generic error occurred in GDI+. (vb.net)

I need to save an image after opening it in from an OFD. This is my code atm:

Dim ofd As New OpenFileDialog
ofd.Multiselect = True
ofd.ShowDialog()


For Each File In ofd.FileNames
   Image.FromFile(File).Save("C:\Users\Jonathan\Desktop\e\tmp.png", Imaging.ImageFormat.png)
Next

And on the line Image.FromFile(File).Save("C:\Users\Jonathan\Desktop\开发者_StackOverflow社区e\tmp.png", Imaging.ImageFormat.png) it comes up with the error.

(note: the application will be built on so that's just my first code and it will need to be saved not copied)

I'd check two things:

1. That the directory you're saving to exists
2. That you have write permissions to this directory

Opening or saving an Image puts a lock on the file. Overwriting this file requires you to first call Dispose() on the Image object that holds the lock.

I don't really understand your code but you'd have to do it this way:

    For Each File In ofd.FileNames
        Using img As Image = Image.FromFile(File)
            img.Save("C:\Users\Jonathan\Desktop\e\tmp.png", Imaging.ImageFormat.Png)
        End Using
    Next

The Using statement ensures that the img object is disposed and the file lock is released.

The Image puts a lock.

For example, i used this buffer images to save in to a memorystream.

byte[] ImageData = new Byte[0];
if (BackGroundImage != null)
    {
        Bitmap BufferImage = new Bitmap(BackGroundImage);
        MemoryStream ImageStream = new MemoryStream();
        BufferImage.Save(ImageStream, ImageFormat.Jpeg);
        BufferImage.Dispose();
        ImageData = ImageStream.ToArray();
        ImageStream.Dispose();


        //write the length of the image data...if zero, the deserialier won't load any image
        DataStream.Write(ImageData.Length);
        DataStream.Write(ImageData, 0, ImageData.Length);
    }
    else
    {
        DataStream.Write(ImageData.Length);
    }

One reason of this is that the stream (MemoryStream or any other stream) that you have loaded the main image from has been disposed!

Such this case:

This is an extension method that converts a byte array to a bitmap, but using statement will dispose the memory stream, this will cause this error always:

    public static Bitmap ToBitmap(this byte[] bytes)
    {
        if (bytes == null)
        {
            return null;
        }
        else
        {
            using(MemoryStream ms = new MemoryStream(bytes))
            {
                return new Bitmap(ms);
            }
        }
    }