OutOfMemory exception when loading an image in .Net
Im loading an image from a SQL CE db and then trying to load that into a PictureBox.
I am saving the image like this:
if (ofd.ShowDialog() == DialogResult.OK)
{
picArtwork.ImageLocation = ofd.FileName;
using (System.开发者_如何学JAVAIO.FileStream fs = new System.IO.FileStream(ofd.FileName, System.IO.FileMode.Open))
{
byte[] imageAsBytes = new byte[fs.Length];
fs.Read(imageAsBytes, 0, imageAsBytes.Length);
thisItem.Artwork = imageAsBytes;
fs.Close();
}
}
and then saving to the Db using LINQ To SQL.
I load the image back like so:
using (FileStream fs = new FileStream(@"C:\Temp\img.jpg", FileMode.CreateNew ,FileAccess.Write ))
{
byte[] img = (byte[])encoding.GetBytes(ThisFilm.Artwork.ToString());
fs.Write(img, 0, img.Length);
}
but am getting an OutOfMemoryException. I have read that this is a slight red herring and that there is probably something wrong with the filetype, but i cant figure what.
Any ideas?
Thanks picArtwork.Image = System.Drawing.Bitmap.FromFile(@"C:\Temp\img.jpg");
Based on the code you provided it seems like you are treating the image as a string, it might be that data is being lost with the conversion from byte[] to string and string to byte[].
I am not familiar with SQL CE, but if you can you should consider treating the data as a byte[] and not encoding to and from string.
I base my assumption in this line of code
byte[] img = (byte[])encoding.GetBytes(ThisFilm.Artwork.ToString());
The GDI has the bad behavior of throwing an OOM exception whenever it is not capable of understanding a certain image format. Use Irfanview to see what kind of image that really is, it is likely GDI can't handle it.
My advice would be to not use a FileStream to load images unless you need access to the raw bytes. Instead, use the static methods provided in Bitmap or Image objects:
Image img = Image.FromFile(@"c:\temp\img.jpg")
Bitmap bmp = Bitmap.FromFile(@"c:\temp\img.jpg")
To save the file use .Save method of the Image or Bitmap object:
img.Save(@"c:\temp\img.jpg")
bmp.Save(@"c:\temp\img.jpg")
Of course we don't know what type ArtWork
is. Would you care to share that information with us?
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