CODEWITHSUNDEEP
c#imagebitmap
mari Mir
mari Mir

Reputation: 39

How to delete an image file which is loaded on a datagridview C#?

I have a datagridview with an image column on my form and I set its value to an image in some folder ..

Bitmap PicImage;

PicImage = new Bitmap(ImagePath);
Grid.Rows[i].Cells["ImageColumn"].Value = PicImage;

when I want to delete the row ,the image should be deleted too, but I get "the process cannot access the file..." message :

File.delete(ImagePath);

How can I solve it?

Upvotes: 0

Views: 594

Answers (4)

HighwayRob
HighwayRob

Reputation: 139

The following code unlinked the datagridview from the image file.

Bitmap timage;
                using (Bitmap tmpImage = new Bitmap(tname))
                {
                    timage = new Bitmap(tmpImage.Width, tmpImage.Height, PixelFormat.Format32bppArgb);
                    using (Graphics gr = Graphics.FromImage(timage))
                        gr.DrawImage(tmpImage, new Rectangle(0, 0, timage.Width, timage.Height));
                }
                fileGridView.Rows[dgIndex].Cells["thumbNail"].Value = timage;

Upvotes: 0

Nyerguds
Nyerguds

Reputation: 5629

The cleanest method is to load it without any links to files or streams. If it's just for showing on a UI, the simplest way to do this without deep-cloning using LockBits is simply to paint it on a new 32BPP ARGB image:

Bitmap image;
using (Bitmap tmpImage = new Bitmap(filepath))
{
    image = new Bitmap(tmpImage.Width, tmpImage.Height, PixelFormat.Format32bppArgb);
    using (Graphics gr = Graphics.FromImage(image))
        gr.DrawImage(tmpImage, new Rectangle(0, 0, image.Width, image.Height));
}
// Bitmap "image" is now ready to use.

Upvotes: 0

HelenA
HelenA

Reputation: 96

Try first to unload the image from the Bitmap and then delete it.

Upvotes: 0

esiprogrammer
esiprogrammer

Reputation: 1438

Use a file stream to unlock the file , so instead of:

PicImage = new Bitmap(ImagePath);

use:

using (var stream= new System.IO.FileStream(ImagePath, System.IO.FileMode.Open))
{
    var bmp= new Bitmap(stream);
    PicImage  = (Bitmap) bmp.Clone();
}

Upvotes: 1

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