How to delete file opened by a Canvas

Question

hello guys, I'm opening a .bmp image created on a folder on a InkCanvas to draw on like below. And when i'm closing it i want the TempFile to be deleted. but when i try to delete it says the file is used by another process . is there anyway to do this? I'm using WPF C#. Please help me out. Thanks you! :) img = new BitmapImage( new Uri(TempFile, UriKind.Relative)); myImageBrush = new ImageBrush(img); myCanvas = new Canvas(); myCanvas.Width = img.Width; myCanvas.Height = img.Height; myCanvas.Background = myImageBrush; cw.ImgPO.Height = img.Height; cw.ImgPO.Children.Add(myCanvas);

Amit Gupta · Answer

I think you have done just a copypaste, understand the code before implementing it. The final code of yours is here //img = new BitmapImage(new Uri(TempFile, UriKind.Relative)); img = GetBitmap( new Uri(TempFile)); myImageBrush = new ImageBrush(img); myCanvas = new Canvas(); myCanvas.Width = img.Width; myCanvas.Height = img.Height; myCanvas.Background = myImageBrush; cw.ImgPO.Height = img.Height; cw.ImgPO.Children.Add(myCanvas); public BitmapImage GetBitmap(Uri src) { var bmp = new BitmapImage(); var stream = File.OpenRead(src.AbsolutePath); bmp.BeginInit(); bmp.CacheOption = BitmapCacheOption.OnLoad(); bmp.StreamSource = stream; bmp.EndInit(); stream.Close(); stream.Dispose(); return bmp; } Do let me know if it works.

Amit Gupta · Answer

Hey Instead of loading and working directly with images, load it in a cache memory and then play with your stuffs. Look at the reference https://stackoverflow.com/questions/22499407/how-to-display-a-bitmap-in-a-wpf-image

Lahiru Mahagamage · Answer

small changes were made on the below code given by @Amit Gupta img = GetBitmap(TempFile); myImageBrush = new ImageBrush(img); myCanvas = new Canvas(); myCanvas.Width = img.Width; myCanvas.Height = img.Height; myCanvas.Background = myImageBrush; cw.ImgPO.Height = img.Height; cw.ImgPO.Children.Add(myCanvas); public BitmapImage GetBitmap ( string src) { var bmp = new BitmapImage(); var stream = File.OpenRead(src); bmp.BeginInit(); bmp.CacheOption = BitmapCacheOption .OnLoad; bmp.StreamSource = stream; bmp.EndInit(); stream.Close(); stream.Dispose(); return bmp; }

Lahiru Mahagamage · Answer

@Amit Gupta I did that and how can i get the height of the Canvas. When did the above code i could call the height from canvas.height but now the height wont wont come when i use this code with the above and still the using error occurs :( BitmapImage BitmapToImageSource(Bitmap bitmap) { using (MemoryStream memory = new MemoryStream()) { bitmap.Save(memory, System.Drawing.Imaging.ImageFormat.Bmp); memory.Position = 0; BitmapImage bitmapimage = new BitmapImage(); bitmapimage.BeginInit(); bitmapimage.StreamSource = memory; bitmapimage.CacheOption = BitmapCacheOption.OnLoad; bitmapimage.EndInit(); return bitmapimage; } } img = new Bitmap(TempFile); myImageBrush = new ImageBrush(BitmapToImageSource(img)); myCanvas = new Canvas(); myCanvas.Width = img.Width; myCanvas.Height = img.Height; myCanvas.Background = myImageBrush; cw.ImgDel.Height = img.Height; cw.ImgDel.Children.Add(myCanvas);

Lahiru Mahagamage · Answer

did that but that didn't work

Laxmidhar Sahoo · Answer

sir Do you mean canvas.Children.Clear();

How to delete file opened by a Canvas

Answers (6)