Problems Overwriting (Re-Saving) Image When It Was Set as Image Source

Problems overwriting (re-saving) image when it was set as image source

You're almost there.

• Using BitmapCacheOption.OnLoad was the best solution to keep your file from being locked.

• To cause it to reread the file every time you also need to add BitmapCreateOptions.IgnoreImageCache.

Adding one line to your code should do it:

  imgTemp.CreateOption = BitmapCreateOptions.IgnoreImageCache;

thus resulting in this code:

  uriSource = new Uri(Combine(imagesDirectoryTemp, generatedFileName), UriKind.Absolute);
  imgTemp = new BitmapImage();
  imgTemp.BeginInit();
  imgTemp.CacheOption = BitmapCacheOption.OnLoad;
  imgTemp.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
  imgTemp.UriSource = uriSource;
  imgTemp.EndInit();
  imgAsset.Source = imgTemp;

Overwrite Existing Image

You must remove your image if that is already exists.

private void saveImage()
    {
        Bitmap bmp1 = new Bitmap(pictureBox.Image);

       if(System.IO.File.Exists("c:\\t.jpg"))
              System.IO.File.Delete("c:\\t.jpg");

        bmp1.Save("c:\\t.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
        // Dispose of the image files.
        bmp1.Dispose();
    }

updating an image in an image control

thank you all for your input coz through them i finally figure a way around this. so my xaml still remains bound as <Image Source="{Binding Chart}" Margin="0 0 0 0"/> but in the code behind i changed the class property chart to return a bitmap as shown below:

  private BitmapImage image = null;

    public BitmapImage Chart
    {
        get
        {
            return image;
        }
        set
        {
            if (value != image)
            {
                image = value;
                NotifyPropertyChanged("Chart");

            }

        }
    }

this class mind you implements INotifyPropertyChanged . at the point where i set the image i am now using this code:

BitmapImage img = new BitmapImage();
img.BeginInit();
img.CacheOption = BitmapCacheOption.OnLoad;
img.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
//in the following code path is a string where i have defined the path to file
img.UriSource = new Uri(string.Format("file://{0}",path));
img.EndInit();
c.Chart = img;

this works well for me and refreshes the image upon update.

Image file locked after loading in WPF

dlev had a good advice. Here you see the cache option that should solve it: Problems overwriting (re-saving) image when it was set as image source

imgTemp.CreateOptions = BitmapCreateOptions.IgnoreImageCache;

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