用于位图图像的内存流增加了内存使用量

Question

I am using this function which convert thy byte array to image but when this function calls the memory usage of system increasing.This function can be called around 500 times.I tried to dispose or flush to make memory empty but usage still getting increases.I am attaching a task manager image which is showing memory usage.

public static BitmapImage ConvertToBitmapImage(byte[] imageData)
    {
        if (imageData == null || imageData.Length == 0) return null;
        var image = new BitmapImage();
        using (var mem = new MemoryStream(imageData))
        {
            mem.Position = 0;
            image.BeginInit();
            image.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
            image.CacheOption = BitmapCacheOption.OnLoad;
            image.UriSource = null;
            image.StreamSource = mem;
            image.EndInit();
            mem.Flush();
            mem.Dispose();
        }
       image.Freeze();
        return image;
    }

Task Manager screen shot

Answer 1

Don't do this:

using (var mem = new MemoryStream(imageData))
{
   ...         
   mem.Dispose();
}

You are already closing mem with using . Also mem.Position should be 0 by default. But that's not your problem.

Try Adding a Background Thread and check the process memory usage on a while loop, if it exceeds x then call GC.Collect() , so this Disposed elements get deallocated . Also after you're done doing whatever with the BitmapImage set it to null just in case.

image.CacheOption = BitmapCacheOption.OnLoad;

Maybe this line has something to do with memory usage, does BitmapCacheOption.Default make any difference?