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I am using WPF application and using c++ dll in that from c++ dll i will read the file and send the memory to WPF application Eg:-files like excel, pdf, word. how to view those files through memory. need to view through the memory only not to write in a file and then open, any idea's or suggestion i will follow

What I have tried:

public void updateImage()
imagearray // The memory which i get from c++
SlectedImage.Source = LoadImage(imagearray);//set the source Image to the Image controll

 public static BitmapImage LoadImage(byte[] imageData)
            if (imageData == null || imageData.Length == 0) return null;
            var image = new BitmapImage();

                using (var mem = new MemoryStream(imageData))
                    mem.Position = 0;
                    image.CreateOptions = BitmapCreateOptions.PreservePixelFormat;
                    image.CacheOption = BitmapCacheOption.OnLoad;
                    image.UriSource = null;
                    image.StreamSource = mem;


return image


this code will work for image as same how to achieve for the documents to view in wpf application thorugh memory.
Updated 8-Jul-21 4:50am

1 solution

It depends on how you're planning on rendering these documents. If you mean to render them within your WPF application then you're going to need some embeddable controls, which I would assume take a Stream reference to load the content.

However if you're thinking about opening Excel from a byte array in memory and having it load it as though it's a file on the local file system: that's not possible. Instead you should consider saving the content to a temporary file and then open that file.
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