what is metro class for WriteableBitmap

Question

Hi ,

I have done below coding for windwos 7 mobile application  for downloading  images ,can u please tell me  what is metro class for  below coding?

  WriteableBitmap wbSource = new WriteableBitmap(tempImage);
                            MemoryStream newStream = new MemoryStream();
                            wbSource.SaveJpeg(newStream, tempImage.PixelWidth, tempImage.PixelHeight, 0, 100);
                            image.SetSource(newStream);

Thanks

Sutahahr.j

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Thanks Suthahar.J

Answer 1

It depends on what you are doing. What is tempImage?

The Windows.UI.Xaml.Media.Imaging.WriteableBitmap class can be loaded from a stream with SetSource, but it cannot be loaded from another BitmapSource (unfortunately there isn't a way for Windows Store apps to render Xaml UIElements into bitmaps).

Once you have the image in the WritableBitmap (or in a BitmapImage) you don't need to extract the stream to put it in an Image. You can set that directly:

            BitmapImage bmp = new BitmapImage(new Uri("http://i.s-microsoft.com/global/ImageStore/PublishingImages/logos/hp/logo-lg-1x.png")); 
            img.Source = bmp;

--Rob

 

        

Answer 2

Hi, Thanks above coding is working fine but my question is below i am trying to set an image in a Windows Store Apps , The url where the image is located required Authenticator, i have a valid username and password, but i have no idea how to load the image with authenticated URl

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Thanks Suthahar.J

Answer 3

Hi Suthahar,

It depends on what you mean by an authenticated URI. What sort of authentication is required? Take a look at the Web authentication broker for a way to handle some standard authentication schemes.

--Rob