bitmapimage

问题 BitmapImage B = new BitmapImage(); B.BeginInit(); B.StreamSource = asm.GetManifestResourceStream("WpfApplication26.Back1.png"); B.EndInit(); image1.Source = B; The size of the image (Back1.png) is 32*32, and I set the size of my image control to 32*32 and set the property "Scale" to "None". 回答1: Try RenderOptions.BitmapScalingMode="NearestNeighbor" on the image control in xaml or RenderOptions.SetBitmapScalingMode(image1, BitmapScalingMode.NearestNeighbor) in code. 回答2: Try

问题 Why when an ArgumentException occurs because image.jpg has an invalid metadata header does the first example catch the exception, and the second example does not? Example 1: try { Uri myUri = new Uri("http://example.com/image.jpg", UriKind.RelativeOrAbsolute); JpegBitmapDecoder decoder2 = new JpegBitmapDecoder(myUri, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default); BitmapSource bitmapSource2 = decoder2.Frames[0]; } catch (Exception ex) { MessageBox.Show(ex.Message); }

问题 I'm trying to merge multiple Images into one image. Problem is that most libraries with such functionality are not available in a Windows 8.1 App. I'd prefer to not have to use external libraries such as WriteableBitmapEx This is my current code which unfortunately doesn't work: int count = 4; int size = 150; WriteableBitmap destination = new WriteableBitmap(300, 300); BitmapFrame frame = await (await BitmapDecoder.CreateAsync(randomAccessStream)).GetFrameAsync(0); PixelDataProvider pixelData

问题 Image Property: public class SomeClass { public BitmapImage Image { get { BitmapImage src = new BitmapImage(); try { src.BeginInit(); src.UriSource = new Uri(ReceivedNews.Image, UriKind.Absolute); src.CacheOption = BitmapCacheOption.OnLoad; src.EndInit(); } catch { } return src; } private set { } } } And the test method is: [TestMethod] public void CanPropertyImage_StoresCorrectly() { string address = "http://images.freeimages.com/images/previews/083/toy-car-red-1417351.jpg"; var aSomeClass =

问题 I have a BitmapImage object, which already has its source etc set. I simply want to save it to my apps local storage folder, so that I can reference it at other points in the program. I just cannot figure out how to get it from object to file though! I've found solutions to similar problems for WP7, but its just not the same. Ive got as far as creating my image from a Base64 string (which works as I can load the image into a UI image viewer and see it) and have called it img , and I know I

问题 When I move a bitmap-filled path in Silverlight by updating its RenderTransform, the image updates with a stutter/jitter about every half-second. The Path uses a BitmapCache, and Hardware Acceleration is turned on. The hardware acceleration is verified using the EnableCacheVisualization option, and by observing that the frame rate is high ~ 60 fps. You can see what I am talking about here. It is a working silverlight app showing the stuttering behavior. (You might imagine what game I am

问题 I'm building a small app using C#/WPF. The application receives (from an unmanaged C++ library) a byte array (byte[]) from a bitmap source In my WPF window, I have an (System.windows.Controls.Image) image which I will use to display the bitmap. In the code behind (C#) I need to able to take that byte array, create BitmapSource /ImageSource and assign the source for my image control. // byte array source from unmanaged librariy byte[] imageData; // Image Control Definition System.Windows

问题 I'm building a small app using C#/WPF. The application receives (from an unmanaged C++ library) a byte array (byte[]) from a bitmap source In my WPF window, I have an (System.windows.Controls.Image) image which I will use to display the bitmap. In the code behind (C#) I need to able to take that byte array, create BitmapSource /ImageSource and assign the source for my image control. // byte array source from unmanaged librariy byte[] imageData; // Image Control Definition System.Windows

问题 How to get BitmapSource from BitmapImage? Or how to convert BitmapImage to BitmapFrame directly? It seems to me that if I have BitmapSource I could use BitmapFrame.Create and finally get BitmapFrame object from given BitmapImage 回答1: A BitmapImage inherits from BitmapSource so no conversion is needed 回答2: The BitmapImage inherits from BitmapSource as parapura said. Example: BitmapSource bitmapSource = new BitmapImage(); BitmapImage bitmapImage = bitmapSource as BitmapImage; Source:

问题 I can't find anything over this and need some help. I have loaded a bunch of images into memory as BitmapImage types, so that I can delete the temp directory that they were stored in. I have successfully done this part. Now I need to save the images to a different temp location and I can't figure out how to do this The images are contained in a: Dictionary<string, BitmapImage> The string is the filename. How do I save this collection to the new temp location? Thanks for any help! 回答1: You