![]() For an image in a vertical StackLayout, HeightRequest should be avoided. You can also set the HeightRequest to make the image sizes consistent on the platforms, but the constrained width of the bitmap will limit the versatility of this technique. It's often desirable to size bitmaps consistently among all the platforms.Įxperimenting with StackedBitmap, you can set a WidthRequest on the Image element in a vertical StackLayout to make the size consistent among the platforms, but you can only reduce the size using this technique. ![]() This class only loads resources from the assembly in which it's located, so it can't be placed in a library. A markup extension named ImageResourceExtension helps to reference the embedded resource in XAML. The StackedBitmap sample puts an Image in a vertical StackLayout in XAML. On most devices, each bitmap pixel occupies multiple screen pixels. On Universal Windows Platform, the Image is the pixel size of the bitmap in device-independent units.There is a one-to-one mapping between bitmap pixels and screen pixels. On iOS and Android, the Image is the pixel size of the bitmap.The Image and the bitmap are the same size: The program sets the VerticalOptions and HorizontalOptions properties of the Image to LayoutOptions.Center, which makes the Image element unconstrained. The resource name passed to the method consists of the assembly name, followed by a dot, followed by the optional folder name and a dot, followed by the filename. The ResourceBitmapCode sample demonstrates how to use ImageSource.FromResource to load the file. Give it a Build Action of EmbeddedResource. You can add a bitmap file to a PCL, or to a folder in the PCL. AspectFill: fills area but respects aspect ratio, accomplished by cropping part of the bitmap.Fill: fills area, does not respect aspect ratio.AspectFit: respects aspect ratio (default).You can control how the bitmap is stretched by setting the Aspect property of the Image to one of the following members of the Aspect enumeration: The conversion is handled by the ImageSourceConverter class. The WebBitmapXaml sample is similar but simply sets the Source property to the URL. ![]() Areas of the Image beyond the bitmap can be colored with BackgroundColor. Regardless of the bitmap's size, a constrained Image element is stretched to the size of its container, and the bitmap is displayed in its maximum size within the Image element while maintaining the bitmap's aspect ratio. The Image element is set to the Content property of the ContentPage, so it is constrained to the size of the page. The WebBitmapCode project loads a bitmap over the web using ImageSource.FromUri. StreamImageSource is useful for the asynchronous loading of Stream objects, whereas ImageSource.FromStream is synchronous. The FileImageSource class is useful in XAML. The UriImageSource class is useful if you need to control caching. There is no class equivalent of the Image.FromResource methods.
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