从绝对uri读取流

Question

如何从绝对 uri 获取资源流。

当我运行下面的代码时，我在 sri 中得到 null。

StreamResourceInfo sri = Application.GetResourceStream(new Uri("http://----", UriKind.RelativeorAbsolute));
BitmapImage src = new BitmapImage();
src.SetSource(sri.Stream);
// Get WriteableBitmap
WriteableBitmap bitmap = new WriteableBitmap(src);

非常感谢任何帮助。

Answer 1

GetResourceStream 方法不适用于 http 请求。 See the documentation here.

Returns a resource file from a location in the application package.

uriResource Type: System.Uri A relative URI that identifies the resource file to be loaded. If the file has a Build Action of Content, the URI is relative to the application package and you should not use a leading forward slash. If the file has a Build Action of Resource, you can use a leading forward slash, but it is not required.

资源数据是编译成你的数据 assembly/package

基本上，您可以通过该方法加载两种类型的资源：

Files Embedded in the application assembly in the application package Uri("/Application;component/EmbeddedInApplicationAssembly.png")
应用程序包中包含的文件 Uri("IncludedInApplicationPackage.png");

您要找的是HttpClient

https://blogs.msdn.microsoft.com/bclteam/2013/02/18/portable-httpclient-for-net-framework-and-windows-phone/

从绝对uri读取流

Read stream from absolute uri

c#

windows-phone-8