将UWP WriteableBitmap转换为XamarinForms图像 [英] Convert UWP WriteableBitmap to XamarinForms Image

问题描述

是否可以将UWP WriteableBitmap转换为XamarinForms图像?尝试进行简单转换最终会导致无法将类型WriteableBitmap类型隐式转换为Xamarin Forms Image".

is there a way to convert a UWP WriteableBitmap to a XamarinForms Image? Trying a simple convert ends up with "cannot implicitly convert type WriteableBitmap to Xamarin Forms Image".

我是否必须先将其转换为base64字符串?还是您将如何处理?

Do I have to convert it before to a base64 string? Or how would you handle that?

谢谢

推荐答案

您可以找到 DependencyService .并将其转换为PCL中的ImageSource.

You could find FromStream method in the Xamarin.Forms.ImageSource. For your requirement, you could get stream of WriteableBitmap form uwp project via DependencyService. And converter it to ImageSource in the PCL.

示例:

界面

public interface IStreamToImage
{
    Task GetStreamFormUWP(Action<Stream> StreamBlock);
}

实施

public async Task GetStreamFormUWP(Action<Stream> StreamBlock)
{ 
    await Window.Current.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async() => {

       .......

       using (Stream stream = MyBitmap.PixelBuffer.AsStream()){
       await stream.WriteAsync(sourcePixels, 0, sourcePixels.Length);
       StreamBlock(stream);
    }
 });
}

用法

await DependencyService.Get<IStreamToImage>().GetStreamFormUWP( (stream) =>
{          
    image.Source = ImageSource.FromStream(() => stream);
});

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