6

我的目标是在 WPF 窗口上以重写的 OnRender 方法绘制图像“someImage.png”,它是嵌入式资源:

protected override void OnRender(System.Windows.Media.DrawingContext drawingContext)
{
    base.OnRender(drawingContext);            
    drawingContext.DrawImage(ImageSource, Rect);            
}

我找到了将图像从资源中获取到 Stream 的代码:

public BitmapSource GetSourceForOnRender()
{
    System.Reflection.Assembly myAssembly = System.Reflection.Assembly.GetExecutingAssembly();
    Stream myStream = myAssembly.GetManifestResourceStream("KisserConsole.someImage.png");

    // What to do now?

    return //BitmapSource    

}

但是我现在如何获取或创建 BitmapSource?

4

2 回答 2

12

StreamSource您可以通过设置其属性从流中创建 BitmapImage :

public BitmapSource GetSourceForOnRender()
{
    var assembly = System.Reflection.Assembly.GetExecutingAssembly();
    var bitmap = new BitmapImage();

    using (var stream =
        assembly.GetManifestResourceStream("KisserConsole.someImage.png"))
    {
        bitmap.BeginInit();
        bitmap.StreamSource = stream;
        bitmap.CacheOption = BitmapCacheOption.OnLoad;
        bitmap.EndInit();
    }

    return bitmap;    
}

也就是说,您通常会从Resource File Pack URI创建一个 BitmapImage ,例如

new BitmapImage(new Uri(
    "pack://application:,,,/KisserConsole.someImage.png"));
于 2015-03-22T18:28:29.163 回答
3

你可以尝试使用这个:

Uri uri = new Uri( $"pack://application:,,,/YourAssemblyName;component/Resources/images/photo.png", UriKind.Absolute );

BitmapImage bitmap = new BitmapImage( uri );

确保图像文件的 Build Action 设置为 Resource。

于 2018-08-04T02:58:00.603 回答