Image being saved from canvas is not rendered properly

浪子不回头ぞ 提交于 2019-12-06 00:39:16

The params to the SetPixelData method are incorrect.

encoder.SetPixelData(BitmapPixelFormat.Bgra8,
                         BitmapAlphaMode.Ignore,
                         (uint)element.Width, (uint)element.Height,
                         96, 96, bytes);

Change them to the follow can make it work.

encoder.SetPixelData(BitmapPixelFormat.Bgra8,
                BitmapAlphaMode.Ignore,
                (uint)renderTargetBitmap.PixelWidth,
                (uint)renderTargetBitmap.PixelHeight,
                DisplayInformation.GetForCurrentView().LogicalDpi,
                DisplayInformation.GetForCurrentView().LogicalDpi,
                bytes);

You can download the XAML render to bitmap sample from MSDN for reference.

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