c# - UIElement 屏幕截图 UWP - C#

Question

我在网络上搜索但我没有找到任何解决方案来截取 UWP - 通用 Windows 平台中的 UI 元素(以位图为例)。

Answer 1

您可以使用 Render XAML 来绘制位图这里有一些示例代码:

    // Render to an image at the current system scale and retrieve pixel contents
    RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap();
    await renderTargetBitmap.RenderAsync(RenderedGrid);
    var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();

    var savePicker = new FileSavePicker();
    savePicker.DefaultFileExtension = ".png";
    savePicker.FileTypeChoices.Add(".png", new List<string> { ".png" });
    savePicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
    savePicker.SuggestedFileName = "snapshot.png";

    // Prompt the user to select a file
    var saveFile = await savePicker.PickSaveFileAsync();

    // Verify the user selected a file
    if (saveFile == null)
        return;

    // Encode the image to the selected file on disk
    using (var fileStream = await saveFile.OpenAsync(FileAccessMode.ReadWrite))
    {
        var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, fileStream);

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

        await encoder.FlushAsync();
    }

示例 https://code.msdn.microsoft.com/windowsapps/XAML-render-to-bitmap-dd4f549f