如何编程捕捉屏幕的Windows Phone 8.1 SDK？ [英] How to capture screen programatically in windows phone 8.1 SDK?

问题描述

不知道如何从代码捕获屏幕在SDK 8.1的Windows Phone？对于Windows Phone的7.5我已经看到了代码，并试图使用，但是失败了。 （

Any Idea how to capture screen in SDK 8.1 windows phone from code? For windows phone 7.5 i have seen the code and tried to use, but it failed. :(

推荐答案

您可以使用 RenderTargetBitmap 并传递给它一个FrameworkElement的。表示页，然后呈现从一个位图

You can use a RenderTargetBitmap and pass it a FrameworkElement that represents the page and then render a bitmap from that.

private async Task<RenderTargetBitmap> CreateBitmapFromElement(FrameworkElement uielement)
{
    try
    {
        var renderTargetBitmap = new RenderTargetBitmap();
        await renderTargetBitmap.RenderAsync(uielement);

        return renderTargetBitmap;
    }
    catch (Exception ex)
    {
        System.Diagnostics.Debug.WriteLine(ex);
    }

    return null;
}

尝试这样的：

private async void ButtonBase_OnClick(object sender, RoutedEventArgs e)
{
    this.imagePreview.Source = await CreateBitmapFromElement(this);
}

在您的页面上的XAML是：

where the XAML on your page is:

<Grid x:Name="controlsGrid">
    <Button Click="ButtonBase_OnClick">take screenshot</Button>
    <Image x:Name="imagePreview"
           Height="200" VerticalAlignment="Bottom"
           Stretch="UniformToFill" />
</Grid>

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