在C#的工程里面如何截取应用程序自己的界面尼？

Question

我想截取应用程序自己的界面，在C#的代码里面有方法可以做到吗？

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Answer 1

目前没有发现有相关的方法。

WebView的话就可以通过WebViewBrush截图，但保存不到本地，也在寻找相关的解决方法。

Answer 2

C++的api是可以做到的。

在下载的sample里面有这个例子。

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Answer 3

http://social.msdn.microsoft.com/Forums/en-US/winappswithcsharp/thread/63dd9596-bf94-440b-847a-961cbf036e7b/

截屏不在支持范围内。

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MSDN Community Support | Feedback to us

Answer 4

哪个sample？

Answer 5

    class CaptureScreen
    {
        public static void startCS()
        {
            DoWorkAsync();
        }

        private async static void DoWorkAsync()
        {
             var response = await Task<string>.Factory.StartNew(() =>
             {
                 // Time consuming task (data is still accessible here)
                 PrintScreen();
                 return "ok";
             });
             // Completion task (data is still accessible here)
             if (response == "ok")
             {
                 SaveCapturePIC();
             }
        } 

        public static void PrintScreen()
        {
            CaptureApi.keybd_event((byte)0x2c, 0, 0, 0);//keydown
            CaptureApi.keybd_event((byte)0x2c, 0, 2, 0);//keyup
        }

        public class CaptureApi
        {

            [DllImport("user32.dll")]

             public static extern void keybd_event(

             byte bVk,// 虛擬鍵值

             byte bScan,// 硬體掃描碼

             int dwFlags,// 動作標識

             int dwExtraInfo// 與鍵盤動作關聯的輔助訊息

            );
        }

        public async static void SaveCapturePIC()
        {
            // Get the bitmap and display it.
            var dataPackageView = Clipboard.GetContent();
            if (dataPackageView.Contains(StandardDataFormats.Bitmap))
            {
                IRandomAccessStreamReference imageReceived = null;
                try
                {
                    //獲取DataPackageView
                    imageReceived = await dataPackageView.GetBitmapAsync();
                }
                catch (Exception ex)
                {
                    Debug.WriteLine("從剪貼板中檢索圖像錯誤: " + ex.Message);
                }

                using (var sourceStream = await imageReceived.OpenReadAsync())
                {
                    BitmapDecoder decoder = await BitmapDecoder.CreateAsync(sourceStream);
                    BitmapTransform transform = new BitmapTransform() { ScaledHeight = decoder.PixelHeight, ScaledWidth = decoder.PixelWidth };
                    PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
                        BitmapPixelFormat.Rgba8,
                        BitmapAlphaMode.Straight,
                        transform,
                        ExifOrientationMode.RespectExifOrientation,
                        ColorManagementMode.DoNotColorManage);

                    StorageFolder pictureFolder = KnownFolders.PicturesLibrary;
                    StorageFile destinationFile = await pictureFolder.CreateFileAsync("test.png", CreationCollisionOption.ReplaceExisting);
                    using (var destinationStream = await destinationFile.OpenAsync(FileAccessMode.ReadWrite))
                    {
                        BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, destinationStream);
                        encoder.SetPixelData(BitmapPixelFormat.Rgba8, BitmapAlphaMode.Premultiplied, decoder.PixelWidth, decoder.PixelHeight, 96, 96, pixelData.DetachPixelData());
                        await encoder.FlushAsync();
                    }
                }
            }
            else
            {
                Debug.WriteLine("剪貼板中的圖片格式不可用");
            }
        }
    }

截屏用此段程序，已实际试过是可用的。

Answer 6

此代码中使用了  keybd_event http://msdn.microsoft.com/en-us/library/windows/desktop/ms646304(v=vs.85).aspx 为 desktop apps only

虽然你可以在本地实现其功能，但是无法通过WACK的Testing, 不能被应用商店接受，使用了非支持的API是不被接受的。这里列出了支持的 Win32 and COM API http://msdn.microsoft.com/en-us/library/windows/apps/br205757.aspx  出这些外，使用其他API会造成通不过WACK测试。

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Bob Bao [MSFT]
MSDN Community Support | Feedback to us

Answer 7

DX2 里面有截屏的例子呢