ウィンドウズストアアプリでスクリーンショットを撮る

Question

私は自分のアプリケーションでスクリーンショットを撮りたいと思っていて、それをアプリのローカルフォルダにユニークな名前で保存したいと思います。 だから私を助けてください。

Answer 1

RenderTargetBitmapを使用して画面をキャプチャできます。このコードを試してみてください。

//create and capture Window 
var renderTargetBitmap = new RenderTargetBitmap(); 
await renderTargetBitmap.RenderAsync(Window.Current.Content); 

//create unique file in LocalFolder 
var file = await ApplicationData.Current.LocalFolder.CreateFileAsync("screenshotCapture.jpg", CreationCollisionOption.GenerateUniqueName); 

//create JPEG image 
using (var stream = await file.OpenStreamForWriteAsync()) 
{ 
    var logicalDpi = DisplayInformation.GetForCurrentView().LogicalDpi; 
    var pixelBuffer = await renderTargetBitmap.GetPixelsAsync(); 
    var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream.AsRandomAccessStream()); 
    encoder.SetPixelData(BitmapPixelFormat.Bgra8, 
          BitmapAlphaMode.Straight, 
          (uint)renderTargetBitmap.PixelWidth, 
          (uint)renderTargetBitmap.PixelHeight, logicalDpi, logicalDpi, 
          pixelBuffer.ToArray()); 
    await encoder.FlushAsync(); 
} 

Answer 2

それとも

public static async Task<StorageFile> AsUIScreenShotFileAsync(this UIElement elememtName, string ReplaceLocalFileNameWithExtension) 
    { 
     StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(ReplaceLocalFileNameWithExtension, CreationCollisionOption.ReplaceExisting); 
     try 
     { 
      RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap(); 
      InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream(); 
      // Render to an image at the current system scale and retrieve pixel contents 
      await renderTargetBitmap.RenderAsync(elememtName); 
      var pixelBuffer = await renderTargetBitmap.GetPixelsAsync(); 
      // Encode image to an in-memory stream 
      var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream); 
      encoder.SetPixelData(BitmapPixelFormat.Bgra8, BitmapAlphaMode.Ignore, (uint)renderTargetBitmap.PixelWidth, (uint)renderTargetBitmap.PixelHeight, 
       DisplayInformation.GetForCurrentView().LogicalDpi, 
       DisplayInformation.GetForCurrentView().LogicalDpi, pixelBuffer.ToArray()); 
      await encoder.FlushAsync(); 

      //CreatingFolder 
      // var folder = Windows.Storage.ApplicationData.Current.LocalFolder; 

      RandomAccessStreamReference rasr = RandomAccessStreamReference.CreateFromStream(stream); 
      var streamWithContent = await rasr.OpenReadAsync(); 
      byte[] buffer = new byte[streamWithContent.Size]; 
      await streamWithContent.ReadAsync(buffer.AsBuffer(), (uint)streamWithContent.Size, InputStreamOptions.None); 


      using (IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.ReadWrite)) 

      { 

       using (IOutputStream outputStream = fileStream.GetOutputStreamAt(0)) 

       { 

        using (DataWriter dataWriter = new DataWriter(outputStream)) 

        { 

         dataWriter.WriteBytes(buffer); 

         await dataWriter.StoreAsync(); // 

         dataWriter.DetachStream(); 
        } 
        // write data on the empty file: 
        await outputStream.FlushAsync(); 

       } 
       await fileStream.FlushAsync(); 

      } 
      // await file.CopyAsync(folder, "tempFile.jpg", NameCollisionOption.ReplaceExisting); 
     } 
     catch (Exception ex) 
     { 
      Reporting.DisplayMessageDebugExemption(ex.Message); 
     } 
     return file; 

    }