Question

我想将winrt中的一个Image保存到文件夹中。但我发现没有办法。你能帮忙吗？

var dataPackage = Clipboard.GetContent();
            var t = await dataPackage.GetBitmapAsync();
            var t2 = await t.OpenReadAsync();
            t2.AsStream();
            t2.Seek(0);
            BitmapImage bitmapImage = new BitmapImage();
            bitmapImage.SetSource(t2);
            Image image = new Image();
            image.Source = bitmapImage;<

Answer 1

你走了:)）

请注意，您无法使用任何文件夹进行保存。我已经通过ApplicationData.Current.LocalFolder.Path作为设计。您可以使用FolderPicker然后传递拾取文件夹的路径。

private async Task StoreImageFromClipboardAsync()
{
    var dataPackage = Clipboard.GetContent();
    var formats = dataPackage.AvailableFormats;
    if (formats.Contains("Bitmap"))
    {
        var t = await dataPackage.GetBitmapAsync();
        var file = await ChangeIRASRToStorageFileAsync(t, ApplicationData.Current.LocalFolder.Path, "Clipboard.png");
    }
}

private async Task<StorageFile> ChangeIRASRToStorageFileAsync(IRandomAccessStreamReference MyIRASR, String StorageFolderPath, String StorageFileName)
{
    IRandomAccessStreamWithContentType MyIRASWCT = await MyIRASR.OpenReadAsync();
    StorageFolder MyStorageFolder = await StorageFolder.GetFolderFromPathAsync(StorageFolderPath);
    StorageFile MyStorageFile = await MyStorageFolder.CreateFileAsync(StorageFileName, CreationCollisionOption.ReplaceExisting);
    Windows.Storage.Streams.Buffer MyBuffer = new Windows.Storage.Streams.Buffer(Convert.ToUInt32(MyIRASWCT.Size));
    IBuffer iBuf = await MyIRASWCT.ReadAsync(MyBuffer, MyBuffer.Capacity, InputStreamOptions.None);
    await FileIO.WriteBufferAsync(MyStorageFile, iBuf);
    return MyStorageFile;
}

Answer 2

就这么简单，只需将最后一行添加到现有代码中（例如，对于PNG）

var dataPackage = Clipboard.GetContent();
            var t = await dataPackage.GetBitmapAsync();
            var t2 = await t.OpenReadAsync();
            t2.AsStream();
            t2.Seek(0);
            BitmapImage bitmapImage = new BitmapImage();
            bitmapImage.SetSource(t2);
            Image image = new Image();
            image.Source = bitmapImage;
            image.Save("ImagePathToStore.png", System.Drawing.Imaging.ImageFormat.PNG);

Link for Supported imageformates

Answer 3

上一篇文章示例保存BMP图像而不是PNG图像。如果我想从剪贴板保存PNG文件，以下解决方案适用于我：

private async Task StoreImageFromClipboardAsync()
{
  var dataPackage = Clipboard.GetContent();
  if (datapackage.Contains(StandardDataFormats.Bitmap))
  {
    var t = await dataPackage.GetBitmapAsync();
    var file = await SaveToPngTaskFile(t, ApplicationData.Current.LocalFolder, 
      "Clipboard.png");
  }
}

public static async Task<StorageFile> SaveToPngTaskFile
  (IRandomAccessStreamReference rndAccessStreamReference, 
   StorageFolder storageFolder, String storageFileName)
{
  IRandomAccessStreamWithContentType rndAccessStreamWithContentType = 
    await rndAccessStreamReference.OpenReadAsync();
  StorageFile storageFile = 
    await storageFolder.CreateFileAsync(storageFileName, 
      CreationCollisionOption.GenerateUniqueName);
  var decoder = await BitmapDecoder.CreateAsync(rndAccessStreamWithContentType);
  var pixels = await decoder.GetPixelDataAsync();
  var outStream = await storageFile.OpenAsync(FileAccessMode.ReadWrite);
  var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, outStream);
  encoder.SetPixelData(decoder.BitmapPixelFormat, BitmapAlphaMode.Ignore,
    decoder.OrientedPixelWidth, decoder.OrientedPixelHeight,
    decoder.DpiX, decoder.DpiY,
    pixels.DetachPixelData());
  await encoder.FlushAsync();
  outStream.Dispose();
  return storageFile;
}

从剪贴板保存图像

3 个答案: