private async System.Threading.Tasks.Task <StorageFile> saveImageToFileAsync(RandomAccessStreamReference img)
{
var imgstream = await img.OpenReadAsync();
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(imgstream);
Windows.UI.Xaml.Media.Imaging.WriteableBitmap src = new Windows.UI.Xaml.Media.Imaging.WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);
src.SetSource(imgstream);
Windows.Graphics.Imaging.BitmapDecoder decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(imgstream);
Windows.Graphics.Imaging.PixelDataProvider pxprd = await decoder.GetPixelDataAsync(Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8, Windows.Graphics.Imaging.BitmapAlphaMode.Straight, new Windows.Graphics.Imaging.BitmapTransform(), Windows.Graphics.Imaging.ExifOrientationMode.RespectExifOrientation, Windows.Graphics.Imaging.ColorManagementMode.DoNotColorManage);
byte[] buffer = pxprd.DetachPixelData();
StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile file = await folder.CreateFileAsync(img.GetHashCode() + "clipboardSaved" + ".png",
CreationCollisionOption.ReplaceExisting);
using (var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite)) {
var encoder = await Windows.Graphics.Imaging.BitmapEncoder.CreateAsync(Windows.Graphics.Imaging.BitmapEncoder.PngEncoderId, fileStream);
encoder.SetPixelData(Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8, Windows.Graphics.Imaging.BitmapAlphaMode.Straight, decoder.PixelWidth, decoder.PixelHeight, decoder.DpiX, decoder.DpiY, buffer);
await encoder.FlushAsync();
}
return(file);
}
public async Task<string> clipboard(DataPackageView con)
{
string str = string.Empty;
//文本
if (con.Contains(StandardDataFormats.Text))
{
str = await con.GetTextAsync();
return str;
}
//图片
if (con.Contains(StandardDataFormats.Bitmap))
{
RandomAccessStreamReference img = await con.GetBitmapAsync();
var imgstream = await img.OpenReadAsync();
Windows.UI.Xaml.Media.Imaging.BitmapImage bitmap = new Windows.UI.Xaml.Media.Imaging.BitmapImage();
bitmap.SetSource(imgstream);
Windows.UI.Xaml.Media.Imaging.WriteableBitmap src = new Windows.UI.Xaml.Media.Imaging.WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);
src.SetSource(imgstream);
Windows.Graphics.Imaging.BitmapDecoder decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(imgstream);
Windows.Graphics.Imaging.PixelDataProvider pxprd = await decoder.GetPixelDataAsync(Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8, Windows.Graphics.Imaging.BitmapAlphaMode.Straight, new Windows.Graphics.Imaging.BitmapTransform(), Windows.Graphics.Imaging.ExifOrientationMode.RespectExifOrientation, Windows.Graphics.Imaging.ColorManagementMode.DoNotColorManage);
byte[] buffer = pxprd.DetachPixelData();
str = "image";
StorageFolder folder = await _folder.GetFolderAsync(str);
StorageFile file = await folder.CreateFileAsync(DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + (ran.Next() % 10000).ToString() + ".png", CreationCollisionOption.GenerateUniqueName);
using (var fileStream = await file.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await Windows.Graphics.Imaging.BitmapEncoder.CreateAsync(Windows.Graphics.Imaging.BitmapEncoder.PngEncoderId, fileStream);
encoder.SetPixelData(Windows.Graphics.Imaging.BitmapPixelFormat.Bgra8, Windows.Graphics.Imaging.BitmapAlphaMode.Straight, decoder.PixelWidth, decoder.PixelHeight, decoder.DpiX, decoder.DpiY, buffer);
await encoder.FlushAsync();
str = $"\n";
}
}
//文件
if (con.Contains(StandardDataFormats.StorageItems))
{
var filelist = await con.GetStorageItemsAsync();
StorageFile file = filelist.OfType<StorageFile>().First();
return await imgfolder(file);
}
return str;
}
static byte[] GetBitmap(DataPackageView dpv)
{
var task = Task <byte[]> .Run(async() =>
{
var reference = await dpv.GetBitmapAsync() as Windows.Storage.Streams.RandomAccessStreamReference;
//var random = (Windows.Storage.Streams.IRandomAccessStream)reference.OpenReadAsync();
var random = await reference.OpenReadAsync();
Windows.Graphics.Imaging.BitmapDecoder decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(random);
Windows.Graphics.Imaging.PixelDataProvider pixelData = await decoder.GetPixelDataAsync();
return(pixelData.DetachPixelData());
});
return(task.Result);
}
