Exemplos de Windows.UI.Xaml.Media.Imaging.WriteableBitmap.SetSource em C# (CSharp)

Exemplo n.º 1

Arquivo: MyUserControl.xaml.cs Projeto: usamaa9/msdn-code-gallery-community-m-r

        LoadImageAsync(Windows.Storage.StorageFile file)
        {
            Windows.Storage.FileProperties.ImageProperties imgProp = await file.Properties.GetImagePropertiesAsync();

            using (var imgStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
            {
                var bitmap = new Windows.UI.Xaml.Media.Imaging.WriteableBitmap((int)imgProp.Width, (int)imgProp.Height);
                bitmap.SetSource(imgStream);
                return(bitmap);
            }
        }

Exemplo n.º 2

        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 = $"![这里写图片描述](image/{file.Name})\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;
        }