ArcGISRuntime.WPF.Samples.AuthorMap.AuthorMap.WriteTempThumbnailImageAsync C# (CSharp) Метод

        private async Task<string> WriteTempThumbnailImageAsync(ImageSource mapImageSource)
        {
            // Create a new encoder for jpeg images
            var jpegEncoder = new JpegBitmapEncoder { QualityLevel = 70 };

            // Create a bitmap frame to represent the image
            var mapImageBitmapSource = mapImageSource as BitmapSource;
            var mapImageFrame = BitmapFrame.Create(mapImageBitmapSource);

            // Add the frame to the jpeg encoder frames collection
            jpegEncoder.Frames.Add(mapImageFrame);

            // Get the folder for the current executable
            var folder = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);

            // Build the output file name with the executable directory
            var outFile = new FileInfo(Path.Combine(folder, "MapThumbnail_Temp"));

            // If the file already exists, delete it
            if (outFile.Exists)
            {
                await Task.Delay(1000);
                outFile.Delete();
            }

            // Create the output image file
            using (var stm = File.Create(outFile.FullName))
            {
                jpegEncoder.Save(stm);
            }

            // Return the path to the file
            return outFile.FullName;
        }