BitmapMetadata.cs

using System;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Threading;

namespace SDKSample
{
    public class app : Application
    {
        Window mainWindow;
        
        protected override void OnStartup (StartupEventArgs e)
        {
            base.OnStartup (e);
            CreateAndShowMainWindow ();
        }
        private void CreateAndShowMainWindow ()
        {

            // Create the application's main window
            mainWindow = new Window ();
            mainWindow.Title = "Image Metadata";

            // <SnippetSetQuery>
            Stream pngStream = new System.IO.FileStream("smiley.png", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
            PngBitmapDecoder pngDecoder = new PngBitmapDecoder(pngStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.Default);
            BitmapFrame pngFrame = pngDecoder.Frames[0];
            InPlaceBitmapMetadataWriter pngInplace = pngFrame.CreateInPlaceBitmapMetadataWriter();
            if (pngInplace.TrySave() == true)
            { pngInplace.SetQuery("/Text/Description", "Have a nice day."); }
            pngStream.Close();
            // </SnippetSetQuery>

            // Draw the Image
            Image myImage = new Image();
            myImage.Source = new BitmapImage(new Uri("smiley.png", UriKind.Relative));
            myImage.Stretch = Stretch.None;
            myImage.Margin = new Thickness(20);

            // <SnippetGetQuery>

            // Add the metadata of the bitmap image to the text block.
            TextBlock myTextBlock = new TextBlock();
            myTextBlock.Text = "The Description metadata of this image is: " + pngInplace.GetQuery("/Text/Description").ToString();
            // </SnippetGetQuery>

            // Define a StackPanel to host Controls
            StackPanel myStackPanel = new StackPanel();
            myStackPanel.Orientation = Orientation.Vertical;
            myStackPanel.Height = 200;
            myStackPanel.VerticalAlignment = VerticalAlignment.Top;
            myStackPanel.HorizontalAlignment = HorizontalAlignment.Center;

            // Add the Image and TextBlock to the parent Grid
            myStackPanel.Children.Add(myImage);
            myStackPanel.Children.Add(myTextBlock);

            // Add the StackPanel as the Content of the Parent Window Object
            mainWindow.Content = myStackPanel;
            mainWindow.Show ();
        }
    }

    // Define a static entry class
    internal static class EntryClass
    {
        [System.STAThread()]
        private static void Main ()
        {
            app app = new app ();
            app.Run ();
        }
    }
}