MARKUS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Data;

namespace KCOM.Common

{

    public class ImageAsyncHelper : DependencyObject

    {

        public static Uri GetSourceUri(DependencyObject obj) { return (Uri)obj.GetValue(SourceUriProperty); }

        public static void SetSourceUri(DependencyObject obj, Uri value) { obj.SetValue(SourceUriProperty, value); }

        public static readonly DependencyProperty SourceUriProperty = DependencyProperty.RegisterAttached("SourceUri", typeof(Uri), typeof(ImageAsyncHelper), new PropertyMetadata

        {

            PropertyChangedCallback = (obj, e) =>

            {

                //if (((System.Windows.Controls.Image)obj).Source == null)

                //{

                    System.Diagnostics.Debug.WriteLine(e.NewValue);

                    ((System.Windows.Controls.Image)obj).SetBinding(System.Windows.Controls.Image.SourceProperty,

                        new Binding("VerifiedUri")

                        {

                            Source = new ImageAsyncHelper { GivenUri = (Uri)e.NewValue },

                            IsAsync = true,

                        });

                //}

            }

        });

        Uri GivenUri;

        public Uri VerifiedUri

        {

            get

            {

                try

                {

                    //Dns.GetHostEntry(GivenUri.DnsSafeHost);

                    return GivenUri;

                }

                catch (Exception)

                {

                    return null;

                }

            }

        }

    }

}