public class ImgPathConvert : IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

        {

            if (value == null) return null;

            string CommadnFolderPath = System.Environment.CurrentDirectory;

            string FilePath = System.IO.Path.Combine(CommadnFolderPath, @"Picture\Server\GroupPage\");

            string ImagePath;

            switch((SyncModel.PlatformType)value)

            {

                case SyncModel.PlatformType.DoNetClient :

                    ImagePath = FilePath + "server_pc.png";

                    break;

                case SyncModel.PlatformType.DoNetClientAIO:

                    ImagePath = FilePath + "server_aio.png";

                    break;

                case SyncModel.PlatformType.DoNetClientNB:

                    ImagePath = FilePath + "server_nb.png";

                    break;

                case SyncModel.PlatformType.DoNetClientTable:

                    ImagePath = FilePath + "server_tablet.png";

                    break;

                case SyncModel.PlatformType.DoNetClientMSIAIO:

                    ImagePath = FilePath + "server_aio_msi.png";

                    break;

                case SyncModel.PlatformType.DoNetClientMSINB:

                    ImagePath = FilePath + "server_nb_msi.png";

                    break;

                case SyncModel.PlatformType.DoNetClientMSITable:

                    ImagePath = FilePath + "server_tablet_msi.png";

                    break;

                default :

                    ImagePath = FilePath + "server_pc.png";

                    break;

            }

            Uri uri = new Uri(ImagePath, UriKind.Absolute);

            //Uri uri = new Uri((value as string),UriKind.Relative);

            ImageBrush imgBru = new ImageBrush();

            BitmapImage bImg = new BitmapImage();

            bImg.BeginInit();

            bImg.CacheOption = BitmapCacheOption.OnLoad;

            bImg.UriSource = uri;

            bImg.EndInit();

            imgBru.ImageSource = bImg;

            imgBru.Stretch = Stretch.Fill;

            bImg.Freeze();

            return imgBru;

            // return (isVisible ? Visibility.Visible : Visibility.Hidden);

        }

        public object ConvertBack(object value, Type targetType, object parameter,

           CultureInfo culture)

        {

            return value;

            // throw new InvalidOperationException("Not yet support this function!");

        }

    }

    public class BoolVisibleConvert : IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

        {

            bool isVisible;

            if (value == null || !(value is bool))

            {

                isVisible = false;

            }

            else

            {

                isVisible = (bool)value;

            }

            return (isVisible ? Visibility.Visible : Visibility.Hidden);

        }

        public object ConvertBack(object value, Type targetType, object parameter,

           CultureInfo culture)

        {

            throw new InvalidOperationException("Not yet support this function!");

        }

    }

    public class DateTimeToStringConvert : IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

        {

            DateTime d = (DateTime)value;

            if (DateTime.Equals(d, DateTime.MinValue))

                return string.Empty;

            else

                return d;

        }

        public object ConvertBack(object value, Type targetType, object parameter,CultureInfo culture)

        {

            throw new InvalidOperationException("Not yet support this function!");

        }

    }