public class ImgPathConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value =http://www.mamicode.com/= 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 =http://www.mamicode.com/= 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!");
        }
    }