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  1. <DataTemplate DataType="{x:Type ViewModel:OpeningViewModel}">
  2.         <view:OpeningView/>
  3.    </DataTemplate>
  4.  
  5.     <DataTemplate DataType="{x:Type ViewModel:SecondUCViewModel}">
  6.         <view:SecondUCView/>
  7.     </DataTemplate>
  8.    
  9. #endregion
  10.  
  11.     #region Properties
  12.  
  13.     public int CurrentPageIndex
  14.     {
  15.         get
  16.         {
  17.             if (this.CurrentPage == null)
  18.             {
  19.                 return 0;
  20.             }
  21.             return _pages.IndexOf(this.CurrentPage);
  22.         }
  23.     }
  24.  
  25.     public NavigationBaseViewModel CurrentPage
  26.     {
  27.         get { return _currentPage; }
  28.  
  29.         private set
  30.         {
  31.             if (value == _currentPage)
  32.                 return;
  33.  
  34.             _currentPage = value;
  35.             OnPropertyChanged("CurrentPage");
  36.         }
  37.     }
  38.    
  39. private ICommand _NavigateBackCommand;
  40.     public ICommand NavigateBackCommand
  41.     {
  42.         get
  43.         {
  44.             if (_NavigateBackCommand == null)
  45.             {
  46.                 _NavigateBackCommand = new RelayCommand(param => this.MoveToPreviousPage(), param => CanMoveToPreviousPage);
  47.             }
  48.             return _NavigateBackCommand;
  49.         }
  50.     }
  51.  
  52.  
  53.  
  54.    private bool CanMoveToNextPage
  55.     {
  56.         get
  57.         {
  58.             return this.CurrentPage != null && this.CurrentPage.CanMoveNext;
  59.         }
  60.     }
  61.  
  62.     bool CanMoveToPreviousPage
  63.     {
  64.         get { return 0 < this.CurrentPageIndex && CurrentPage.CanMoveBack; }
  65.     }
  66.  
  67.     private void MoveToNextPage()
  68.     {
  69.         if (this.CanMoveToNextPage)
  70.         {
  71.             if (CurrentPageIndex >= _pages.Count - 1)
  72.                 Cancel();
  73.             if (this.CurrentPageIndex < _pages.Count - 1)
  74.             {
  75.                 this.CurrentPage = _pages[this.CurrentPageIndex + 1];
  76.             }
  77.         }
  78.     }
  79.  
  80.     void MoveToPreviousPage()
  81.     {
  82.         if (this.CanMoveToPreviousPage)
  83.         {
  84.             this.CurrentPage = _pages[this.CurrentPageIndex - 1];
  85.         }
  86.     }
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