以ViewModel的方式绑定itemselect

  
    

   
     public
   
      
   
     class
   
      ViewModel : INotifyPropertyChanged
{ 

   
     private
   
      Item _selectedItem; 

   
     public
   
      ViewModel() 
{ 
 Items 
   
     =
   
      
   
     new
   
      ObservableCollection
   
     <
   
     Item
   
     >
   
     () 
 { 
 
   
     new
   
      Item {Name 
   
     =
   
      
   
     "
   
     Foo
   
     "
   
     }, 
 
   
     new
   
      Item {Name 
   
     =
   
      
   
     "
   
     Bar
   
     "
   
     } 
 }; 
 
   
     foreach
   
      ( Item anItem 
   
     in
   
      Items 
 { 
 anItem.PropertyChanged 
   
     +=
   
      OnItemIsSelectedChanged; 
 } 
} 

   
     public
   
      ObservableCollection
   
     <
   
     Item
   
     >
   
      Items { 
   
     get
   
     ; 
   
     private
   
      
   
     set
   
     ; } 

   
     public
   
      Item SelectedItem 
{ 
 
   
     get
   
      { 
   
     return
   
      _selectedItem; } 
 
   
     set
   
      { 
   
     //
   
      only update if the value is difference, don't 
 
   
     //
   
      want to send false positives 
   
     

   
      
   
     if
   
      ( _selectedItem 
   
     ==
   
      value ) 
 { 
 
   
     return
   
     ; 
 } 
 
 _selectedItem 
   
     =
   
      value; 
 OnPropertyChanged(
   
     "
   
     SelectedItem
   
     "
   
     ); 
 } 
} 

   
     public
   
      
   
     event
   
      PropertyChangedEventHandler PropertyChanged; 

   
     protected
   
      
   
     void
   
      OnItemIsSelectedChanged(
   
     object
   
      sender, PropertyChangedEventArgs e) 
{ 
 
   
     if
   
      ( e.PropertyName 
   
     !=
   
      
   
     "
   
     IsSelected
   
     "
   
      ) 
 { 
 
   
     return
   
     ; 
 } 
 SelectedItem 
   
     =
   
      sender 
   
     as
   
      Item; 
 } 

   
     private
   
      
   
     void
   
      OnPropertyChanged(
   
     string
   
      propertyName) 
{ 
 
   
     if
   
      ( PropertyChanged 
   
     !=
   
      
   
     null
   
      ) 
 { 
 PropertyChanged(
   
     this
   
     , 
   
     new
   
      PropertyChangedEventArgs(propertyName)); 
 } 
 } 
} 
  
    

from:http://stackoverflow.com/questions/985868/mvvm-binding-to-list-isselected-while-tracking-issynchronizedwithcurrentitem