如何更新ItemSource？

Question

如果DataContext的changet的TabControl沒有反應過來

<controls:TabControl x:Name="tabControlRoom" 
     ItemsSource="{Binding ElementName=tabControlRoom, 
     Path=DataContext, 
     Converter={StaticResource ConverterCollectionToTabItems}, 
     ConverterParameter={StaticResource MyTabItemContentTemplate}}" > 
</controls:TabControl> 

現在我要在這裏等做的每一個變化

tabControlRoom.ItemsSource = (IEnumerable)new Restaurant.Helpers.Converter.SourceToTabItemsConverter().Convert(
       tabControlRoom.DataContext, 
       null, 
       this.Resources["MyTabItemContentTemplate"], 
       null); 

СConvert

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
{ 
    try 
    { 
    var context = (WorkSpaceContext) value; 

    ControlTemplate controlTemplate = null; 
    var date = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, DateTime.Now.Hour, 0, 0); 


    if(parameter!=null) 
    { 
     try 
     { 
     var listParam = (ObservableCollection<Object>) parameter; 
     if(listParam.Count==3) 
     { 
      controlTemplate = (ControlTemplate)listParam[0]; 
      date = (DateTime) listParam[1]; 
      date = date.AddHours(DateTime.Parse(listParam[2].ToString()).Hour); 
      date = date.AddHours(DateTime.Parse(listParam[2].ToString()).Minute); 
     } 
     else if (listParam.Count == 1) 
     { 

     } 
     } 
     catch (Exception) 
     { 


     throw; 
     } 
    } 


    var workPanels = (IEnumerable)context.WorkPanels; 
    var rooms = context.Rooms; 
    if (workPanels!= null && rooms != null) 
    { 
     var tabItems = new List<TabItem>(); 

     foreach (var room in rooms) 
     { 
     int idRoom = room.id; 
     var nowWorkPanels = from wp in context.WorkPanels 
        where wp.date == date && wp.Table.id_room == idRoom 
        select wp; 


     string headerText = room.name; 


     if (nowWorkPanels.ToList().Count==0) 
     { 
      var tabItem = new TabItem 
         { 
         DataContext = room, 
         Header = headerText, 
         }; 
      if (controlTemplate == null) 
      tabItem.Content = (object) room; 
      else 
      tabItem.Content = new ContentControl {Template = controlTemplate}; 
      tabItems.Add(tabItem); 
     } 
     else 
     { 
      var tabItem = new TabItem 
      { 
      DataContext = nowWorkPanels.ToList(), 
      Header = headerText, 


      }; 
      if (controlTemplate == null) 
      tabItem.Content = (object) nowWorkPanels.ToList(); 
      else 
      tabItem.Content = new ContentControl {Template = controlTemplate}; 
      tabItems.Add(tabItem); 
     } 

     } 

     return tabItems; 
    } 
    return new List<TabItem>(); 
    } 
    catch (Exception) 
    { 
    return null; 
    } 
} 

Answer 1

有你試過這樣： -

<controls:TabControl x:Name="tabControlRoom" 
    ItemsSource="{Binding Converter={StaticResource ConverterCollectionToTabItems}, 
    ConverterParameter={StaticResource MyTabItemContentTemplate}}" 
> 
</controls:TabControl> 

注意，當Binding沒有指定Path時，分配給當前DataContext的對象將成爲使用的值。