將OberservableCollection分配給ListBox並排除一些條目

Question

我有從一個接口繼承的不同類，所有這些類都被添加到OberservableCollection中。有人能解釋我如何將Observablecollection的所有值分配給我的Listbox，除了類b。

假設（編輯）：

private void start() 
{ 
    DP = new MyClass(); 
    this.ListBox.ItemsSource = new ObservableCollection<WInstance>(MyClass.Handler.Instances.OfType<WInstance>()); 
} 

... 
class Handler() : INotifyPropertyChanged 
{ 
    public ObservableCollection<HandlerItem> Instances { get; private set; } 
... 
} 

class HandlerItem: INotifyPropertyChanged 
{ 
    public Instance inst { get; private set; } //Instance could be WInstance or CInstance 
} 

運行期間MyClass的從遠程計算機WInstance或CInstance的一些對象接收。如果我嘗試用Instances.OfType（）來解決它，似乎我的ItemsSource將更新

Answer 1

var list = new List<Instance>(); 

//.. add all items to your list here. 


ObservableCollection<Instance> OCI = new ObservableCollection<Instance>(list.OfType<classa>()); 
// the above will generate a new ObservableCollection which contains all items of type classa from list.