问题：当前ListBox Items 绑定 集合数据源ListA时候；ListA集合数据源中存在另外一个集合ListB，当更改或往ListB集合中添加数据的时候，通知改变？
实体类继承 INotifyCollectionChanged 即可实现：
BaseViewModel:
public class BaseViewModel : INotifyPropertyChanged, INotifyCollectionChanged, IDisposable
{
public event PropertyChangedEventHandler PropertyChanged;
public event NotifyCollectionChangedEventHandler CollectionChanged; public void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
} public virtual void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
{
if (CollectionChanged != null)
{
CollectionChanged(this, e);
}
} public void Dispose()
{
this.OnDispose();
} protected void OnDispose() { } public void OnCollectionChanged()
{
}
}
ViewModel:
public class ViewModel : BaseViewModel
{
private List<Person> _lp = null;
private RelayCommand _addCommand, _removeCommand; public ViewModel()
{
LP = new List<Person>();
LP.Add(new Person(, "aaa"));
LP.Add(new Person(, "bbb"));
} public List<Person> LP
{
get { return _lp; }
set { _lp = value; }
} public ICommand AddCommand
{
get
{
if (_addCommand == null)
{ _addCommand = new RelayCommand(param => this.Add(), param => this.CanAdd); }
return _addCommand;
}
} public bool CanAdd
{ get { return true; } } public void Add()
{
Person ps = new Person(, "ccc");
LP.Add(ps);
CollectionChanged += new NotifyCollectionChangedEventHandler(List_CollectionChanged);
OnPropertyChanged("LP");
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, LP[], ));
} public ICommand RemoveCommand
{
get
{
if (_removeCommand == null)
{ _removeCommand = new RelayCommand(param => this.Remove(), param => this.CanRemove); }
return _removeCommand;
}
} public bool CanRemove
{ get { return true; } } public void Remove()
{
LP.RemoveAt();
CollectionChanged += new NotifyCollectionChangedEventHandler(List_CollectionChanged);
OnPropertyChanged("LP");
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, LP[], ));
} private void List_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
// ??????????
}
}
完美解决！！
https://social.msdn.microsoft.com/Forums/vstudio/zh-CN/1b55492b-e9ca-4610-a40d-107d64c8ea9f/inotifycollectionchanged-on-listt