使窗體重新檢查ModelView

Question

我有一個WPF窗體使用ModelView。這ModelView有一個List的項目。問題是，當我將項目更改爲列表時，表單繼續存在舊項目。

有誰知道我怎樣才能使通知的形式，他已與ModelView更新它的數據嗎？

Answer 1

使用ObservableCollection和視圖模型

例

實現INotifyPropertyChanged如果你有人員名單，榜上有名的ObservableCollection<Person>

public class MyViewModel : INotifyPropertyChanged 
{ 
    private ObservableCollection<Person> m_persons; 
    public ObservableCollection<Person> Persons 
    { 
     get 
     { 
      return m_persons; 
     } 
     set 
     { 
      m_persons = value; 
      OnPropertyChanged("Persons"); 
     } 
    } 

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

在Person

實現 INotifyPropertyChanged

public class Person : INotifyPropertyChanged 
{ 
    private string m_name; 
    public string Name 
    { 
     get 
     { 
      return m_name; 
     } 
     set 
     { 
      m_name = value; 
      OnPropertyChanged("Name"); 
     } 
    } 

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