Question

我上课有财产，我使用INotifyPropertyChanged来检测更新。

public class Employee : INotifyPropertyChanged
{

  string _lastname;
  public event PropertyChangedEventHandler PropertyChanged;

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

  public string LastName { get { return _lastName; } set { _lastName = value; NotifyPropertyChanged("LastName"); } }

  public Employee(string lastName)
  {
    LastName = lastName;
  }

}

我将它绑定到DataGriView并且它正常工作，LastName自动更新，如果更改。但如果我试图这样做：

BindingList<Employee> employees = new BindingList<Employee>();
private void BindMain()
{
   employees.Add(new Employee("Mike"));
   employees.Add(new Employee("Mike"));
   employees.Add(new Employee("Joo"));
   employees.Add(new Employee("Kate"));

   dataGridView.DataSource = employees; // That's working fine, all data auto update
}

private void BindFiltered()
{
  List<Employee> filtered = employees.Where(r=>r.LastName.Equals("Mike").ToList()); //
  BindingList<Employee> filteredEmployee = new BindingList<Employee>(filtered);
  dataGridView.DataSource = filteredEmployee; //not working auto update
  // Trying also with BindingSource
  BindingSource bs = new BindingSource();
  bs.DataSource = employees.Where(r=>r.LastName.Equals("Mike"));
  dataGridView.DataSource = bs;

}

..自动更新无效。

BindingList检测更改（过滤器）

0 个答案: