这是一个DynamicDataObject
派生自的类DynamicObject
public class DynamicDataObject : DynamicObject
{
private readonly Dictionary<string, object> _dataDictionary = new Dictionary<string, object>();
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
return _dataDictionary.TryGetValue(binder.Name, out result);
}
public override bool TrySetMember(SetMemberBinder binder, object value)
{
if (!_dataDictionary.ContainsKey(binder.Name))
{
_dataDictionary.Add(binder.Name, value);
return true;
}
return false;
}
public override IEnumerable<string> GetDynamicMemberNames()
{
return _dataDictionary.Keys;
}
}
我正在消费DynamicDataObject
如下。
public MainWindow()
{
InitializeComponent();
dynamic person = new DynamicDataObject();
person.FirstName = "Vimal";
person.LastName = "Adams";
person.Address = null;
}
我可以在其中看到所有成员person
及其值,_dataDictionary
但同时调试器视图排除了具有null
值的成员。因此该person.Address
成员在动态视图集合中不可见。(请参见下面的屏幕截图)。谁能帮我理解为什么DynamicObject
在这种情况下表现不同?