为什么 myList(i) 不通过 BindingList(of T) 继承类中的属性 Item 传递
我创建了一个继承自 BindingList(of T) 的类，并添加了一个属性 Item(indx as Integer) 遮蔽基本属性项，如下所示
<System.Reflection.DefaultMember("Item")> _
Public Class Unity(Of T As {New, Entity})
Inherits BindingList(Of T)
Implements IUnity
Public Property Item(ByVal indx As Integer) As T
Get
If indx >= Me.Count Then
Throw New ArgumentOutOfRangeException("index")
End If
If Not MyBase.Item(indx)._IsLoaded Then InitDataOfItemsInPage(indx)
Return MyBase.Item(indx)
End Get
Set(ByVal value As T)
MyBase.Item(indx) = value
End Set
End Property
......
End Class
现在，当我尝试访问写入 myUnity.Item(1) 的项时，一切正常。 该代码转到属性 Item 执行其必须执行的操作并返回 myEntity。 但是如果我写 myUnity(1) 我得到 myEntity 而不通过属性项 有谁知道为什么？
I have create a class that inherits from BindingList(of T) and I added a propertyItem(indx as Integer) that shadows base property item as it follows
<System.Reflection.DefaultMember("Item")> _
Public Class Unity(Of T As {New, Entity})
Inherits BindingList(Of T)
Implements IUnity
Public Property Item(ByVal indx As Integer) As T
Get
If indx >= Me.Count Then
Throw New ArgumentOutOfRangeException("index")
End If
If Not MyBase.Item(indx)._IsLoaded Then InitDataOfItemsInPage(indx)
Return MyBase.Item(indx)
End Get
Set(ByVal value As T)
MyBase.Item(indx) = value
End Set
End Property
......
End Class
Now when i try to acces an item writing myUnity.Item(1) everythings works fine.
The code goes to the property Item does what it has to do and returns the myEntity.
But if I write myUnity(1) I get myEntity without passing through the property item
Does anyone knows why?
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看起来 BindingList(of T) 中的“默认属性项”优先于 Unity(...) 类中的 DefaultMemberAttribute。我不知道为什么。
默认属性项(ByVal indx As Integer) As T而不是
<默认成员>(...)工作正常。
It looks like "default property item" from BindingList(of T) takes precedence before DefaultMemberAttribute in Unity(...) class. I don't know why.
Default Property Item(ByVal indx As Integer) As Tinstead of
<DefaultMember>(...)works fine.