asp.net - 接口、属性和反射

Question

有谁知道获取接口属性的基础属性名称的方法？

例如，以Juliet 的接口为例，我稍作修改：

Module1

Interface ILifeform 
    ReadOnly Property Name() As String 
    Sub Speak() 
    Sub Eat() 
End Interface 

Class Dog 
    Implements ILifeform 

    Public ReadOnly Property Name() As String Implements ILifeform.Name 
        Get 
            Return "Doggy!" 
        End Get 
    End Property 

    Public Sub Talk() Implements ILifeform.Speak 
        Console.WriteLine("Woof!") 
    End Sub 

    Public Sub Eat() Implements ILifeform.Eat 
        Console.WriteLine("Yum, doggy biscuits!") 
    End Sub 
End Class 

Class Ninja 
    Implements ILifeform 

    Public ReadOnly Property Name() As String Implements ILifeform.Name 
        Get 
            Return "Ninja!!" 
        End Get 
    End Property 

    Public Sub Speak() Implements ILifeform.Speak 
        Console.WriteLine("Ninjas are silent, deadly killers") 
    End Sub 

    Public Sub Eat() Implements ILifeform.Eat 
        Console.WriteLine("Ninjas don't eat, they wail on guitars and kick ass") 
    End Sub 
End Class 

Class Monkey 
    Implements ILifeform 


    Public ReadOnly Property Name() As String Implements ILifeform.Name 
        Get 
            Return "Monkey!!!" 
        End Get 
    End Property 

    Public Sub Speak() Implements ILifeform.Speak 
        Console.WriteLine("Ook ook") 
    End Sub 

    Public Sub Eat() Implements ILifeform.Eat 
        Console.WriteLine("Bananas!") 
    End Sub 
End Class 


Sub Main() 
    Dim lifeforms As ILifeform() = New ILifeform() {New Dog(), New Ninja(), New Monkey()} 
    For Each x As ILifeform In lifeforms 
        HandleLifeform(x) 
    Next 

    Console.ReadKey(True) 
End Sub 

Sub HandleLifeform(ByVal x As ILifeform) 
    Console.WriteLine("Handling lifeform '{0}'", x.Name) 
    x.Speak() 
    x.Eat() 
    Console.WriteLine() 
End Sub 
End Module 

对于 Dog 类，实现“Speak”的属性称为“Talk”。

如果我收到一个作为“对象”类型的狗对象，我可以做这样的事情吗？

If TypeOf(object) Is ILifeForm Then
   Dim str as string = CType(object, ILifeForm).GetUnderLyingPropertyName("Speak"))
   ' str now contains "Talk"
End If

Answer 1

why doing this:

CType(object, ILifeForm).GetUnderLyingPropertyName("Speak"))

when it is much simpler doing this:

CType(object, ILifeForm).Speak

? Job Done. that's a classic polymorphism.