通用接口缺少实现

Question

我有一个通用接口，即使我在实现它时声明了类型，它说实现的类错过了成员的所有实现。

界面

Interface IBuilder(Of T)
    Function Number(ByVal literal As String) As T
End Interface

工具

Class BracketsBuilder
    Implements IBuilder(Of String)
    Public Function Number(number__1 As String) As String
        Return number__1
    End Function
End Class

当我尝试运行代码时，我得到

Class 'BracketsBuilder' must implement 'Function Number(literal As String) As String' for interface 'IBuilder(Of String)'.

Answer 1

你需要在Number函数的声明中注明它是Interface中定义的Number Function的实现

Interface IBuilder(Of T)
    Function Number(ByVal literal As String) As T
End Interface

Class BracketsBuilder
    Implements IBuilder(Of String)

    Public Function Number(number__1 As String) As String Implements IBuilder(Of String).Number
        Return number__1
    End Function
End Class

如果你输入

Class BracketsBuilder
    Implements IBuilder(Of String)

然后按回车键，Visual Studio将为您添加函数声明。

通用接口缺少实现

Generic Interface missing implementation

vb.net

interface

implements

generic-interface