添加一个TLB作为参考来调用函数VS使用“运行”：有什么区别？ [英] Difference between : adding a tlb as reference to invoke function VS using 'Run'?

问题描述

假设我有一个.net库的一类（TestClass的）与功能添加。我通过编写VBA插件访问该Excel中。我想知道访问FUN1的以下两种方法之间的差异。

Assume I have a .Net library with a class(TestClass) with a function 'Add'. I am accessing this in Excel by writing a VBA addin. I want to know the difference between the following two ways of accessing FUN1.

1. 添加了TLB作为参考，并使用新的作为。

1. Add the tlb as reference and use New as in

昏暗的obj =新MyLibrary.TestClass

Dim obj = New MyLibrary.TestClass

returnval = obj.Add（5,5）

returnval = obj.Add(5,5)

Regasm是NET的DLL和使用运行方法，在

Regasm that .Net dll and use Run method as in

returnVal =运行（添加，5,5）;

returnVal = Run("Add", 5, 5);

我有很多的code，我看到这个类似的访问功能的方式感到很困惑是如何工作的。

I have a lot of code where I see this similar way of accessing a function and am really confused how this works.

如何2工作，将它的工作或什么是neccesary使2的工作是这样的。

How does 2 work, will it work or what is neccesary to make 2 work like this.

推荐答案

您需要与Dim语句在code段的作为关键字替换=。这工作（假设类与COM正确注册）：

You need to replace the = with the As keyword for the Dim statement in your code snippet. This works (assuming that the class is registered properly with COM):

Sub AccessExternalUdf()
    Dim obj As New MyNamespace.MyClass
    result1 = obj.MyMethod    
    result2 = Run("MyMethod")
End Sub

之差（以上由@Hans的规定）是早期与晚期（运行）的结合。

The difference (as stated above by @Hans) is early versus late (Run) binding.

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