如何从C＃访问一类非托管DLL中的方法 [英] how do I access a method inside a class of unmanaged DLL from C#

问题描述

我需要在用C ++编写的非托管dll中调用类的方法。

例如，DLL名称：cast.dll

cast.dll中的类：解析器

解析器类中的一个函数：castToObject（someVal as string）





例如这里是如何在VB中动态访问它。



dim objCast

设置objCast = Server.CreateObject（cast.parser）

strCastedItem = objCast .castToObject（someValue）



我想从C＃访问castToObject方法。

非常感谢您的帮助。

I need to invoke a method of a class in unmanaged dll written in C++.
e.g., DLL name: cast.dll
A class in cast.dll: parser
A function in parser class: castToObject(someVal as string)


For example here is how to access it in VB dynamically.

dim objCast
Set objCast = Server.CreateObject("cast.parser")
strCastedItem = objCast.castToObject("someValue")

I would like to access the castToObject method from C#.
Your help is highly appreciated.

推荐答案

如果你用Google搜索了....无论如何，我已经用Google搜索并找到了以下网址。可能会帮助你



将COM DLL API调用到我的c＃代码中的步骤 [ ^ ]



COM Interop第1部分：C夏普客户端教程 [ ^ ]

If you have had googled.... Anyway i have googled for you and found below urls. Might help u

steps on calling COM dll API into my c# code[^]

COM Interop Part 1: C Sharp Client Tutorial[^]

Syed，



感谢您的回复。实际上，我做了研究，大多数搜索结果都指向使用DLLImport，如果DLL有一个可以调用的方法，它可以很好地工作。他们都没有展示如何调用该dll类中的方法。



然而，我确实看了你提供的链接，正如我所说的第一个谈到使用DLLImport方法对我来说不起作用，因为该函数在co-clsss中。



只有当我知道cast.dll中解析器类的GUID时，另一个链接才有用。由于我不知道GUID，并且因为com定义没有typlib，所以我无法使用解决方案来解决我的问题。

Syed,

Thanks for the response. Actually, I did research and most of the search results point on using DLLImport which works perfectly if the DLL has a method to be invoked. None of them show how to invoke methods inside a class of that dll.

However, I did look at the links you've provided and as I said the first one that talks about using the DLLImport method didn't work for me because the function is in the co-clsss.

The other link could've been useful only if I know the GUID for the "parser" class inside the cast.dll. Since I don't know the GUID and also since there is no typlib for the com definition, I couldn't use the solution to solve my problem.

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