从.Net Framework 3.5无法调用vb6 dll。由于以下错误，无法为具有clsid的组件检索COM类工厂：800aea5f [英] From .Net Framework 3.5 can't call vb6 dll. Retrieving the COM class factory for component with clsid failed due to the following error: 800aea5f

问题描述

我尝试从 .Net Framework 3.5 Dll库项目中识别Com dll（在VB6中开发），但出现以下错误：

I try to istanciate a Com dll(developped in VB6) from a ".Net Framework 3.5 Dll Library Project" and I get the following error:

为带有CLSID {...}的组件检索COM类工厂失败，原因是以下错误：800aea5f。

Retrieving the COM class factory for component with CLSID {...} failed due to the following error: 800aea5f.

在同一台计算机上，我尝试从VBScript识别COM dll，并且工作正常。
另外，我尝试注销并重新注册dll却没有良好的结果。

On the same machine I try to istanciate the COM dll from a VBScript and it's work fine. In addition I tried to unregister and re-register the dll without good results.

现在从Windows应用程序.net 3.5可以识别COM dll，但是

Now from a windows applcation .net 3.5 I can istanciate the COM dll but it's impossible to do from a web application (also with and without impersonate configuration into web.config)

DCOM属性：
常规->身份验证=默认
安全性->所有属性=默认
身份->身份=启动者用户

DCOM properties: General --> Authentication = Default Security --> All properties = Default Identity --> Identity = The launcher user

有任何建议吗？

推荐答案

错误是指向用户权限的链接。

The error is link to User Permissions.

调用的树是：WebApplication-> WcfService -> .Net 3.5 dll-> COM dll

The call's tree is: WebApplication --> WcfService --> .Net 3.5 dll --> COM dll

即使我在WebApplication web.config上设置了本地用户模拟，WcfService也会使用与VirtualDirectory的应用程序池关联的用户

Even if I set a local user impersonation on WebApplication web.config, WcfService use the user associate to VirtualDirectory's Application Pool that is "NETWORK SERVICE".

只需将ApplicationPool的默认用户更改为LocalSystem，对COM的调用就可以正常工作

Just I change ApplicationPool's Default User to LocalSystem the call to COM work fine

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