C# 从 COM 对象获取 progID [英] C# Get progID from COM object

问题描述

我想知道是否有办法在 c# 中获取 com 对象的 progId.例如 - 我有一个 webBrowser 对象，它公开了一个 COM 文档对象.有没有办法找出该文档对象的 progID 是什么?

i would like to know if there is a way to get the progId of a com object in c#. eg - i have a webBrowser object that exposes a document object which is COM. is there a way to figure out what the progID of that document object is?

我知道你可以从 progID 中获取对象，只是不知道如何反过来.

I know you can get the object from progID, just not sure how to do the other way around.

推荐答案

你可以查询IPersist，GetClassID 就可以了.

You could query for IPersist, and GetClassID on it.

这将为您提供 CLSID.然后调用ProgIDFromCLSID:

That gets you the CLSID. Then call ProgIDFromCLSID:

pinvoke 声明在这里.

这会让你得到 ProgID.

That gets you the ProgID.

要查询接口，只需在 C# 中进行转换:

To query for an interface, you just do a cast in C#:

IPersist p = myObj as IPersist;
if (p != null)
{
    // phew, it worked...
}

在幕后，这就是实际发生的事情，如 C++ 所示:

Behind the scenes, this is what is actually happening, as shown here in C++:

IUnknown *pUnk = // ... get object from somewhere

IPersist *pPersist = 0;
if (SUCCEEDED(pUnk->QueryInterface(IID_IPersist, (void **)&pPersist)))
{
    // phew, it worked...
}

(但是现在没有人费心手写这些东西，因为智能指针几乎可以模拟 C# 体验.)

(But no one bothers with writing that stuff by hand these days, as a smart pointer can pretty much simulate the C# experience.)

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