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

问题描述

我想知道是否有一种方法来获取c＃中com对象的progId。例如 - 我有一个webBrowser对象暴露一个文档对象是COM。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获取对象，只是不知道如何做的其他方式

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

推荐答案

您可以查询 IPersist 和 GetClassID 。

这会得到 CLSID 。然后调用 ProgIDFromCLSID ：

pinvoke声明在这里。 / a>

The pinvoke declaration is here.

这将获得您的ProgID。

That gets you the ProgID.

编辑：

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...
}

在后台，这是实际发生的事情，如C ++中所示：

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...
}

（但是没有人麻烦地用手写这些东西，因为聪明的指针可以模拟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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