C＃得到COM对象PROGID [英] C# Get progID from COM object

问题描述

我想知道是否有一种方式来获得在C＃中的COM对象的进程id。如 - 我有一个公开的文档对象，它是一个COM WebBrowser对象。有没有办法弄清楚，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对象，只是不知道该怎么做的其他方式左右。

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

推荐答案

您可以查询的IPersist 和 的GetClassID上。

You could query for IPersist, and GetClassID on it.

这让你的 CLSID 。然后调用 ProgIDFromCLSID ：

的PInvoke的声明是在这里。

这让你的ProgID

That gets you the ProgID.

编辑：

要查询的接口，你只是做一个投在C＃中：

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，这是什么是实际发生的，如下所示的C ++：

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...
}

（但没有人用手写的东西，这些天，作为智能指针困扰几乎可以模拟C＃经验。）

(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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