IE BHO为每个选项卡加载了两次 [英] IE BHO loaded two times for each tab
问题描述
我使用此示例创建IE BHO： http://code.msdn.microsoft.com / CSBrowserHelperObject-c5f3d2f6
I am creating IE BHO using this example: http://code.msdn.microsoft.com/CSBrowserHelperObject-c5f3d2f6
我遇到的问题是，每个选项卡BHO加载两次。我在BHO构造函数中插入了以下核心：
The problem I am having is that for each tab BHO is loaded two times. I have inserted following core in BHO constructor:
Trace.WriteLine("BHO.ctor");
Trace.WriteLine("Thread: " + Thread.CurrentThread.ManagedThreadId + " of process: " + Process.GetCurrentProcess().Id);
在析构函数中：
Trace.WriteLine("BHO.destructor");
Trace.WriteLine("Thread: " + Thread.CurrentThread.ManagedThreadId + " of process: " + Process.GetCurrentProcess().Id);
然后在Setsite中：
Then in Setsite:
Trace.WriteLine("Bho.SetSite: " + site);
Trace.WriteLine("Thread: " + Thread.CurrentThread.ManagedThreadId + " of process: " + Process.GetCurrentProcess().Id);
当我在调试输出中启动IE时，我看到：
When I start IE in debug output I see:
[3376] BHO.ctor
[3376] Thread: 1 of process: 3376
[3376] Bho.SetSite: System.__ComObject
[3376] Thread: 1 of process: 3376
[3376] BHO.ctor
[3376] Thread: 3 of process: 3376
[3376] Bho.SetSite: System.__ComObject
[3376] Thread: 3 of process: 3376
/ p>
and only when I close it:
[3376] BHO.destructor
[3376] Thread: 2 of process: 3376
[3376] BHO.destructor
[3376] Thread: 2 of process: 3376
加载两次，并且两个BHO实例同时存在。为什么会发生这种情况？
So, BHO is loaded two times and two instances of BHO exist at the same time. Why can this happen?
我发现这个问题，当我的BHO订阅从第三方汇编的事件，我经历了一些奇怪的行为（因为事件有超过1个订阅者）。首先我认为这是一个第三方库，导致这一点，但现在我从BHO中删除所有额外的代码，所以它基本上什么也仍然加载两次。
I discovered this issue when my BHO subscribed to events from third party assembly and I have experienced some strange behaviour (because there was more than 1 subscriber for the event). First I thought that it's a third-party library who causes this but now I removed all extra code from BHO so it basically does nothing but still is loaded two times.
如果在SetSite中添加OnDocumentComplete处理程序，然后在这个处理程序中我使用trace写入调试控制台的URL我看到，第一个线程URL将是我的页面的实际URL（例如www.google.com），对于第二个线程将是关于：空白。如果我再打开一个标签并在那里做一些操作，然后切换到第一个标签，我看到一个更多的BHO实例被创建（URL：about：blank）
Also if in SetSite I add OnDocumentComplete handler and then in this handler I write URL to debug console using trace I see that for first thread URL will be actual URL of my page (e.g. www.google.com) and for second thread it will be "about:blank". Also if I open one more tab and do something there and then switch to the first tab I see that one more BHO instance is created (URL: about:blank)
推荐答案
这可能是IE的完整性级别管理。
This may be IE's integrity level management.
我试图自己解决这个问题。
I'm trying to solve this myself.
我目前正在考虑：
第二个似乎消失了大约一秒左右。
The second one seems to disappear after a second or so.
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