在某些 2008 R2 环境中使用 WebBrowser 控件出现 COMException
在某些 2008 R2 环境（而不是其他环境）中，我在使用 System.Windows.Forms.WebBrowser 控件时收到 COMExceptions。无论是通过 DocumentText 属性指定内容还是使用 URL 参数调用 Navigate 方法，我都会遇到相同的异常：
COMException - Error HRESULT E_FAIL has returned from a调用 COM 组件。
在 System.Windows.Forms.UnsafeNativeMethods.IWebBrowser2.Refresh()
我发现设置在指定 DocumentText 之前，WebBrowser 上的 ScrollBarsEnabled 属性会导致此异常，并且这似乎是由于调用 Refresh此处）。解决此问题的方法是设置一些模拟内容并调用 Application.DoEvents()。但即使这样做了，它也会在稍后加载内容时（在另一个线程中完成）导致上述异常。
请注意，我指定的 DocumentCompleted 委托正在被命中，但其 WebBrowser.axIWebBrowser2.StatusText 显示发生了异常，并且 WebBrowser.Document 为空。
我可以建立一个简单的应用程序来重现该问题，但我必须找到一个可以重现该错误的 2008 R2 实例才能进行调试。我更多地询问是否有人知道可能影响或导致问题的原因，可能与 COM 安全性等有关。
请注意，我正在 STA Apartment 中执行 WebBrowser代码>状态。
任何想法或建议将不胜感激。提前致谢！ -最大限度
In certain 2008 R2 environments and not others, I'm getting a COMExceptions when utilizing a System.Windows.Forms.WebBrowser control. Whether specifying contents via the DocumentText property or invoking the Navigate method with a URL parameter, I get the same exception:
COMException - Error HRESULT E_FAIL has been returned from a call to a COM component.
at System.Windows.Forms.UnsafeNativeMethods.IWebBrowser2.Refresh()
I've found that setting the ScrollBarsEnabled property on the WebBrowser before specifying DocumentText causes this exception, and that appears to be as a result of calling the Refresh method (referenced above) when the browser has no contents (Last post here). A workaround for this is to set some mock contents and calling Application.DoEvents(). But even with this in place, it causes the above exception while loading the contents later on (done in another thread).
Note that the DocumentCompleted delegate I specify is being hit, but its WebBrowser.axIWebBrowser2.StatusText shows that the exception has occurred, and the WebBrowser.Document is empty.
I could put up a simple app to repro the issue, but I'd have to find a 2008 R2 instance where the bug is reproducible in order to debug. I'm more asking if anyone has ideas of what might be affecting or causing the issue, perhaps with relation to COM security etc.
Note that I am executing the WebBrowser in a STA Apartment state.
Any ideas or suggestions would be greatly appreciated. Thanks in advance!
-Max
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