ASP.NET和STA COM对象 [英] ASP.NET and STA COM objects
问题描述
展望在此定居的参数。
我的一切使用在VB中创建一个COM对象从ASP.NET页阅读的东西与
All the stuff I've read on using a COM object created in VB from an ASP.NET page is surrounding with
警告 - 请确保你把ASPCOMPAT或将无法正常工作
<一个href=\"http://books.google.co.uk/books?id=-sjg09Crh40C&lpg=PA771&ots=g-vqDun9TR&dq=asp.net%20c%23%20sta&pg=PA771#v=onepage&q=&f=false\" rel=\"nofollow\">http://books.google.co.uk/books?id=-sjg09Crh40C&lpg=PA771&ots=g-vqDun9TR&dq=asp.net%20c%23%20sta&pg=PA771#v=onepage&q=&f=false
不过......我已经设置你猜怎么着 - 没有问题
However... I have set this up and guess what - no problems.
现在，我读这
http://msdn.microsoft.com/en-us/library/ zwk9h2kb.aspx
和
HTTP：//blogs.claritycon。 COM /博客/不要％5Fpeterson /存档/ 2008/01/17 / 3621.aspx
这表明你不会得到一个例外，它只是将不能很好地工作。
Which suggests that you won't get an exception, it just won't work very well.
谁能给出一个明确的答案，这是怎么回事？
Could anyone give a definitive answer to what is going on?
此外，如果有任何的方式，我可以证明MTA和STA之间的切换。（通过一些调试魔法 - ！连看汇编）我会很感激
Also, if there's any way that I could PROVE the switch between MTA and STA (through some debugger magic - even looking at the assembler!) I'd be grateful.
干杯
邓肯
推荐答案
当然，你可以在ASP.NET应用程序使用VB COM组件。你认为VB百万code线都不会得到的任何在.NET的土地的爱吗？ ：）
Sure you can use a VB COM component in an ASP.NET application. You think that millions of lines of VB code aren't going to get any love in .NET-land? :)
VB COM组件是臭名昭著的使用单线程单元（STA）被编译 - 尽管并非总是如此（如果我没记错）
VB COM components are notorious for being compiled using a Single Threaded Apartment (STA) - though not always the case (if I remember correctly).
在.NET中使用STA VB组件，你可能会发现你体验：
When using a STA VB component in .NET you might find that you experience:
- 性能下降
- 由于堵塞终结可能的内存泄漏（不试图将所有的危困，只是似乎更经常发生比不了）
- 脱发
这是简单的方法来确定MTA诉为STA线程是利用WinDBG的，连接的过程中，加载SOS，并执行！线程。你会看到类似的输出：
An easy way to determine MTA v. STA for a thread is to leverage Windbg, connect to the process, load SOS, and execute !threads. You'll see output similar to:
0:015> !threads
ThreadCount: 27
UnstartedThread: 0
BackgroundThread: 17
PendingThread: 0
DeadThread: 10
Hosted Runtime: no
PreEmptive GC Alloc Lock
ID OSID ThreadOBJ State GC Context Domain Count APT Exception
15 1 a28 000d75f0 1808220 Enabled 3823b58c:3823bb08 000d3fe8 0 STA (Threadpool Worker)
19 2 43c 000dd5f0 b220 Enabled 00000000:00000000 000d3fe8 0 MTA (Finalizer)
20 3 b94 000f20b0 80a220 Enabled 00000000:00000000 000d3fe8 0 MTA (Threadpool Completion Port)
21 4 15c 000f5318 1220 Enabled 00000000:00000000 000d3fe8 0 Ukn
请注意，一个线程拥有的STA在APT列中列出。这线程是STA线程和你可能会看到你的VB COM code的调用堆栈上。
Note that one of threads has "STA" listed in the APT column. This thread is a STA thread and your likely to see your VB COM code on its call stack.
引用讨论的问题：
- COM互操作性
- 在STA线程中运行ASMX服务
- 开发高性能的ASP.NET网站
- ASP.NET坑及OutOfMemoryException异常引起的STA组件
- Windows调试工具
在.NET Framework
- COM Interoperability in the .NET Framework
- Running ASMX services on STA Threads
- Developing High Performance ASP.NET Websites
- ASP.NET Hang and OutOfMemoryException caused by STA Components
- Debugging Tools for Windows
祝您好运！
ž
Good Luck!
Z
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