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System.Runtime.InteropServices.COMException

System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {79A2867E-EA02-4683-8199-ED426387BA05} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)). 

今天使用COM interop的时候,碰到了下面这个错误,研究了很久。在浏览下面这个网页的时候,找到了解决方案。

http://stackoverflow.com/questions/4663994/system-runtime-interopservices-comexception-0x80040154

在IIS7的Application Pools中,选中对应的应用程序池 -> Advanced Settings... -> Set the value of "Enable 32-Bit Applications" to True.

System.Runtime.InteropServices.COMException