Could Not Load Type ‘System.ServiceModel.Activation.HttpModule’

最新推荐文章于 2021-04-08 18:41:43 发布

weixin_33923148

最新推荐文章于 2021-04-08 18:41:43 发布

阅读量172

点赞数

本文介绍了解决在运行基于WCF的应用程序时遇到的'System.ServiceModel.Activation.HttpModule'类型加载错误的方法。该错误通常发生在安装了.NET Framework 4之后安装IIS的情况下。文章提供了一个简单的解决方案：使用ASP.NET IIS注册工具重新注册ASP.NET。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

When attempting to run a service that receives messages over the HTTP transport, you may receive an error similar to the following:

Server Error in '/WCFApplication' Application

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Description: An unhandled exception occurred during the execution of the current Web request. Review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

This error can occur when IIS is installed after installing .NET Framework 4, or if the 3.0 version of the WCF Http Activation module is installed after installing IIS and .NET Framework 4.

To resolve this problem, you must use the ASP.NET IIS Registration Tool (Aspnet_regiis.exe,) to register the correct version of ASP.NET. This can be accomplished by using the –iru parameters when running aspnet_regiis.exe as follows:

aspnet_regiis.exe -iru