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在 VS2013 下开发的 MVC4 网站,基于 .net 4.5,服务器是一台 Windows 2008 R2,运行的时候就报错了
The ‘targetFramework‘ attribute in the <compilation> element of the Web.config file is used only to target version 4.0 and later of the .NET Framework (for example, ‘<compilation targetFramework="4.0">‘). The ‘targetFramework‘ attribute currently references a version that is later than the installed version of the .NET Framework. Specify a valid target version of the .NET Framework, or install the required version of the .NET Framework.
<system.web> <compilation debug="true" targetFramework="4.5" /> <httpRuntime targetFramework="4.5" /> </system.web>
因为2008 R2默认只安装了.Net 4,升级.Net 4.5再重新注册到IIS应该可以解决,但服务器上不能随便升级,所以我们需要修改一下配置:
<system.web> <compilation debug="true" /> <httpRuntime targetFramework="4.0" /> </system.web>
compilation是编译设置,在部署环境无须设置 targetFramework,当然 debug 也可以设置成 false
httpRuntime是运行时,我们知道 .Net 4.0 和 .Net 4.5 的运行时版本都是 .Net 4.0,所以改成4.0就OK了
<compilation debug="true" targetFramework="4.5"> 报错解决方案
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原文地址:http://www.cnblogs.com/felixnet/p/5128698.html