由于已明确禁止所请求的页类型，无法对该类型的页提供服务。扩展名“.cshtml”可能不正确。   请检查以下的 URL 并确保其拼写正确。

iis10 已经设置 .cshtml 处理程序映射。还是这样子。

web.config配置：


<?xml version="1.0" encoding="utf-8"?>
<!--
  有关如何配置 应用程序的详细信息，请访问
  https://go.
  -->
<configuration>
  <appSettings>
    <add key="webpages:Version" value="3.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <compilation targetFramework="4.5" />
    <httpRuntime targetFramework="4.5" />
    <customErrors mode="Off" />
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" />
        <bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-12.0.0.0" newVersion="12.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Optimization" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="1.1.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.7.0" newVersion="5.2.7.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>
  </system.codedom>
    <system.webServer>
        <handlers>
            <remove name="PageHandlerFactory-ISAPI-4.0_64bit" />
            <remove name="cshtm-ISAPI-4.0_32bit" />
            <remove name="cshtm-ISAPI-4.0_64bit" />
            <remove name="cshtml-ISAPI-4.0_64bit" />
            <remove name="PageHandlerFactory-ISAPI-4.0_32bit" />
            <remove name="PageHandlerFactory-ISAPI-2.0-64" />
            <remove name="PageHandlerFactory-ISAPI-2.0" />
            <remove name="cshtml-ISAPI-4.0_32bit" />
            <remove name="cshtml-Integrated-4.0" />
            <add name="cshtml-Integrated-4.0" path="*.cshtml" verb="GET,HEAD,POST,DEBUG" type="System.Web.HttpForbiddenHandler" resourceType="File" requireAccess="Script" preCondition="integratedMode,runtimeVersionv4.0" />
            <add name="cshtml-ISAPI-4.0_32bit" path="*.cshtml" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
            <add name="PageHandlerFactory-ISAPI-2.0" path="*.aspx" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework\v2.0.50727\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv2.0,bitness32" responseBufferLimit="0" />
            <add name="PageHandlerFactory-ISAPI-2.0-64" path="*.aspx" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework64\v2.0.50727\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv2.0,bitness64" responseBufferLimit="0" />
            <add name="PageHandlerFactory-ISAPI-4.0_32bit" path="*.aspx" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
            <add name="cshtml-ISAPI-4.0_64bit" path="*.cshtml" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
            <add name="cshtm-ISAPI-4.0_64bit" path="*.cshtm" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
            <add name="cshtm-ISAPI-4.0_32bit" path="*.cshtm" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness32" responseBufferLimit="0" />
            <add name="PageHandlerFactory-ISAPI-4.0_64bit" path="*.aspx" verb="GET,HEAD,POST,DEBUG" modules="IsapiModule" scriptProcessor="%windir%\\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="File" requireAccess="Script" preCondition="classicMode,runtimeVersionv4.0,bitness64" responseBufferLimit="0" />
        </handlers>
    </system.webServer>
   
   
</configuration>
<!--ProjectGuid: 762FF717-C894-43B4-B172-DB4FC4E400AC-->

那怎么游览，客户端。

提示这个错误。

http://localhost:8999/Home/


“/”应用程序中的服务器错误。

找到多个与名为“Home”的控制器匹配的类型。如果为此请求(“{controller}/{action}/{id}”)提供服务的路由没有指定命名空间以搜索与此请求相匹配的控制器，则会发生这种情况。如果是这样，请通过调用带有 'namespaces' 参数的 "MapRoute" 方法的重载来注册此路由。

“Home”请求找到下列匹配的控制器:
WebApplication12.Controllers.HomeController
WebApplication11.Controllers.HomeController
 说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

 异常详细信息: System.InvalidOperationException: 找到多个与名为“Home”的控制器匹配的类型。如果为此请求(“{controller}/{action}/{id}”)提供服务的路由没有指定命名空间以搜索与此请求相匹配的控制器，则会发生这种情况。如果是这样，请通过调用带有 'namespaces' 参数的 "MapRoute" 方法的重载来注册此路由。

已经解决了。是我多想了一步。其他调试多了，直接用cshtml文件来游览，这个方式不对。谢谢，apull。