使用Entity Framework添加Controller不起作用？

时间：2016-09-10 20:32:51

标签： c# asp.net asp.net-mvc entity-framework visual-studio-2015

我正在研究我的第一个MVC项目，以及Andrew Troelsen和Philip Japikse撰写的C＃6.0和.NET 4.6框架。 在我的解决方案中，有两个项目，一个用于MVC应用程序，另一个用于数据访问库，

当我使用EF添加带视图的新控制器时 我收到这个错误：

enter image description here

  

运行所选代码生成器时出错：异常有   被调用的目标抛出

关于这个问题有很多问题，我尝试了所有可能的解决方案：

  • 我将ConnectionString移动到单独的配置文件
  • 我清除了缓存文件夹
  • 我在上下文类
    • 中没有OnModelCreating
  • 我在两个项目上安装了相同版本的EF，两者都是 使用.NET 4.6.1。

出于测试目的，我在DAL项目中创建了一个新的EF模块（创建了实体类和上下文类），当我添加一个Controller时出现错误（消息框错误）说它无法找到应用程序配置中的连接字符串，（我是MVC的新手）我将它从web.config移动到app.config，我得到了同样的错误，我把它移回去了，把它保存在两个配置文件中，它工作正常，脚手架成功完成（我不明白为什么我应该在app.config和web.config文件中保持相同的连接字符串！）。 我修改了我的模块中的连接字符串，导致错误，没有什么不同我发现：

这是App.config：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <connectionStrings>
    <add name="AutoLotConnection" connectionString="data source=.;initial catalog=AutoLotEF;integrated security=True;
         MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
    <add name="MyCon" connectionString="data source=.; initial catalog= AnotherDB; integrated security=true;
         MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient"/>
  </connectionStrings>
</configuration>

的web.config 

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=301880
  -->
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=.;AttachDbFilename=|DataDirectory|\aspnet-MVCTest-20160910010148.mdf;Initial Catalog=aspnet-MVCTest-20160910010148;Integrated Security=True" providerName="System.Data.SqlClient" />
        <add name="MyCon" connectionString="data source=.; initial catalog= AnotherDB; integrated security=true;
         MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient"/>
    <add name="AutoLotConnection" connectionString="data source=.;initial catalog=AutoLotEF;integrated security=True;
         MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />

  <add name="ModelTest" connectionString="data source=(LocalDb)\MSSQLLocalDB;initial catalog=MVCTest.ModelTest;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" /></connectionStrings>
  <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>
    <authentication mode="None" />
    <compilation debug="true" targetFramework="4.6.1" />
    <httpRuntime targetFramework="4.6.1" />
    <httpModules>
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" />
    </httpModules>
  </system.web>
  <system.webServer>
    <modules>
      <remove name="FormsAuthentication" />
      <remove name="ApplicationInsightsWebTracking" />
      <add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
    </modules>
    <validation validateIntegratedModeConfiguration="false" />
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-3.0.1.0" newVersion="3.0.1.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
      </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="0.0.0.0-1.5.2.14234" newVersion="1.5.2.14234" />
      </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.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0" />
      </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>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, 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=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>
  </system.codedom>
</configuration>

这是Model的Inventory类：

[Table("Inventory")]
    public partial class Inventory
    {
        [Key]
        public int CarId { get; set; }
        [StringLength(50)]
        public string Make { get; set; }
        [StringLength(50)]
        public string Color { get; set; }
        [StringLength(50)]
        public string PetName { get; set; }
        [Timestamp]
        public byte[] Timestamp { get; set; }

        public virtual ICollection<Order> Orders { get; set; } = new HashSet<Order>();
    }

上下文类：

public class AutoLotEntities : DbContext
    {
        static readonly DatabaseLogger DatabaseLogger = new DatabaseLogger("sqllog.txt", true);
        public AutoLotEntities()
            : base("name=AutoLotConnection")
        {
            //DbInterception.Add(new ConsoleWriterInterceptor());
            DatabaseLogger.StartLogging();
            DbInterception.Add(DatabaseLogger);
        }
        public virtual DbSet<CreditRisk> CreditRisks { get; set; }
        public virtual DbSet<Customer> Customers { get; set; }
        public virtual DbSet<Inventory> Inventory { get; set; }
        public virtual DbSet<Order> Orders { get; set; }
    }

1 个答案:

答案 0 :(得分：0)

我在上下文类中注释掉了DatabaseLogger行，这解决了这个问题！

//static readonly DatabaseLogger DatabaseLogger = new 
DatabaseLogger("sqllog.txt", true);

       public AutoLotEntities()
            : base("name=AutoLotConnection")
        {
            //DbInterception.Add(new ConsoleWriterInterceptor());
            //DatabaseLogger.StartLogging();
            //DbInterception.Add(DatabaseLogger);
        }
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