在N层设计中使用c#惰性加载获取意外错误

我的Web应用程序是在

我必须在DAL中输入以下代码，以便加载通用存储库：

public virtual IList<T> GetAll(params Expression<Func<T, object>>[] navigationProperties)
{
    List<T> list;
    using (var context = new Corporate_WebEntities())
    {
        IQueryable<T> dbQuery = context.Set<T>();
        foreach (Expression<Func<T, object>> navigationProperty in navigationProperties)
            dbQuery = dbQuery.Include<T, object>(navigationProperty);
        list = dbQuery
            .AsNoTracking()
            .ToList<T>();
    }
    return list;
}

---

您正在运行web应用程序，请将这些连接字符串放入您的

web.CONFIG

如果您正在运行web应用程序，请将这些连接字符串放入您的

web.CONFIG

exe的名称是什么？你的.exe.config文件名是什么？它们在同一个文件夹中吗？

Corporate\u WebEntities

的构造函数是什么样子的？@BrendanGreen，这个文件是我在项目中添加EDMX文件时自动生成的。@tmckown-BIN folderBin文件夹中没有所有DLL的可执行文件？？？在ASP.NET中，您的exe文件名是什么？你的.exe.config文件名是什么？它们在同一个文件夹中吗？

Corporate\u WebEntities

的构造函数是什么样子的？@BrendanGreen，这个文件是我在项目中添加EDMX文件时自动生成的。@tmckown-BIN folderBin文件夹中没有所有DLL的可执行文件？？？就像在ASP.NET中一样？天哪，我真不敢相信我竟然忘了这么做。谢谢。天哪，我真不敢相信我竟然忘了做那件事。非常感谢。

...
<connectionStrings>
    <add name="Corporate_WebEntities"
        connectionString="
            metadata=
                res://*/Model.csdl|
                res://*/Model.ssdl|
                res://*/Model.msl;
            provider=System.Data.SqlClient;
            provider connection string=&quot;
                data source=(local);
                initial catalog=Corporate_Web;
                persist security info=True;
                user id=*****;
                password=*****;
                MultipleActiveResultSets=True;
                App=EntityFramework&quot;"
        providerName="System.Data.EntityClient" />
</connectionStrings>
...

No connection string named 'Corporate_WebEntities' could be found in the application config file.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: No connection string named 'Corporate_WebEntities' could be found in the application config file.

Source Error: 
Line 34:                    dbQuery = dbQuery.Include<T, object>(navigationProperty);
Line 35: 
Line 36:                list = dbQuery
Line 37:                    .AsNoTracking()
Line 38:                    .ToList<T>();

Source File: Z:\_Profile Storage\Projects\CorporateWeb.API\CorporateWeb.API.DAL\GenericDataRepository.cs    Line: 36 

Stack Trace: 
[InvalidOperationException: No connection string named 'Corporate_WebEntities' could be found in the application config file.]
   System.Data.Entity.Internal.LazyInternalConnection.get_ConnectionHasModel() +288
   System.Data.Entity.Internal.LazyInternalContext.InitializeContext() +466
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +18
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +53
   System.Data.Entity.Internal.Linq.InternalSet`1.AsNoTracking() +18
   System.Data.Entity.Infrastructure.DbQuery`1.AsNoTracking() +46
   System.Data.Entity.QueryableExtensions.AsNoTracking(IQueryable`1 source) +130
   CorporateWeb.API.DAL.GenericDataRepository`1.GetAll(Expression`1[] navigationProperties) in Z:\_Profile Storage\Projects\CorporateWeb.API\CorporateWeb.API.DAL\GenericDataRepository.cs:36
   CorporateWeb.API.BLL.BusinessLogicLayer_Settings.GetCompanyContactInformation() in Z:\_Profile Storage\Projects\CorporateWeb.API\CorporateWeb.API.BLL\BusinessLogicLayer_Settings.cs:375
   CorporateWeb.API.WebApiApplication.Session_Start() in Z:\_Profile Storage\Projects\CorporateWeb.API\CorporateWeb.API\Global.asax.cs:32

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) +0
   System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) +192
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +136
   System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters) +21
   System.Web.Util.ArglessEventHandlerProxy.Callback(Object sender, EventArgs e) +56
   System.Web.SessionState.SessionStateModule.RaiseOnStart(EventArgs e) +9916528
   System.Web.SessionState.SessionStateModule.CompleteAcquireState() +160
   System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +1095
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +254
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated from a template.
//
//     Manual changes to this file may cause unexpected behavior in your application.
//     Manual changes to this file will be overwritten if the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------

namespace CorporateWeb.API.DAL
{
    using System;
    using System.Data.Entity;
    using System.Data.Entity.Infrastructure;
    using CorporateWeb.API.Model;

    public partial class Corporate_WebEntities : DbContext
    {
        public Corporate_WebEntities()
            : base("name=Corporate_WebEntities")
        {
        }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            throw new UnintentionalCodeFirstException();
        }

        public virtual DbSet<Accounts> Accounts { get; set; }
        ...
    }
}