我有一個名爲SalesERPDB的數據庫，我試圖創建一個新表「TblEmployee」，但創建相同的例外。實體框架表創建c＃
public class SalesERPDB : DbContext
{
public SalesERPDB() : base("SalesERPDB")
{
}
public DbSet<Employee> Employees { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Employee>().ToTable("TblEmployee");
base.OnModelCreating(modelBuilder);
}
}
EmployeeBusinessLayer類（在那裏我有一個方法，裝getEmployees（）來獲得員工列表）：
public class EmployeeBusinessLayer
{
public List<Employee> GetEmployees()
{
SalesERPDB salesDal = new SalesERPDB();
return salesDal.Employees.ToList(); // Getting an exception in this line.
}
}
Employee類：
public class Employee
{
[Key]
public int EmployeeId { get; set; }
public string FName { get; set; }
public string LName { get; set; }
public int Salary { get; set; }
}
我能擊中同一連接字符串從不同的應用程序。
連接字符串：
<connectionStrings>
<add name="SalesERPDB" connectionString="Data Source=CSCINDAI406933\\SQLEXPRESS;Initial Catalog=SalesERPDB;Integrated Security=True;" providerName="System.Data.SQLClient"></add>
異常詳細信息：
描述： 'System.InvalidOperationException' 類型的異常出現在EntityFramework.dll但在用戶代碼中沒有處理
異常詳細信息：System.InvalidOperationException：實例失敗。 堆棧跟蹤：[InvalidOperationException：實例故障。] System.Web.Mvc.Async。 <> c__DisplayClass46.b__3f（）323 System.Data.ProviderBase.DbConnectionPool.TryGetConnection（的DbConnection owningObject，TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +78 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1重試，DbConnectionOptions USEROPTIONS，DbConnectionInternal oldConnection，DbConnectionInternal &連接）191 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal （的DbConnection outerConnection，DbConnectionFactory connectionFactory的，TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +119 System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +44 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult的asyncResult）47 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +136 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +50 System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +72 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1重試，DbConnectionOptions USEROPTIONS）154 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection（的DbConnection outerConnection ，DbConnectionFactory connectionFactory，TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +21 System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1重試）141 System.Data.SqlClient.SqlConnection.TryOpen（TaskCompletionSource 1 retry) +362 System.Data.SqlClient.SqlConnection.Open() +96 System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<Open>b__36(DbConnection t, DbConnectionInterceptionContext c) +12 System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch（t目標靶，動作2 operation, TInterceptionContext interceptionContext, Action 3執行，動作3 executed) +72 System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +405 System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +459 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +15 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func 1操作）190 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute （動作操作）82 System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection（的DbConnection SqlConnection的，動作1 act) +194 System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action 1動作）427個 System.Data.Entity.SqlServer.SqlProviderServices.CheckDatabaseExists（SqlConnection的SqlConnection的，可空1 commandTimeout, String databaseName) +86 System.Data.Entity.SqlServer.SqlProviderServices.DbDatabaseExists(DbConnection connection, Nullable 1的CommandTimeout， Lazy 1 storeItemCollection) +122 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +185 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult asyncResult）+42 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +40 System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +34 System.Web.Mvc.Async.WrappedAsyncVoid 1.C allEndDelegate（IAsyncResult的asyncResult）70 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +44 System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +39 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult的asyncResult）62 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +39 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +39 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +39 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult的asyncResult）70 系統。 Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+133 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+56 System.Web.Mvc.Async.AsyncResultWrapper.End（IAsyncResult asyncResult，Object tag）+37 System.Web.Mvc.MvcHandler。EndProcessRequest（IAsyncResult的asyncResult）40 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult的結果）38 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）9644037 System.Web.HttpApplication.ExecuteStep（IExecutionStep step，Boolean & completedSynchronously）+155
修復此問題將非常感激。提前致謝。
更新UR與連接字符串 –
@MidhunMundayadan問題更新了問題用的connectionString – Manju