C# &引用；基础提供程序未能打开"；使用WEB API和实体框架项目的IIS本地计算机上出现异常

我有一个Web API 2项目，该项目与本地IIS express完美配合，但当我在本地计算机IIS上部署时，出现以下错误：

{
  "Message": "An error has occurred.",
  "ExceptionMessage": "The underlying provider failed on Open.",
  "ExceptionType": "System.Data.Entity.Core.EntityException",
  "StackTrace": "   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()\r\n   at System.Data.Entity.Core.Objects.ObjectContext.EnsureConnection()\r\n   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)\r\n   at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass49.<ExecuteFunction>b__47()\r\n   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n   at System.Data.Entity.Core.Objects.ObjectContext.ExecuteFunction(String functionName, ObjectParameter[] parameters)\r\n   at ServiceDBUtility.FamLinkEntities.MBSP_INSERT_ERROR_LOG(String p_ID_USER, String p_ERROR_MSG, String p_ERROR_TRACE, String p_ERROR_TYPE, String p_REQUEST_URL, Nullable`1 p_ERROR_DATE)\r\n   at ServiceDBUtility.Repository.LogRepository.WriteLog(String p_ID_USER, String p_ERROR_MSG, String p_ERROR_TRACE, String p_ERROR_TYPE, String p_REQUEST_URL, Nullable`1 p_ERROR_DATE)\r\n   at ServiceDBUtility.CommonFunctions.WriteLog(String USER_ID, Exception Ex, String reqURL)\r\n   at ServiceDBUtility.CommonFunctions.ThrowException(Exception e, HttpRequestMessage request, String customErrorMessage)\r\n   at LoginService.Controllers.LoginController.Login()\r\n   at lambda_method(Closure , Object , Object[] )\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)\r\n   at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Web.Http.Filters.ActionFilterAttribute.<CallOnActionExecutedAsync>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.ActionFilterAttribute.<ExecuteActionFilterAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()",
  "InnerException": {
    "Message": "An error has occurred.",
    "ExceptionMessage": "Login failed for user ''.",
    "ExceptionType": "System.Data.SqlClient.SqlException",
    "StackTrace": "   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)\r\n   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)\r\n   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)\r\n   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)\r\n   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)\r\n   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)\r\n   at System.Data.SqlClient.SqlConnection.Open()\r\n   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.<>c__DisplayClass1.<Execute>b__0()\r\n   at System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)\r\n   at System.Data.Entity.Core.EntityClient.EntityConnection.Open()"
  }
}

{
“消息”：“发生错误。”，
“ExceptionMessage”：“基础提供程序在打开时失败。”，
“ExceptionType”：“System.Data.Entity.Core.EntityException”，
“StackTrace”：“at System.Data.Entity.Core.EntityClient.EntityConnection.Open（）\r\n at System.Data.Entity.Core.Objects.ObjectContext.EnsureReconnection（）\r\n at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T]（System.Data.Entity.Core.Objects.ObjectContext.c_uuDisplayClass49.b_uu47（）\r\n位于System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult]（Func`1操作）\r\n位于System.Data.Entity.Core.Objects.ObjectContext.ExecuteFunction（字符串functionName，ObjectParameter[]参数）\r\n位于ServiceDBUtility.FamLinkEntities.MBSP_INSERT_ERROR_LOG（字符串p_ID_USER，字符串p_ERROR_MSG，字符串p_ERROR_TRACE，字符串p_ERROR_类型，字符串p_请求_URL，可为空的'1 p_ERROR_日期）\r\n在servicedbulity.Repository.LogRepository.WriteLog（字符串p\u ID\u USER，字符串p\u ERROR\u MSG，字符串p\u ERROR\u TRACE，字符串p\u ERROR\u TYPE，字符串p\u REQUEST\u URL，可空的'1 p\u ERROR\u DATE）\r\n在servicedbulity.CommonFunctions.WriteLog（字符串用户ID，异常示例，字符串reqURL）\r\n在servicedbulity.CommonFunctions.throweexception（例外情况e，HttpRequestMessage请求，字符串customErrorMessage）\r\n在LoginService.Controllers.LoginController.Login（）\r\n在lambda_方法（闭包，对象，对象[]）处\r\n在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.c_DisplayClass10.b_9（对象实例，对象[]方法参数）\r\n在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync（HttpControllerContext controllerContext，IDictionary`2参数，CancellationToken CancellationToken）\r\n--从引发异常的上一个位置开始的堆栈结束跟踪---\r\n在System.Runtime.CompilerServices.TaskWaiter.ThrowForOnSuccess（任务任务）\r\n位于System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务）\r\n位于System.Web.Http.Controllers.ApiControllerActionInvoker.d_u0.MoveNext（）\r\n---来自引发异常的上一个位置的堆栈结束跟踪---\r\n位于System.Runtime.CompilerServices.TaskAwaiter.ThrowForOnSuccess（任务任务）\r\n位于System.Web.Http.Filters.ActionFilterAttribute.d\u 5.MoveNext（）\r\n--从引发异常的上一个位置开始的堆栈结束跟踪---\r\n位于System.Web.Http.Filters.ActionFilterAttribute.d\u 5.MoveNext（）处\r\n---从引发异常的上一个位置开始的堆栈结束跟踪----\r\n在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess（任务任务任务）\r\n在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务任务任务）\r\n在System.Web.Http.Filters.ActionFilterAttribute.d\u 0.MoveNext（）\r\n---从引发异常的上一个位置开始的堆栈结束跟踪----\r\n在System.Runtime.CompilerServices.TaskWaiter.ThrowForNonSuccess（任务任务任务）\r\n在System.Runtime.CompilerServices.TaskWaiter.HandleNonSuccessAndDebuggerNotification（任务任务任务任务）\r\n在System.Web.Http.Controllers.ActionFilterResult.d\u 2.MoveNext（）\r\n---从引发异常的上一个位置开始的堆栈结束跟踪----\r\n在System.Runtime.CompilerServices.TaskAwaiter.ThrowForOnSuccess（任务任务任务）\r\n在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification（任务任务任务任务）\r\n在System.Web.Http.Dispatcher.HttpControllerDispatcher.d_1.MoveNext（），
“内部异常”：{
“消息”：“发生错误。”，
“ExceptionMessage”：“用户“”登录失败。”，
“ExceptionType”：“System.Data.SqlClient.SqlException”，
“StackTrace”：“在System.Data.ProviderBase.DbConnectionPool.TryGetConnection（DbConnection owningObject，UInt32 waitForMultipleObjectsTimeout，Boolean allowCreate，Boolean OnlyOnEckConnection，DbConnectionOptions userOptions，DbConnectionInternal&connection）\r\n在System.Data.ProviderBase.DbConnectionPool.TryGetConnection（数据库连接所有者对象，TaskCompletionSource`1重试，数据库连接选项用户选项，数据库连接内部和连接）\r\n位于System.Data.ProviderBase.DbConnectionFactory.TryGetConnection（DbConnection owningConnection，TaskCompletionSource`1重试，DbConnectionOptions用户选项，DbConnectionInternal oldConnection，DbConnectionInternal&connection）\r\n位于System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal（DbConnection outerConnection、DbConnectionFactory connectionFactory、TaskCompletionSource`1重试、DbConnectionOptions用户选项）\r\n位于System.Data.SqlClient.SqlConnection.TryOpenner（TaskCompletionSource`1重试）\r\n位于System.Data.SqlClient.SqlConnection.TryOpen（TaskCompletionSource`1重试）\r\n在System.Data.SqlClient.SqlConnection.Open（）\r\n在System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.c_uDisplayClass1.b_uu0（）\r\n在System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult]（Func`1操作）在System.Data.EntityClient.EntityConnection.Open（）上
}
}

---

是否有人能够深入了解可能导致此错误的原因？

@mahesh-通过查看堆栈跟踪，似乎存在一些登录/身份验证问题（从日志中查找摘录）。请检查SQL Server上的凭据/访问权限

d__1.MoveNext（）“， “内部异常”：{ “消息”：“发生错误。”， “ExceptionMessage”：“用户“”登录失败。”， “例外类型”