无法在IIS服务器和客户端上启动Web应用程序

Question

I cloned this web app from ExecuteAutoEmployee in GitHub, but I can't launch it both from the client and from the IIS server then deployed. I am having the following issues:

The system cannot find the file specified 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.ComponentModel.Win32Exception: The system cannot find the file specified

Source Error:

Line 18: Line 19: var migrator = new DbMigrator(new Configuration()); Line 20: migrator.Update(); Line 21:
Line 22:

Source File: D:\\Repositories\\ExecuteAutomationWebApp\\ExecuteAutoEmployee\\Global.asax.cs Line: 20

Stack Trace:

[Win32Exception (0x80004005): The system cannot find the file specified]

[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)]
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +345
System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +258
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +312
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +312
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +312
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 retry) +202
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource 1 retry) +413 System.Data.SqlClient.SqlConnection.Open() +128
System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1 retry) +413 System.Data.SqlClient.SqlConnection.Open() +128
System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1 retry) +413 System.Data.SqlClient.SqlConnection.Open() +128
System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch(TTarget target, Action 2 operation, TInterceptionContext interceptionContext, Action 3 executing, Action 3 executed) +104
System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +503
System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +560 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +18
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func 3 executed) +104
System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +503
System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +560 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +18
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func 3 executed) +104
System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +503
System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +560 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +18
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func 1 operation) +234
System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action 1 act) +927
System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable 1 act) +927
System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable 1 act) +927
System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable 1 commandTimeout, DbConnection sqlConnection, String createDatabaseScript) +124
System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +221
System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +125
System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +156
System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +116
ExecuteAutoEmployee.MvcApplication.Application_Start() in D:\\Repositories\\ExecuteAutomationWebApp\\ExecuteAutoEmployee\\Global.asax.cs:20

[HttpException (0x80004005): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)]
System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +520
System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +176
System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +165
System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +353
System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +341

[HttpException (0x80004005): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)]
System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +523
System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +107 System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +688

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.3056.0

using ExecuteAutoEmployee.Migrations;
using System;
using System.Collections.Generic;
using System.Data.Entity.Migrations;
using System.Data.Entity.Migrations.Infrastructure;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;

namespace ExecuteAutoEmployee
{
    public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {    
            var migrator = new DbMigrator(new Configuration());
            migrator.Update();               

            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
        }
    }
}

Answer 1

I suspect your connection string to your db is incorrect, or the SQL server it's connecting to is on another server that isn't setup to accept remote connections.

Regards

Answer 2

I commented out this bit of code and it worked

 var migrator = new DbMigrator(new Configuration());
        migrator.Update();