“/”应用程序中的服务器错误 - LINQ

问题描述

我收到了这个错误。它的工作在当地，但不在线





系统找不到指定的文件

I got this error. Its work local, but not online


The system cannot find the file specified

[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: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.)]
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +356
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +117
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +267
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +318
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +132
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +195
   System.Data.SqlClient.SqlConnection.Open() +122
   System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user) +59
   System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe() +43
   System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode() +27
   System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) +70
   System.Data.Linq.DataQuery`1.System.Collections.Generic.IEnumerable<t>.GetEnumerator() +54
   System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +432
   System.Linq.Enumerable.ToList(IEnumerable`1 source) +70
   Blognyhederdp.Page_Load(Object sender, EventArgs e) +284
   System.Web.UI.Control.OnLoad(EventArgs e) +109
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3321

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.81.0

我尝试过：



我在代码隐藏中使用它，它在当地工作

What I have tried:

I use this in codebhind, and its working local

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Globalization;

public partial class Blognyhederdp : System.Web.UI.Page
{
    DataClassesDataContext db = new DataClassesDataContext();
    protected void Page_Load(object sender, EventArgs e)
    {
        Repeater_Visnyhed.DataSource = db.Posters.OrderByDescending(n => n.Postdate).Take(5).ToList();
        Repeater_Visnyhed.DataBind();
    }

}

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