Question

我一直试图解决此错误一段时间但没有成功。我想知道有人可以帮我开始识别可能导致此错误的原因。

我试着查看调用它的PHP脚本没有帮助。另外，我无法找到这条路：

Inventory1.welcome.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot\Inventory1\welcome.aspx.cs:55

完成错误消息

[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.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +6256377
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +245
   System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, SqlConnection owningObject) +6270399
   System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +181
   System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +6271242
   System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +6271208
   System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +354
   System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +703
   System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +54
   System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +6272472
   System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +81
   System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +1657
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +88
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +6275911
   System.Data.SqlClient.SqlConnection.Open() +258
   Inventory1.welcome.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot\Inventory1\welcome.aspx.cs:55
   System.Web.UI.Control.OnLoad(EventArgs e) +132
   System.Web.UI.Control.LoadRecursive() +66
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2428

非常感谢提前！

Answer 1

这是SqlException。

发生与网络相关或特定于实例的错误建立与SQL Server的连接。找不到服务器或无法访问。验证实例名称是否正确 SQL Server配置为允许远程连接。（提供者：命名管道提供程序，错误：40 - 无法打开与SQL Server的连接）

Page_Load页面的代码隐藏文件的

Welcome.aspx方法试图打开与sql-server的连接，但它失败了。检查你的连接字符串。

基本上你应该在打开它之前给SqlConnection对象一个valid connection string来查询数据库。实施例;

using(SqlConnection cnn = new SqlConnection("valid_connection_string"))
{
   //Other stuff
   cnn.Open();
   //Execute the command
}

This web site有各种不同类型的连接字符串。

Answer 2

下面是关于Sql Connection调试的完整记录的URL。

您的问题可能就像错误的密码一样简单。

OR

这将是Sql Server不允许远程连接。

http://blogs.msdn.com/b/walzenbach/archive/2010/04/14/how-to-enable-remote-connections-in-sql-server-2008.aspx

SqlException故障排除（0x80131904）

2 个答案: