Server Error in '/' Application.

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: TCP Provider, error: 0 - 由于目标计算机积极拒绝，无法连接。)

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.Data.SqlClient.SqlException: 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: TCP Provider, error: 0 - 由于目标计算机积极拒绝，无法连接。)

Source Error:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[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: TCP Provider, error: 0 - 由于目标计算机积极拒绝，无法连接。)]
   System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +686
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +85
   System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +1908
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +85
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +270
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +270
   iNethinkCMS.Helper.SQLHelper.PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, String cmdText, SqlParameter[] cmdParms) +57
   iNethinkCMS.Helper.SQLHelper.Query(String SQLString, SqlParameter[] cmdParms) +123
   iNethinkCMS.DAL.MSSQL.DAL_iNethinkCMS_Channel.GetModel(Int32 ID) +264
   System.Data.SqlClient.SqlConnection.Open() +299
   iNethinkCMS.Web.channel.Fun_GetChannelContent(Int32 byID, Int32 byPage) +99
   iNethinkCMS.Web.channel.Page_Load(Object sender, EventArgs e) +404
   iNethinkCMS.Helper.SQLHelper.PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, String cmdText, SqlParameter[] cmdParms) +57
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   iNethinkCMS.Helper.SQLHelper.Query(String SQLString, SqlParameter[] cmdParms) +123
   System.Web.UI.Control.LoadRecursive() +116
   iNethinkCMS.DAL.MSSQL.DAL_iNethinkCMS_Channel.GetModel(Int32 ID) +264
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2750
   iNethinkCMS.Web.channel.Fun_GetChannelContent(Int32 byID, Int32 byPage) +99
   iNethinkCMS.Web.channel.Page_Load(Object sender, EventArgs e) +404
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +25
   System.Web.UI.Control.LoadRecursive() +116
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2750

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1