System.Data.SqlClient.SqlException (0x80131904): 连接超时时间已到。在登录后阶段超过了此超时时间。连接可能在等待服务器完成登录过程并响应时超时；或者在尝试创建多个活动连接时超时。  尝试连接到此服务器时花费的持续时间是 - [Pre-Login] initialization=1；handshake=6；[Login] initialization=0；authentication=0；[Post-Login] complete=14766； ---> System.ComponentModel.Win32Exception (0x80004005): 等待的操作过时。<br/>   在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal&amp; connection)<br/>   在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal&amp; connection)<br/>   在 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal&amp; connection)<br/>   在 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)<br/>   在 System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)<br/>   在 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)<br/>   在 System.Data.SqlClient.SqlConnection.Open()<br/>   在 KeLin.ClassManager.ExUtility.DbHelperSQL.ExecuteDataset(String connectionString, CommandType commandType, String commandText, SqlParameter[] commandParameters)<br/>   在 KeLin.WebSite.Default.Page_Load(Object sender, EventArgs e)<br/>ClientConnectionId:8407e99e-89b9-4b0b-9fc2-295c307c7c79<br/>Error Number:-2,State:0,Class:11