System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection  outerConnection,  DbConnectionFactory  connectionFactory,  TaskCompletionSource`1  retry,  DbConnectionOptions  userOptions)  +143

System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection  outerConnection,  DbConnectionFactory  connectionFactory,  TaskCompletionSource`1  retry,  DbConnectionOptions  userOptions)  +17

System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1  retry)  +139

System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1  retry)  +448

System.Data.SqlClient.SqlConnection.Open()  +130

NewFolder1.Class1.user(String  ipkey,  String  rz,  Int32  cl)  +154

WebApplication1.api.ProcessRequest(HttpContext  context)  +498

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()  +814

System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep  step)  +132

System.Web.HttpApplication.ExecuteStep(IExecutionStep  step,  Boolean&  completedSynchronously)  +73

版本信息:  Microsoft  .NET  Framework  版本:4.0.30319;  ASP.NET  版本:4.8.4110.0