（番外）青葱岁月（4）

“/”应用程序中的服务器错误。

无法打开登录所请求的数据库?"cdn_sql"。登录失败。

用户?"sa"?登录失败。

说明:?执行当前?Web?请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息:?System.Data.SqlClient.SqlException:?无法打开登录所请求的数据库?"cdn_sql"。登录失败。

用户?"sa"?登录失败。

源错误:

执行当前?Web?请求期间生成了未经处理的异常。可以使用下面的异常堆栈跟踪信息确定有关异常原因和发生位置的信息。

堆栈跟踪:

[SqlException?(0x80131904):?无法打开登录所请求的数据库?"cdn_sql"。登录失败。

用户?"sa"?登录失败。]

System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection?owningObject,?UInt32?waitForMultipleObjectsTimeout,?Boolean?allowCreate,?Boolean?onlyOneCheckConnection,?DbConnectionOptions?userOptions,?DbConnectionInternal&?connection)?+1307

System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection?owningObject,?TaskCompletionSource`1?retry,?DbConnectionOptions?userOptions,?DbConnectionInternal&?connection)?+108

System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection?owningConnection,?TaskCompletionSource`1?retry,?DbConnectionOptions?userOptions,?DbConnectionInternal?oldConnection,?DbConnectionInternal&?connection)?+941

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.C(String?ipkey,?String?rz,?Int32?cl)?+154

WebA.ProcessRequest(HttpContext?context)?+499

System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute?+814

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

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

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