錯誤訊息：
System.Data.SqlClient.SqlException (0x80131904): 使用者 'caucgi' 的登入失敗。
於 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool pool, String accessToken, Boolean applyTransientFaultHandling, SqlAuthenticationProviderManager sqlAuthProviderManager)
於 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
於 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
於 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
於 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
於 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
於 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
於 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
於 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
於 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
於 System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
於 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
於 System.Data.SqlClient.SqlConnection.Open()
於 ASP.coursetake2_login_aspx.is_stage(Object stg) 於 d:\inetpub\wwwroot\coursetake2\asp_func\login_func.aspx: 行 80
於 ASP.coursetake2_login_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) 於 d:\inetpub\wwwroot\coursetake2\login.aspx: 行 80
於 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children)
於 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer)
於 System.Web.UI.Page.Render(HtmlTextWriter writer)
於 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter)
於 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter)
於 System.Web.UI.Control.RenderControl(HtmlTextWriter writer)
於 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
ClientConnectionId:41e07f27-00e8-4f1b-93fa-1793c6838410
Error Number:18456,State:1,Class:14