Server Error in '/' Application.

无法打开登录所请求的数据库 "jb2021"。登录失败。
用户 'sa' 登录失败。

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: 无法打开登录所请求的数据库 "jb2021"。登录失败。
用户 'sa' 登录失败。

Source Error: 


Line 51:             ConfigurationManager.AppSettings["SQLConnectionString"]))
Line 52:         {
Line 53:             conn.Open();
Line 54: 
Line 55:             using (SqlDataAdapter da = new SqlDataAdapter(sql, conn))

Source File: d:\web\hjb\jb6img.top\s1212.aspx.cs    Line: 53

Stack Trace: 


[SqlException (0x80131904): 无法打开登录所请求的数据库 "jb2021"。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) +345
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +258
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +312
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +202
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +413
   System.Data.SqlClient.SqlConnection.Open() +128
   s1212.GreatDs(String sql) in d:\web\hjb\jb6img.top\s1212.aspx.cs:53
   s1212.Page_Load(Object sender, EventArgs e) in d:\web\hjb\jb6img.top\s1212.aspx.cs:17
   System.Web.UI.Control.OnLoad(EventArgs e) +106
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4108.0