Server Error in '/' Application.

无法打开登录所请求的数据库 "jg0"。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 "jg0"。登录失败。
用户 'sa' 登录失败。

Source Error: 


Line 288:        conn.ConnectionString = ConfigurationSettings.AppSettings["SQLConnectionString"];//给连接字符串赋值
Line 289:        //conn.ConnectionString = "server=209.74.110.186,5810;database=jg2020;uid=sa;pwd=Y3GwLHaP8zQ0seZG;Max Pool Size = 512;";
Line 290:        conn.Open();//打开数据库
Line 291:        try
Line 292:        {

Source File: d:\web\JG\dygs.jgdyde.com\z2.aspx.cs    Line: 290

Stack Trace: 


[SqlException (0x80131904): 无法打开登录所请求的数据库 "jg0"。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) +357
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +79
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +201
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +156
   System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +22
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +92
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +219
   System.Data.SqlClient.SqlConnection.Open() +101
   z2.GreatDs(String sql) in d:\web\JG\dygs.jgdyde.com\z2.aspx.cs:290
   z2.bindimgs() in d:\web\JG\dygs.jgdyde.com\z2.aspx.cs:493
   z2.Page_Load(Object sender, EventArgs e) in d:\web\JG\dygs.jgdyde.com\z2.aspx.cs:27
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52
   System.Web.UI.Control.OnLoad(EventArgs e) +97
   System.Web.UI.Control.LoadRecursive() +61
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4676.0