[InvalidOperationException: ConnectionString 属性尚未初始化。]
System.Data.SqlClient.SqlConnection.PermissionDemand() +167
System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection) +32
System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +307
System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +198
System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +422
System.Data.SqlClient.SqlConnection.Open() +199
SqlHelp.open() in d:\Svn\汽车博物馆\Auto\Web\SqlHelp.cs:283
SqlHelp.CreateCommand(String str) in d:\Svn\汽车博物馆\Auto\Web\SqlHelp.cs:50
SqlHelp.GetDataTable(String str) in d:\Svn\汽车博物馆\Auto\Web\SqlHelp.cs:151
Web.Home.Venuestourism.Page_Load(Object sender, EventArgs e) in d:\Svn\汽车博物馆\Auto\Web\Web\Home\Venuestourism.cs:63
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +154
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4082
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