Server Error in '/' Application.

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Line 38:         if (!IsPostBack)
Line 39:         {
Line 40:             ZZY.Model.xp_menus MenusModel = new ZZY.BLL.xp_menus().GetModel(menuid);
Line 41:             if (MenusModel.parentid == 0)
Line 42:             {

[OleDbException (0x80004005): 不能使用 ''；文件已在使用中。]
   System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString constr, OleDbConnection connection) +351
   System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningObject) +86
   System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) +31
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +76
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +126
   System.Data.OleDb.OleDbConnection.Open() +43
   DbHelperOleDb.PrepareCommand(OleDbCommand cmd, OleDbConnection conn, OleDbTransaction trans, String cmdText, OleDbParameter[] cmdParms) in J:\2017-12\9159金莎游艺场\9159金莎游艺场\52新双语\DBUtility\DbHelperOleDb.cs:271
   DbHelperOleDb.Query(String SQLString, OleDbParameter[] cmdParms) in J:\2017-12\9159金莎游艺场\9159金莎游艺场\52新双语\DBUtility\DbHelperOleDb.cs:249
   ZZY.DAL.xp_menus.GetModel(Int32 id) in J:\2017-12\9159金莎游艺场\9159金莎游艺场\52新双语\DAL\xp_menus.cs:227
   ZZY.BLL.xp_menus.GetModel(Int32 id) in J:\2017-12\9159金莎游艺场\9159金莎游艺场\52新双语\BLL\xp_menus.cs:88
   _Default.Page_Load(Object sender, EventArgs e) in d:\ekemWeb\ekemWeb\news_detail.aspx.cs:40
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207