Access DB not displaying in DataGridView in C# -


this driving me nuts. i've seen other responses type of question hasn't helped. created simple access db , want display tables in datagrid. i've created similar worked yet when try this, won't display. how can check if connection working? code being used is

using system; using system.collections.generic; using system.componentmodel; using system.data; using system.drawing; using system.linq; using system.text; using system.windows.forms; using system.data.oledb;      namespace castock     {         public partial class form1 : form         {             public form1()             {                 initializecomponent();             }              private datatable dtable = new datatable();              private void form1_load(object sender, eventargs e)             {                 string sqlstr = "select * products";                  updatedatagrid(sqlstr);             }              private void updatedatagrid(string psqlstr)             {                 string connstr = "provider = microsoft.ace.oledb.12.0;" + "data source = stock.accdb";                 oledbdataadapter dadapter = new oledbdataadapter(psqlstr,connstr);                 dtable.clear();                 dadapter.fill(dtable);                 dadapter.dispose();                 dgvstock.datasource = dtable;             }         }     }


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