I am writing an vb.net application which will replace a legacy application written in ObjectPAL/Paradox. The problem is the performance issue. The old App is able to load the whole table(100,000 records) from Paradox database immediately. For the new vb.net App, it took about 7-10 seconds to load the same table from Oracle database.
First I tried to limit the records per page(load 100 records only) and add navigation buttons to enable the user to go through each page, but the users don' like the navigation buttons. They want to load the whole table just as the old App does.
I tried to create index on the table., and it makes no difference;
I moved from vb.net 2003 to vb.net 2005 to use DataGridView's virtual mode to load data, but it still take about 3-4 seconds to load into the form. Right now the users are complaining the speed of the new App.
Is there anything that I can do to improve the performance?