when selecting a date from datetimepicker, respective data present in database of that particular date should display in datagridview using c#.net windows form

Hi Everyone,

              I'm developing 1 windows application to my own Finance branch office itseems..In this I'm trying to display data's which are stored in database and Exporting that data's into EXCEL as well. I used Datagridview for displaying data's and I can export selected rows into excel as well..

               Here my issue is I want to display the rows in datagridview with respect to selecting a date form datetimepicker and I should export only those particular data's into EXCEL Report.. I would like to use Checkboxes in Datagridview for selecting the rows ...I don't know how to achive this..could any 1 help me out...