Non computer major, temporary to learn a little bit of fur do a query system,, every brother please give directions!!!!!!

want to input loop number, click the query button, will display the results of a query in the grid control, but the results of a query is not, please help to see where the problem is, be obliged!

This is the form



This is the code command1



This is to run the results



Beg you glad, don't suspicion I, I'm really not to learn the computer