thanx for your replay .
i have check your links before but didn't help me
actually i don't want to save changes to server while pressing down or up arrows.
just i want to have the small red thing on the cell after going to next cell by the arrows.
because now when i putting a value to cell A then i press down arrow and finally my cell A will be empty , its like you didnt put any value to cell A.
i did a trick by calling
before activating next cell and i get what i want. but by this way i got scroll issues like if you have a long table then by pressing arrows to navigate to next cell then the grid scroll stays at middle of the screen always.
so this trick is not a real solution to my problem.
i appreciate your help.
waiting for you :)