How to make taext box work without removing cursor from the text box?

i have a text box, on text_changed event i get one data table which i bind with the grid view, but every time i have to move the cursor out then only it feteches the datatable, while i w开发者_如何学编程ant to make this search like if i as i change the character in the text box it keep working for all without removing the cursor from the text box, any suggestion how can i achieve this. Should i use any java script or what.

Have you tried using "onkeyup" or "onkeydown" rather than the changed event?