loading gridview on textchanged event

i have a "textBox" and a gridview

now i want to create query on textBox's textchanged event

for example

i have a table "Employee" which contains the field "EmployeeNAme".
now i want to make query in such a way that. when ever i insert any character in the textbox the query give me the EmployeeName from the database to the gridview.

like

if i have a employee names (Aslam, AKram) both starting with A
now if i write A in the textbox the grid changes and displays both names from the database.

if hope u will have got ma question.
thanks in advance

plese reply me..i m new to this..

In textbox's textchanged event write this query

"Select EmployeeName from Employee where EmployeeName like '" + TextBox1.Text + "%'";