KeyPress event in ComboBox

Question

Hi,

I am working on Combobox.

I need to search by typing the character in the combobox by using linq.

I am using a gridview to display the data fro a table. 

i have written the following code under ComboBox_KeyPres  event

 

{

string combotext = comboBox1.Text;

dataGridView1.DataSource = from em in dc.emps where em.dept.Contains(combotext ) select em;

}

 

once i enter the character like 'A','D'  etc the value is not getting stored in the variable Combotext.

after the keypress event is completed the value is getting stored into the variable.

 

I want the value to stored immediately after entering it into the Combobox.

 

Thank you