How to get One Colum Value from database selection of combox

Question

Gud morning Developer

 

i Have a Table (table name is customer)

      id int ,

     name varchar(20),

     address varchar(20) 

 

 

 

and i bind the database colum name from combobox in window application form

  combobox show value...... name

 

i want id from customer table and this id is show textbox... 

 

 

my problem is i  don't get id from customer table with the clik combobox  name

how to get id from database with tha combobox select item