D$.(18$ points$)$

There is a form like in the following figure. It contains three textboxes named as tbx$\_$cID, tbx$\_$Cname, tbx$\_$Credit and a button named as buttonSubmit.

When the button is clicked the data written to the textboxes will be entered to the table tblCOURSE in part B$.$ Write the necessary codes to obtain this result. Button click method is:

private void buttonSubmit click$($object sender$,$ e$)$

No need to write all of the code at the out of the upper method. Just write the code$($s$)$ that has to be written by the programmer.

Assume database name is midterm in IE$218$ server.