[RESOLVED] Upadating a data base file after changing a value in a DataGridView control

[iliekater]

I have been trying desperately to update a data base file (Microsoft Access file) through a DataGridView control . Unfortunately there is something I am doing wrong . Maybe you can help me out ; after all , it's about a tiny code , so I guess the error should be very easy to spot .

As you can see , the form is very simple , containing only a button and the DataGridView control . Whenever I change anything on the DataGridView control and press the Update button , I get an error saying ""No value given for one or more parameters" .
Below there's a picture showing both my form and the whole code , along with the error message .
In case it is not possible to update a data base file through a DataGridView control , could you please tell how could I do it by code ?