Adding information to a DataTable using textfields

Question

Hey guys, 

 

I am working on a project where I need to create my own employee management system.

I created a datatable and connected it to my datagridview.

 

I need to allow the user to add information to the system. For this, I added multiple text boxes (ID, Name, Contact_Number...etc)

How do I get to add the information entered by the user to enter the datatable/datagridview (or both).

 

Thanks in advance :)