protected void RadGrid1_InsertCommand(object sender, Telerik.Web.UI.GridCommandEventArgs e)
	{
		GridEditFormItem item = (GridEditFormItem)e.Item;
		Contractors contractors = new Contractors();
		//Create the empty element that should be inserted.
		Customer customerToAdd = new Customer();
		int customerID;
		int.TryParse(contractors.GetAllCustomers().Last().CustomerID, out customerID);
		//Increment the PK field.
		customerToAdd.CustomerID = (++customerID).ToString();
		//Apply the vlaues from the editor controls.
		item.UpdateValues(customerToAdd);
		//Add the element.
		contractors.AddCustomer(customerToAdd);
	}