DataGrid and CheckBoxes works but cant get each cell info

I am working on the rainbow portal and am able to include checkboxes in my datagrid. I want to dynamically have the checkboxes to put either a tick or stay unchecked depending on my database table.
I have already created a stored procedure and all to get the value from the datatable. But the problem is that i want to feed in some parameters in to the stored procedure at the Page_Load section of the page, and over there, it does not know what the DataGridEventsCommand arguments are..:
 Here is what I mean :

private void Page_Load(object sender, System.EventArgs e)
            {
                  // Put user code to initialize the page here
                  CDesignStoreDB oDS = new CDesignStoreDB();
                  DataGrid1.DataSource = oDS.GetInformation(ModuleID);
                  DataGrid1.DataBind();

                  DataGrid2.DataSource = oDS.GetLoanDetails(ModuleID);
                  DataGrid2.DataBind();

                  CheckBox hasTaken;
                  CheckBox hasReturned;
                  
                  //TableCell itemSN = e.Item.Cells[2]; //IT DOES NOT KNOW WHAT THIS IS
                  //TableCell itemPD = e.Item.Cells[3];//THIS WORKS ELSEWHERE IN EVENTS                                //                                                                             FUNCTIONS
            /*      string PackDescr = itemPD.Text;
                  string StudNo = itemSN.Text;
                  foreach(DataGridItem dgi in this.DataGrid2.Items)
                  {
                        hasTaken = (CheckBox) dgi.Cells[0].Controls[1];
                        
                        string hT = oDS.GetHasTaken(10239, PackDescr, StudNo);
                        if(hT == "YES")
                        {
                              hasTaken.Checked = Convert.ToBoolean(1);
                        }
                  }
            */      
                  if(!IsPostBack)
                  {
                        DataGrid1.DataSource = oDS.GetInformation(ModuleID);
                        DataGrid1.DataBind();

                        DataGrid2.DataSource = oDS.GetLoanDetails(ModuleID);
                        DataGrid2.DataBind();
                  }
            
            }

TableCell itemSN = e.Item.Cells[2]; does not know what 'e' in the context of the datagrid is. So, how can i get the values from the datagrid to assign the strings to them and feed them to the stored procedure function..!!???

Thanks