Forms Data Controls :: Gridview - Save Selected Values And Checked Boxes In Database

I have a gridview and users would select some records and would click on the submit button and i will be saving those records into database using a stored proc.... now .... just below the gridview and above the submit button there are few checkboxes by default they wud be checked. How would i save the selected values and the checked boxes in database i wrote the stored proc for the gridview but how would i save the checked checkboxes into the same table.

For i As Integer = 0 To gvSelectScreen.Rows.Count - 1
Dim chkTemp As CheckBox = TryCast(gvSelectScreen.Rows(i).FindControl("cbStatus"), CheckBox)
If chkTemp.Checked Then
ContractNumber = gvSelectScreen.Rows(i).Cells(0).Text
ClientProgramNumber = gvSelectScreen.Rows(i).Cells(1).Text
ClientProgramName = gvSelectScreen.Rows(i).Cells(2).Text
StartDate = CType(gvSelectScreen.Rows(i).FindControl("txtStartDate"), TextBox).Text
EndDate = gvSelectScreen.Rows(i).Cells(5).Text
Dim connStr As String = ConfigurationManager.ConnectionStrings("MainConnectionString").ConnectionString
Dim myCon As New SqlConnection(connStr)
Dim cmd As New SqlCommand("usp_ParametersFromGrid")
Dim dt As New DataTable
cmd.CommandType = CommandType.StoredProcedure
cmd.Parameters.Add("@ContractNumber", SqlDbType.VarChar, 22).Value = ContractNumber.ToString()
cmd.Parameters.Add("@ClientProgramNumber", SqlDbType.VarChar, 22).Value = ClientProgramNumber.ToString()
cmd.Parameters.Add("@ClientProgramName", SqlDbType.VarChar, 100).Value = ClientProgramName.ToString()
cmd.Parameters.Add("@StartDate", SqlDbType.VarChar, 20).Value = StartDate.ToString()
cmd.Parameters.Add("@EndDate", SqlDbType.VarChar, 20).Value = EndDate.ToString()
cmd.Parameters.Add("@RequestID", SqlDbType.VarChar, 50).Value = RequestID.ToString()
cmd.Connection = myCon
myCon.Open()
cmd.ExecuteNonQuery()
myCon.Close()
End If

Now above the submit button as i said, there are few checkboxes and they are checked by default...how would i save the selected item (in the gridview and the checked checkbox values in the same row in the database(sql server)