how to insert a datatable

hello,
i want to save a gridview data in datatable.
this is my syntax
Dim objDataAccess As New DataAccess() Dim objdt As New DataTable
Dim strSQL As String = "select a.Name AgentName,s.MSISDN1,s.ICCID from SIMCARDS S inner join Account A on a.AccountId = s.agentid where s.ICCID in(" + ICCIDMSISDN + ")" objdt = objDataAccess.ExecuteDataTable(strSQL) If objdt.Rows Is Nothing = False AndAlso objdt.Rows.Count > 0 Then GridView3.DataSource = objdt GridView3.DataBind()

i dont know how to save it
please help me out
thanks for the help