private DataTable SaveGridviewData()
{
DataTable dataTable = FileClass.AddColumns();
foreach (GridViewRow gvRow in gvStrategy.Rows)
{
CheckBox chkDelete = gvRow.Cells[DELETE_COL_INDEX].FindControl("chkDelete") as CheckBox;
DropDownList ddlExpiryDates = gvRow.Cells[EXP_DATE_COL_INDEX].FindControl("ddlExpiryDates") as DropDownList;
DropDownList ddlContractType = gvRow.Cells[CONTRACT_TYP_COL_INDEX].FindControl("ddlContractType") as DropDownList;
DropDownList ddlTransactionType = gvRow.Cells[TRANSTYP_COL_INDEX].FindControl("ddlTransactionType") as DropDownList;
DropDownList ddlStrikePrice = gvRow.Cells[SP_COL_INDEX].FindControl("ddlStrikePrice") as DropDownList;
TextBox txtPremium = gvRow.Cells[PREMINUM_COL_INDEX].FindControl("txtPremium") as TextBox;
DropDownList ddlLots = gvRow.Cells[LOTS_COL_INDEX].FindControl("ddlLots") as DropDownList;
dataTable.Rows.Add(chkDelete.Checked, ddlExpiryDates.SelectedValue, ddlContractType.SelectedValue, ddlTransactionType.SelectedValue,
ddlStrikePrice.SelectedValue, "", txtPremium.Text, ddlLots.SelectedValue, "", "", "", "", "", "", "",
"", "", "", "", "", "", "", "", "", "", "", "", "", "");
}
return(dataTable);
}