private void calculate()
{
Util.isRequired(txtCostM.Text.Trim(), "Costo Material");
var plect = new PartListExchangeCompositeType();
var plem = new PartListExchangeManager();
plect.iIdExchange = int.Parse(lblIdExchange.Text.Trim());
plect.iIdPartList = int.Parse(ddlNoPartCot.SelectedValue.ToString());
lblTotalInvC.Text = plem.getSUMPartListExchange(plect).ToString();
lblTotalC.Text = (plem.getSUMPartListExchangeComponents(plect) + int.Parse(txtCostM.Text.Trim())).ToString();
}
