public void setData(int transid, SQLConnector scon)
        {
            sCon = scon;
            dS = new DataSet();
            TransID = transid;
            if (transid >= 0)
            {
                lb_id.Text = "Trans-ID: " + transid;
            }

            //load DataSets
            sDA_offers = sCon.getOffers_List(dS, null);
            sDA_sellers = sCon.getSellers_List_FullName(dS, null);
            sDA_transaction = sCon.getTransaction(dS, "transaction", null, TransID);

            //set Data to Form-Elements
            lBox_offer.DataSource = dS.Tables["offers"];
            lBox_offer.DisplayMember = "OfferName";
            lBox_offer.ValueMember = "OfferID";
            lBox_seller.DataSource = dS.Tables["sellers"];
            lBox_seller.DisplayMember = "SellerName";
            lBox_seller.ValueMember = "SellerID";
            if (dS.Tables["transaction"].Rows.Count > 0)
            {
                lb_id.Text = "Trans-ID: " + dS.Tables["transaction"].Rows[0]["ID"];
                lBox_offer.SelectedValue = dS.Tables["transaction"].Rows[0]["offerID"];
                lBox_seller.SelectedValue = dS.Tables["transaction"].Rows[0]["sellerID"];
                nTB_contingent.Text = ((int)dS.Tables["transaction"].Rows[0]["seller_contingent"]).ToString();
            }
        }