public void GetTaxAndFee()
{
//应付应收款
textEditNeedToPay.EditValue = inoutHelper.CalcTaxTotalFee(gvProductSJ);
//合计金额
textEditTotalFee.EditValue = inoutHelper.CalcTaxTotalFee(gvProductSJ);
//税额
textEditAmountTax.EditValue = inoutHelper.CalcAmountTax(gvProductSJ);
//本次收支款
textEditPayThisTime.EditValue = 0.0;
//折扣金额
textEditDiscountFee.EditValue = 0.0;
}