protected selling_history Converttosellinghistory(ProductSellingEntity ob)
        {
            selling_history temphistory = new selling_history();
            temphistory.dealer_id = null;
            temphistory.product_id = ob.ProductId;
            temphistory.quantity = ob.Quantity;
            temphistory.credit = ob.Amount;
            temphistory.debit = 0;
            temphistory.transaction_type = (int)InventoryHelper.TransactionType.Credit;
            temphistory.customer_info = CustomerInfo;
            temphistory.payment_type = PaymentType.Content == null ? "" : PaymentType.Content.ToString();
            temphistory.payment_date = DateTime.Now;
            temphistory.customer_name = CustomerName;
            temphistory.remarks = Remarks;

            return temphistory;
        }
        protected ProductSellingEntity CoverttoProductSellingEntity(product ob)
        {

            ProductSellingEntity tempproduct = new ProductSellingEntity();
            tempproduct.ProductId = ob.id;
            tempproduct.ProductName = ob.product_name;
            tempproduct.Quantity = Quantity;
            tempproduct.SellingPrice = ob.sell_price;
            tempproduct.Amount = tempproduct.SellingPrice * Quantity;
            return tempproduct;
        }