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Dapper Multi Join

Adventurous Ant answered on April 13, 2023 Popularity 2/10 Helpfulness 1/10

answer Dapper Multi Join

Dapper Multi Join

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 public List<Model_Orders_received> GetOrders(int orderid2)
        {
            string sql = $"SELECT o.*,d.*,c.* from orders o LEFT JOIN ordersdetails d ON d.orderid = o.orderid join customers c on c.customerid=o.customerid  where o.orderid={orderid2}";

            var ProductDictionary = new Dictionary<int, Model_Orders_received>();
            var CustomerDictionary = new Dictionary<int,ordersdetails_received>();

            using (IDbConnection dbConnection = new MySqlConnection(connection))
            {
                IEnumerable<Model_Orders_received> result = dbConnection.Query<Model_Orders_received, ordersdetails_received,customers_received, Model_Orders_received>(sql, (prod, productVar,cus) =>
                {
                    Model_Orders_received product;
                
                    if (!ProductDictionary.TryGetValue(prod.orderid, out product))
                    {
                        product = prod;
                       
                        product.ordersdetails = new List<ordersdetails_received>();
                        product.customers = cus;


                        ProductDictionary.Add(product.orderid, product);
                    }
                    if (productVar.orderid > 0) product.ordersdetails.Add(productVar);
                    return product;
                }, splitOn: "orderid,customerid");

                var products = result.Distinct().ToList();
                return products;
            }

        }

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Contributed on Apr 13 2023

Adventurous Ant

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