using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Configuration;
using Dapper;
using System.Data;
using System.Data.SqlClient;
using DapperAppQueryMultiple.Model;

namespace DapperAppQueryMultiple
{
    class Program
    {
        static void Main(string[] args)
        {
            // 定義連接字符串
            string conn = ConfigurationManager.ConnectionStrings["AppConnection"].ConnectionString;
            using (IDbConnection connection = new SqlConnection(conn))
            {
                var sql = @"SELECT * FROM Users WHERE UserId=@UserId;
                            SELECT * FROM Product WHERE ProductId=@ProductId";
                var queryMulti = connection.QueryMultiple(sql, new { UserId = 1, ProductId=3 });

                // 注意：Read獲取的時(shí)候必須是按照上面返回表的順序 比如上面先查詢的Users表，那么Read的時(shí)候必須先返回Users表，否則返回沒(méi)有數(shù)據(jù)
                var users = queryMulti.Read<User>();
                var products = queryMulti.Read<Product>();
                Console.WriteLine("*****產(chǎn)品信息*****");
                // 循環(huán)遍歷輸出
                products.AsList<Product>().ForEach(p =>
                {
                    Console.WriteLine("產(chǎn)品名稱:"+p.ProductName+" 價(jià)格:"+p.Price);
                });
                Console.WriteLine("*****產(chǎn)品信息*****");

                Console.WriteLine("*****用戶信息*****");
                users.AsList<User>().ForEach(p => {
                    Console.WriteLine("用戶姓名:"+p.UserName+" 郵箱:"+p.Email+" 地址:"+p.Address);
                });
                Console.WriteLine("*****用戶信息*****");
            }


            Console.ReadKey();

        }
    }
}

程序運(yùn)行結(jié)果：

注意：Read獲取的時(shí)候必須是按照上面返回表的順序比如上面先查詢的Users表，那么Read的時(shí)候必須先返回Users表，否則返回沒(méi)有數(shù)據(jù)。Read<T>里面的T泛型類不一定要和數(shù)據(jù)庫(kù)表名相同，上面代碼的T泛型類是User，數(shù)據(jù)庫(kù)表名是Users。

下面的代碼演示返回順序不同：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Configuration;
using Dapper;
using System.Data;
using System.Data.SqlClient;
using DapperAppQueryMultiple.Model;

namespace DapperAppQueryMultiple
{
    class Program
    {
        static void Main(string[] args)
        {
            // 定義連接字符串
            string conn = ConfigurationManager.ConnectionStrings["AppConnection"].ConnectionString;
            using (IDbConnection connection = new SqlConnection(conn))
            {
                var sql = @"SELECT * FROM Users WHERE UserId=@UserId;
                            SELECT * FROM Product WHERE ProductId=@ProductId";
                var queryMulti = connection.QueryMultiple(sql, new { UserId = 1, ProductId=3 });

                // 先返回Product表的查詢數(shù)據(jù)
                var products = queryMulti.Read<Product>();
                var users = queryMulti.Read<User>();

                Console.WriteLine("*****產(chǎn)品信息*****");
                // 循環(huán)遍歷輸出
                products.AsList<Product>().ForEach(p =>
                {
                    Console.WriteLine("產(chǎn)品名稱:"+p.ProductName+" 價(jià)格:"+p.Price);
                });
                Console.WriteLine("*****產(chǎn)品信息*****");

                Console.WriteLine("*****用戶信息*****");
                users.AsList<User>().ForEach(p => {
                    Console.WriteLine("用戶姓名:"+p.UserName+" 郵箱:"+p.Email+" 地址:"+p.Address);
                });
                Console.WriteLine("*****用戶信息*****");
            }


            Console.ReadKey();

        }
    }
}

上面的代碼只是修改了返回表的數(shù)據(jù)，程序運(yùn)行結(jié)果如下：