轻量级ORM框架Dapper应用三：使用Dapper实现In操作

IN 操作符允许我们在 WHERE 子句中规定多个值。

本篇文章中，还是使用和上篇文章中同样的实体类和数据库，Dapper使用in操作符的代码如下：

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

namespace DapperApplicationByIn
{
    class Program
    {
        static void Main(string[] args)
        {
            // 定义连接字符串
            string conn = ConfigurationManager.ConnectionStrings["AppConnection"].ConnectionString;

            #region in查询
            using (IDbConnection connection = new SqlConnection(conn))
            {
                var sql = "select * from Users where Email in @emails";
                var result = connection.Query<User>(sql, new { emails = new string[2] { "fqy@qq.com", "hyj@163.com" } });
                result.AsList().ForEach(p => 
                {
                    Console.WriteLine("Id:"+p.UserId+" UserName:"+p.UserName+" Email:"+p.Email+" Address:"+p.Address);
                });
            }
            #endregion

            Console.ReadKey();
        }
    }
}

 程序运行结果：

示例代码下载地址：https://pan.baidu.com/s/1o7RokDs