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[] { "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