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：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 using System.Configuration;
 7 using Dapper;
 8 using System.Data.SqlClient;
 9 using System.Data;
10 using DapperApplicationByIn.Model;
11 
12 namespace DapperApplicationByIn
13 {
14     class Program
15     {
16         static void Main(string[] args)
17         {
18             // 定义连接字符串
19             string conn = ConfigurationManager.ConnectionStrings["AppConnection"].ConnectionString;
20 
21             #region in查询
22             using (IDbConnection connection = new SqlConnection(conn))
23             {
24                 var sql = "select * from Users where Email in @emails";
25                 var result = connection.Query<User>(sql, new { emails = new string[2] { "fqy@qq.com", "hyj@163.com" } });
26                 result.AsList().ForEach(p => 
27                 {
28                     Console.WriteLine("Id:"+p.UserId+" UserName:"+p.UserName+" Email:"+p.Email+" Address:"+p.Address);
29                 });
30             }
31             #endregion
32 
33             Console.ReadKey();
34         }
35     }
36 }

 程序运行结果：

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