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Dapper的应用

时间:2019-04-17 12:33:30      阅读:121      评论:0      收藏:0      [点我收藏+]

标签:dapper   mes   HERE   sum   查询   lin   连接字符串   div   ret   

dapper开发效率极快so easy

using Dapper;
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;

namespace WcfServiceTest
{
/// <summary>
/// Dapper案例
/// </summary>
public class StudentDB
{
//获取web.config里的连接字符串
public static string connectionString = System.Configuration.ConfigurationManager.AppSettings["connectstring"];

/// <summary>
/// 查询指定数据
/// </summary>
/// <param name="person"></param>
/// <returns></returns>
public static List<Student> Query(string name)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
string strsql = "select * from Student where 1=1 ";
if (!string.IsNullOrEmpty(name))
{
strsql += "and Name like ‘%@Name%‘";
}
return connection.Query<Student>(strsql, name).ToList();
}
}

/// <summary>
/// 反填
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public static Student QueryById(int id)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
return connection.Query<Student>("select * from Student where Id=@Id", id).SingleOrDefault();
}
}

/// <summary>
/// 新增
/// </summary>
/// <param name="student"></param>
/// <returns></returns>
public static int Insert(Student student)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
return connection.Execute("insert into Student(Name,Age) values(@Name,@Age)", student);
}
}

public static int Update(Student student)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
return connection.Execute("update Studentset Name = @Name,Age= @Age where Id=@Id", student);
}
}

/// <summary>
/// 删除
/// </summary>
/// <param name="student"></param>
/// <returns></returns>
public static int Delete(int Id)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
return connection.Execute("delete from Student where Id=@Id", Id);
}
}

/// <summary>
/// 批量删除
/// </summary>
/// <param name="students"></param>
/// <returns></returns>
public static int Delete(List<Student> students)
{
using (IDbConnection connection = new SqlConnection(connectionString))
{
return connection.Execute("delete from Student where Id=@Id", students);
}
}

}
}

 

Dapper的应用

标签:dapper   mes   HERE   sum   查询   lin   连接字符串   div   ret   

原文地址:https://www.cnblogs.com/dujian123/p/10722644.html

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