PetaPoco.NetCore

PetaPoco.NetCore 是基于PetaPoco的分支，主要增加对.netcore支持，也保留着PetaPoco原生的功能，支持单个实体对象映射，也支持多实体对象映射，NetCore未需指定驱动连接，其它API一致。

petapoco原项目地址:https://github.com/CollaboratingPlatypus/PetaPoco
PetaPoco.NetCore Nuget包下载地址： https://www.nuget.org/packages/PetaPoco.NetCore/
nuget安装 PM>Install-Package PetaPoco.NetCore

一、.netcore配置 (netcore configuration)
在project.json增加相应.netcore版本的数据库驱动引用，以mysql为例，这里mysql的驱动使用Pomelo.Data.MySql，mysql官方的netcore版本驱动兼容性太差，坑太多，等完善后可替换为官方的myssql core驱动
"dependencies": {
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
"Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc2-final",
"Microsoft.NETCore.App": {
"version": "1.0.0-rc2-3002702",
"type": "platform"
},
"Pomelo.Data.MySql": "1.0.0",
"System.Text.Encoding.CodePages": "4.0.1"
}

2.数据库连接信息可直接写在程序里，也可配置appsettings.json（建议配置）
"ConnectionStrings": {
"Conn": "server=localhost;database=test;uid=root;password=123456;charset=utf8;SslMode=None"
}

二、net framework配置 (net framework configuration)
在config 增加connectionStrings即可

<add name="Conn" connectionString="server=localhost;database=test;uid=root;password=123456;charset=utf8;"providerName="MySql.Data.MySqlClient"/>

<!--sqlserver-->
<!--<add name="Conn" connectionString="server=localhost;database=test;uid=sa;pwd=123456;Connect Timeout=180;Connection Lifetime=2000;packet size=4096" providerName="System.Data.SqlClient" />-->

三、使用 (use on project)

             MySqlConnection connection = new MySqlConnection(""server=localhost;database=test;uid=root;password=123456;charset=utf8;SslMode=None"");
            var db = new Database(connection);
            //实体测试
            Blog blog = new Blog() { BlogId = 3, Url = "test3" };
            //保存
            var result = db.Insert(blog);
              //编辑
            blog.Url = "test333";
            result = db.Update(blog);
               //删除
            result = db.Delete(blog);
            
            //sql测试
            var sql1 = Sql.Builder.Append("insert into blogs values(4,'test4')");
            result = db.Execute(sql1);
            var sql2 = Sql.Builder.Append("update blogs set Url='test444' where BlogId=4");
            result = db.Execute(sql2);
            
            //查询
            var model2 = db.SingleOrDefault<Blog>(1);
              //列表
            var list = db.Query<Blog>(Sql.Builder.Append("select * from blogs")).ToList();
              //分页
            var list2 = db.Page<Blog>(1, 2, Sql.Builder.Append("select * from blogs"));
              //查询
            var sql3 = Sql.Builder.Append("select * from blogs where BlogId=4");
            var model1 = db.Query<Blog>(sql3).FirstOrDefault();
            var model3 = db.FirstOrDefault<Blog>(sql3);
            
            //返回多个结果测试
            result = db.Fetch<post, author, post>(
            (p, a) =>
            {
                p.author_obj = a;
                return p;
            },
            @"SELECT * FROM post LEFT JOIN author ON post.author = author.id ORDER BY post.id");
            
            using (var multi = db.QueryMultiple("select * from post"))
            {
                result = multi.Read<post>().ToList();
            }
            using (var multi = db.QueryMultiple(@"SELECT * FROM post LEFT JOIN author ON post.author = author.id ORDER BY post.id"))
            {
                result = multi.Read<post, author, post>((p, a) => { p.author_obj = a; return p; }).ToList();
            }
            using (var multi = db.QueryMultiple("select * from post;select * from author;"))
            {
                var p = multi.Read<post>().First();
                var a = multi.Read<author>().First();
            }

测试sql
CREATE TABLE blogs (
BlogId int(11) NOT NULL PRIMARY KEY,
Url varchar(1000) DEFAULT NULL
);

create table post(
id int,
title varchar(32),
author int
);

drop table author;
create table author(
id int,
name varchar(32)
);
INSERT into blogs values(1,'test1'); INSERT into blogs values(2,'test2');

INSERT into author value(1,'作者1'); INSERT into author value(2,'作者2');

INSERT into post values(1,'book1',1); INSERT into post values(2,'book2',1); INSERT into post values(3,'book3',2); INSERT into post values(4,'book4',2);

更多api请参考petapoco文档
https://github.com/CollaboratingPlatypus/PetaPoco/wiki

by hoping [email protected]