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一、引入PetaPoco.NetCore，PetaPoco.NetCore 是基于PetaPoco的轻量ORM，支持.netframework和.netcore，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。
github地址：https://github.com/qingask/PetaPoco.NetCore
nugut地址：https://www.nuget.org/packages/PetaPoco.NetCore
通过nuget安装 PM>Install-Package PetaPoco.NetCore
二、.netcore配置
在project.json增加相应.netcore版本的数据库驱动引用，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"
}
三、使用PetaPoco.NetCore
1.测试sql
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);
2.使用PetaPoco.NetCore
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();
}
[原创].netcore通过PetaPoco操作mysql、sqlserver等
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原文地址：http://www.cnblogs.com/qingask/p/5877253.html
