高性能ORM 框架之 MySqlSugar

mysql 3.X API地址：  http://www.cnblogs.com/sunkaixuan/p/5987308.html

MySqlSugar 1.5 API

一、介简

SqlSugar ORM框架一直在升级当中，昨天将EMIT架构进行了重构，让类型转换更加智能，EMIT转换后的性能和原生ADO同水准(以前只是接近)，为了提高性能、稳定、有问必答、有需求必改、坚持更新。例如数据库类型为BIT我们在程序里面可以使用 INT接收也可以用BOOL接收，不影响一丝性能，这些都是SQLSUGAR以前没有的功能。

经过一天的努力，MySql版本所有的例子都已经测试通过：

MySql .NET 4.0+

https://github.com/sunkaixuan/MySqlSugar

MySql .NET CORE

下周更新

MSQL .NET 4.0+下载地址：

https://github.com/sunkaixuan/SqlSugar

MSSQL .NET Core版本

https://github.com/sunkaixuan/ASP_NET_CORE_ORM_SqlSugar

优点：

1、优越的性能，查询使用  reflection.emit 创建IL语言+委托绑定 然后对该对象进行 cache ,datareader直接赋值给cache对象,高性能拉姆达解析，查询速度达到原生最高性能的写法水准

2、大量语法糖，拉姆达表达示筛选，新颖的多表查询 ，方便的分页等

3、支持事务

4、内置实体类生成函数，无需使用第三方代码生成器

5、简单好用、例子齐全有问必答。

组成：

sqlSugar是由sqlSugarClient提供统一调用模式 ，sqlSugarClient是由5个部分组成

1、自身函数

2、实体生成

3、单表查询

4、多表查询

5、基类函数

MySql教程

和MSSQL版本基本一样但是个别例子也会有些细节上的区别

一、查询

1、拉姆达查询（以后会支持多表JOIN）

语法简洁和EF相似，但有区别的SqlSugar更适合字符串操作，例如Where("Id>@id",new{id=1})

   //针对单表或者视图查询
               var dt=  db.GetDataTable("select * from Student");
                //查询所有
                var student = db.Queryable<Student>().ToList();
                var studentDynamic = db.Queryable<Student>().ToDynamic();
                var studentJson = db.Queryable<Student>().ToJson();

                //查询单条
                var single = db.Queryable<Student>().Single(c => c.id == );
                //查询单条没有记录返回空对象
                var single2 = db.Queryable<Student>().Where(c => c.id == ).SingleOrDefault();

                //查询第一条
                var first = db.Queryable<Student>().Where(c => c.id == ).First();
                var first2 = db.Queryable<Student>().Where(c => c.id == ).FirstOrDefault();

                //取10-20条
                var page1 = db.Queryable<Student>().Where(c => c.id > ).OrderBy(it=>it.id).Skip().Take().ToList();

                //上一句的简化写法，同样取10-20条
                var page2 = db.Queryable<Student>().Where(c => c.id > ).OrderBy(it => it.id).ToPageList(, );

                //查询条数
                var count = db.Queryable<Student>().Where(c => c.id > ).Count();

                //从第2条开始以后取所有
                var skip = db.Queryable<Student>().Where(c => c.id > ).OrderBy(it => it.id).Skip().ToList();

                //取前2条
                var take = db.Queryable<Student>().Where(c => c.id > ).OrderBy(it => it.id).Take().ToList();

                // Not like
                string conval = "三";
                var notLike = db.Queryable<Student>().Where(c => !c.name.Contains(conval.ToString())).ToList();
                //Like
                conval = "三";
                var like = db.Queryable<Student>().Where(c => c.name.Contains(conval)).ToList();

                // 可以在拉姆达使用 ToString和 Convert,比EF出色的地方
                var convert1 = db.Queryable<Student>().Where(c => c.name == "a".ToString()).ToList();
                var convert2 = db.Queryable<Student>().Where(c => c.id == Convert.ToInt32("")).ToList();//
                var convert3 = db.Queryable<Student>().Where(c => DateTime.Now > Convert.ToDateTime("2015-1-1")).ToList();
                var convert4 = db.Queryable<Student>().Where(c => DateTime.Now > DateTime.Now).ToList();

                //支持字符串Where 让你解决，更复杂的查询
                var student12 = db.Queryable<Student>().Where(c => "a" == "a").Where("id>100").ToList();
                var student13 = db.Queryable<Student>().Where(c => "a" == "a").Where("id>100 and id in( select 1)").ToList();

                //存在记录反回true，则否返回false
                bool isAny100 = db.Queryable<Student>().Any(c => c.id == );
                bool isAny1 = db.Queryable<Student>().Any(c => c.id == );

                int maxId = db.Queryable<Student>().Max<Student, int>("id");
                int minId = db.Queryable<Student>().Where(c => c.id > ).Min<Student, int>("id");

                //order By
                var orderList = db.Queryable<Student>().OrderBy("id desc,name asc").ToList();//字符串支持多个排序
                //可以多个order by表达示
                var order2List = db.Queryable<Student>().OrderBy(it => it.name).OrderBy(it => it.id, OrderByType.desc).ToList(); // order by name as ,order by id desc

                //In
                var intArray = new[] { "", "", "" };
                var intList = intArray.ToList();
                var list0 = db.Queryable<Student>().In(it => it.id, , , ).ToList();
                var list1 = db.Queryable<Student>().In(it => it.id, intArray).ToList();
                var list2 = db.Queryable<Student>().In("id", intArray).ToList();
                var list3 = db.Queryable<Student>().In(it => it.id, intList).ToList();
                var list4 = db.Queryable<Student>().In("id", intList).ToList();

                //分组查询
                var list7 = db.Queryable<Student>().Where(c => c.id < ).GroupBy(it => it.sex).Select("sex,count(*) as Count").ToDynamic();
                var list8 = db.Queryable<Student>().Where(c => c.id < ).GroupBy(it => it.sex).GroupBy(it => it.id).Select("id,sex, count(*) as Count").ToDynamic();
                List<SexTotal> list9 = db.Queryable<Student>().Where(c => c.id < ).GroupBy(it => it.sex).Select<Student, SexTotal>("Sex, count(*) as Count").ToList();
                List<SexTotal> list10 = db.Queryable<Student>().Where(c => c.id < ).GroupBy("sex").Select<Student, SexTotal>("Sex, count(*) as Count").ToList();
                //SELECT Sex,Count=count(*)  FROM Student  WHERE 1=1  AND  (id < 20)    GROUP BY Sex --生成结果

2、sqlable 接近SQL的一个路线。

放弃了传统的EF写法，让他更接近SQL，可以取代传统的SQL拼接，让格式更好控。

 using (var db = SugarDao.GetInstance())
            {
                //---------Sqlable,创建多表查询---------//

                //多表查询
                List<School> dataList = db.Sqlable()
                   .From("school", "s")
                   .Join("student", "st", "st.id", "s.id", JoinType.INNER)
                   .Join("student", "st2", "st2.id", "st.id", JoinType.LEFT)
                   .Where("s.id>100 and s.id<@id")
                   .Where("1=1")//可以多个WHERE
                   .OrderBy("id")
                   .SelectToList<School/*新的Model我这里没有所以写的School*/>("st.*", new { id =  });

                //多表分页
                List<School> dataPageList = db.Sqlable()
                    .From("school", "s")
                    .Join("student", "st", "st.id", "s.id", JoinType.INNER)
                    .Join("student", "st2", "st2.id", "st.id", JoinType.LEFT)
                    .Where("s.id>100 and s.id<100")
                    .SelectToPageList<School>("st.*", "s.id", , );

                //多表分页WHERE加子查询
                List<School> dataPageList2 = db.Sqlable()
                    .From("school", "s")
                    .Join("student", "st", "st.id", "s.id", JoinType.INNER)
                    .Join("student", "st2", "st2.id", "st.id", JoinType.LEFT)
                    .Where("s.id>100 and s.id<100 and s.id in (select 1 )" /*这里面写子查询都可以*/)
                    .SelectToPageList<School>("st.*", "s.id", , );

                //--------转成List Dynmaic 或者 Json-----//

                //不分页
                var list1 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToDynamic("*", new { id =  });
                var list2 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToJson("*", new { id =  });
                var list3 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToDataTable("*", new { id =  });

                //分页
                var list4 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToPageDynamic("s.*", "l.id", , , new { id =  });
                var list5 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToPageTable("s.*", "l.id", , , new { id =  });
                var list6 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToPageDynamic("s.*", "l.id", , , new { id =  });

                //--------拼接-----//
                Sqlable sable = db.Sqlable().From<Student>("s").Join<School>("l", "s.sch_id", "l.id", JoinType.INNER);
                string name = "a";
                int id = ;
                if (!string.IsNullOrEmpty(name))
                {
                    sable = sable.Where("s.name=@name");
                }
                if (!string.IsNullOrEmpty(name))
                {
                    sable = sable.Where("s.id=@id or s.id=100");
                }

                var pars = new { id = id, name = name };
                int pageCount = sable.Count(pars);
                var list7 = sable.SelectToPageList<Student>("s.*","l.id desc",,, pars);

            }

3、对原生SQL查询

 using (var db = SugarDao.GetInstance())
            {
                //转成list
                List<Student> list1 = db.SqlQuery<Student>("select * from Student");
                //转成list带参
                List<Student> list2 = db.SqlQuery<Student>("select * from Student where id=@id", new { id =  });
                //转成dynamic
                dynamic list3 = db.SqlQueryDynamic("select * from student");
                //转成json
                string list4 = db.SqlQueryJson("select * from student");
                //返回int
                var list5 = db.SqlQuery<int>("select  id from Student limit 0,1").First();
                //反回键值
                Dictionary<string, string> list6 = db.SqlQuery<KeyValuePair<string, string>>("select id,name from Student").ToDictionary(it => it.Key, it => it.Value);
                //反回List<string[]>
                var list7 = db.SqlQuery<string[]>("select  name from Student").First();
                //存储过程
                //var spResult = db.SqlQuery<School>("exec sp_school @p1,@p2", new { p1=1,p2=2 });
            }

4、容器的转换

   using (SqlSugarClient db = SugarDao.GetInstance())
            {
                var list2= db.Queryable<Student>().Where(c => c.id < ).Select(c => new classNew { newid = c.id, newname = c.name, xx_name = c.name }).ToList();//不支持匿名类转换,也不建议使用

                var list3 = db.Queryable<Student>().Where(c => c.id < ).Select(c => new   { newid = c.id, newname = c.name, xx_name = c.name }).ToDynamic();//匿名类转换
            }

二、更新

可以指定列更新，也可对实体整个更新，也可以排除不更新字段非常的方便好用

 int id = ;
            using (var db = SugarDao.GetInstance())
            {
                //指定列更新
                db.Update<School>(new { name = "蓝翔2" }, it => it.id == id);
                db.Update<School, int>(new { name = "蓝翔2" }, , , );
                db.Update<School, string>(new { name = "蓝翔2" }, new string[] { "", "" });

                //整个实体更新
                db.Update(new School { id = id, name = "蓝翔2" });
                db.Update<School>(new School { id = id, name = "蓝翔2" }, it => it.id == id);

                //设置不更新列
                db.DisableUpdateColumns = new string[] { "CreateTime" };//设置CreateTime不更新

                TestUpdateColumns updObj = new TestUpdateColumns()
                {
                    VGUID = Guid.Parse("6DF396EB-D1C8-48A5-8BE1-D58D685646A7"),
                    Name = "xx",
                    Name2 = "xx2",
                    IdentityField = ,
                    CreateTime = null
                };

                //CreateTime将不会被更新
                db.Update(updObj);
                //以前实现这种更新需要用指定列的方式实现，现在就简单多了。

            }

更新

三、删除

 using (var db = SugarDao.GetInstance())
            {
                //真删除
                db.Delete<Student, int>();//注意主键必需为实体类的第一个属性
                db.Delete<School>(it => it.id > );
                db.Delete<School, string>(new string[] { "", "", "" });

                //假删除
                //db.FalseDelete<school>("is_del", 100);
                //等同于 update school set is_del=0 where id in(100)
                //db.FalseDelete<school>("is_del", it=>it.id==100);
            }

删除

四、插入

Student s = new Student()
                {
                    name = "张" + new Random().Next(, int.MaxValue)
                };

                db.Insert(s); //插入一条记录 (有主键也好，没主键也好，有自增列也好都可以插进去)

                List<Student> list = new List<Student>()
                {
                     new Student()
                {
                     name="张"+new Random().Next(,int.MaxValue)
                },
                 new Student()
                {
                     name="张"+new Random().Next(,int.MaxValue)
                }
                };

                db.InsertRange(list); //批量插入

插入

五、枚举支持

 using (SqlSugarClient db = SugarDao.GetInstance())
            {
                var stuList= db.Queryable<Student>().ToList();
                db.Insert<Student>(new Student() { sch_id = SchoolEnum.蓝翔2 });
                db.Update<Student>(new Student() {  sch_id=SchoolEnum.蓝翔2 , id=} );
                var stuList2 = db.Queryable<Student>().Where(it=>it.sch_id==SchoolEnum.蓝翔1).ToList();
            }

枚举

六、实体生成

 using (var db = SugarDao.GetInstance())
            {

                //根据当前数据库生成所有表的实体类文件 （参数：SqlSugarClient ，文件目录，命名空间）
                db.ClassGenerating.CreateClassFiles(db,"e:\\mysqlModel","Models");
                //根据表名生成实体类文件
                //db.ClassGenerating.CreateClassFilesByTableNames(db, Server.MapPath("~/Models"), "Models" , "student","school");

                //根据表名生成class字符串
                var str = db.ClassGenerating.TableNameToClass(db, "Student");

                //根据SQL语句生成class字符串
                var str2 = db.ClassGenerating.SqlToClass(db, "select   * from Student", "student");
            }

实体生成

除了上面代码还有T4生成看DEMO不懂可以随时问我

七、全局过滤器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MySqlSugar;
using Models;

namespace WebTest.Demo
{
    /// <summary>
    /// 过滤器
    /// </summary>
    public partial class Filter : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            using (SqlSugarClient db = SugarDaoFilter.GetInstance())//开启数据库连接
            {
                //设置走哪个过滤器
                db.CurrentFilterKey = "role";

                //queryable
                var list = db.Queryable<Student>().ToList(); //通过全局过滤器对需要权限验证的数据进行过滤
                //相当于db.Queryable<Student>().Where("id=@id",new{id=1})

                //sqlable
                var list2 = db.Sqlable().From<Student>("s").SelectToList<Student>("*");
                //同上

                //sqlQuery
                var list3 = db.SqlQuery<Student>("select * from Student where 1=1");
                //同上
            }
        }
    }
    /// <summary>
    /// 扩展SqlSugarClient
    /// </summary>
    public class SugarDaoFilter
    {
        //禁止实例化
        private SugarDaoFilter()
        {

        }
        /// <summary>
        /// 页面所需要的过滤函数
        /// </summary>
        private static Dictionary<string, Func<KeyValueObj>> _filterParas = new Dictionary<string, Func<KeyValueObj>>()
        {
          { "role",()=>{
                    return new KeyValueObj(){ Key=" id=@id" , Value=new{ id=}};
               }
          },
          { "org",()=>{
                    return new KeyValueObj(){ Key=" orgId=@orgId" , Value=new{ orgId=}};
              }
          },
        };
        public static SqlSugarClient GetInstance()
        {
            string connection = System.Configuration.ConfigurationManager.ConnectionStrings[@"sqlConn"].ToString(); //这里可以动态根据cookies或session实现多库切换
            var reval = new SqlSugarClient(connection);
            reval.SetFilterFilterParas(_filterParas);
            return reval;
        }
    }
}

过滤器

八、别名表

 using (SqlSugarClient db = SugarDao.GetInstance())
            {

                //-----单个-------//
                var list = db.Queryable<V_Student>("Student").ToList();//查询的是 select * from student 而我的实体名称为V_Student

                //-----全局多个设置-------//

                //设置 Mapping Table 如果没这方面需求可以传NULL
                List<KeyValue> mappingTableList = new List<KeyValue>(){
                new KeyValue(){ Key="FormAttr", Value="Flow_FormAttr"},
                new KeyValue(){ Key="Student3", Value="Student"}
                };
                db.SetMappingTables(mappingTableList);
            }

别名表

九、事务

using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
            {
                db.IsNoLock = true;//启用无锁查询
                db.CommandTimeOut = ;//设置超时时间
                try
                {
                    db.BeginTran();//开启事务
                    //db.BeginTran(IsolationLevel.ReadCommitted);+3重载可以设置事世隔离级别

                    db.CommitTran();//提交事务
                }
                catch (Exception)
                {
                    db.RollbackTran();//回滚事务
                    throw;
                }
            }

十、保留了ADO功能

 using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
            {
               var r1= db.GetDataTable("select * from student");
               var r2= db.GetSingle<Student>("select   * from student limit 0,1");
               var r3 = db.GetScalar("select  count(1) from student");
               var r4 = db.GetReader("select  count(1) from student");
               r4.Dispose();
               var r5 = db.GetString("select   name from student limit 0,1");
               var r6 = db.ExecuteCommand("select 1");
            }

MySql版已经发布到Nuget，方便大家下载