[开源ORM] SqliteSugar 3.x .net Core版本成功上线

SqliteSqlSugar 3.X API

作为支持.NET CORE 为数不多的ORM之一，除了具有优越的性能外，还拥有强大的功能，不只是满足你的增,删,查和改。实质上拥有更多你想像不到的功能,当你需要实现某个功能时会发现有这个功能太棒了。

因为每个版本的贴子API都基本一致，所以我也说一些别的用法让大家更加了解该ORM

参数多元化的支持：

//Queryable 支持 拉姆达 匿名参数  和字典参数
var list = db.Queryable<Student>().Where(it=>it.id==1).ToList();
var list2=db.Queryable<Student>().Where("id=@id", new { id = 1 }).ToList();
var list3 = db.Queryable<Student>().Where("id=@id", new Dictionary<string, object>() { {"id",1}}).ToList();


//原生Sql查询支持 匿名对象，SqlParameter和 字典
db.SqlQuery<Student>("select * from student where id=@id", new { id = 1 });
db.SqlQuery<Student>("select * from student where id=@id", new SqlParameter("@id",1));
db.SqlQuery<Student>("select * from student where id=@id", new Dictionary<string, object>() { { "id", 1 } });

//同上
//db.GetScalar()
//db.ExecuteCommand()
//db.GetInt（）
//...

SQL语句使用拉姆达的技巧

 db.Queryable<Student>("(select * from [Student] ) t").Where(it => it.name == "name").ToList();

注意: 这种写法表名一定要加上关键字不然应会让转释成 [(select * from [Student] ) t]

Mssql表名关键字是 []

MySql表名关键字是``

Sqlite表名关键字是[]

ORACLE表名只要大写就可以了

所有版本

ASP.NET 4.0+ MSSQL https://github.com/sunkaixuan/SqlSugar

ASP.NET CORE MSSQL https://github.com/sunkaixuan/ASP_NET_CORE_ORM_SqlSugar

ASP.NET 4.0+ MYSQL https://github.com/sunkaixuan/MySqlSugar

ASP.NET CORE MYSQL https://github.com/sunkaixuan/ASP_NET_CORE_ORM_MySqlSugar

ASP.NET 4.0+ Sqlite https://github.com/sunkaixuan/SqliteSugar

ASP.NET CORE Sqlite https://github.com/sunkaixuan/ASP_NET_CORE_ORM_MySqlSugar

ASP.NET 4.0+ ORACLE https://github.com/sunkaixuan/OracleSugar

ASP.NET Core Oracle 等官方驱动代码已完成

优点

SqlSugar 是一款小巧，并且功能齐全的ORM，并不需要像Dapper一样依赖第三方扩展

SqlSugar 语法易用简单，有漂亮的拉姆达语法，也支持Dapper SQL和ADO.NET（存储过程等）的所有功能

SqlSugar 性能达到原生水准，远超 Dapper和EF CORE。

SqlSugar 支持.NET CORE , 多个数据库

SqlSugar 体积小巧只有150K是EF的30分之1 ，NUGET直接可以下载

连接数据库

1.简单用法

using(var db = new SqlSugarClient(ConnectionString)){

    //use object
    var list=db.Queryable<T>().ToList();

}

2.打包用法，推荐

/// <summary>
/// SqlSugar
/// </summary>
public class SugarDao
{
    private SugarDao()
    {

    }
    public static string ConnectionString
    {
        get
        {
            string reval = "server=.;uid=sa;pwd=sasa;database=SqlSugarTest"; 
            return reval;
        }
    }
    public static SqlSugarClient GetInstance()
    {
        var db = new SqlSugarClient(ConnectionString);
        db.IsEnableLogEvent = true;//Enable log events
        db.LogEventStarting = (sql, par) => { Console.WriteLine(sql + " " + par+"
"); };
        return db;
    }
}

使用打包对象

using (var db = SugarDao.GetInstance())
{
    var list=db.Queryable<T>().ToList();
}

3.高级玩法，基于IOC和指挥官模式的DEMO

https://github.com/sunkaixuan/ASPNETMVCCRUDDEMO

查询

1. Queryable 拉姆达查询

                //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 == 1);
                //查询单条根据主键
                var singleByPk = db.Queryable<Student>().InSingle(1);
                //查询单条没有记录返回空对象
                var singleOrDefault = db.Queryable<Student>().SingleOrDefault(c => c.id == 11111111);
                //查询单条没有记录返回空对象
                var single2 = db.Queryable<Student>().Where(c => c.id == 1).SingleOrDefault();

                //查询第一条
                var first = db.Queryable<Student>().Where(c => c.id == 1).First();
                var first2 = db.Queryable<Student>().Where(c => c.id == 1).FirstOrDefault();

                //取11-20条
                var page1 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Skip(10).Take(10).ToList();

                //取11-20条  等于 Skip(pageIndex-1)*pageSize).Take(pageSize) 等于  between (pageIndex-1)*pageSize and  pageIndex*pageSize
                var page2 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).ToPageList(2, 10);

                //查询条数
                var count = db.Queryable<Student>().Where(c => c.id > 10).Count();

                //从第2条开始以后取所有
                var skip = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Skip(2).ToList();

                //取前2条
                var take = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Take(2).ToList();

                //Not like 
                string conval = "a";
                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();

                //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>@id", new { id = 1 }).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 == 100);
                bool isAny1 = db.Queryable<Student>().Any(c => c.id == 1);


                //获取最大Id
                object maxId = db.Queryable<Student>().Max(it => it.id);
                int maxId1 = db.Queryable<Student>().Max(it => it.id).ObjToInt();//拉姆达
                int maxId2 = db.Queryable<Student>().Max<int>("id"); //字符串写法

                //获取最小
                int minId1 = db.Queryable<Student>().Where(c => c.id > 0).Min(it => it.id).ObjToInt();//拉姆达
                int minId2 = db.Queryable<Student>().Where(c => c.id > 0).Min<int>("id");//字符串写法


                //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[] { "5", "2", "3" };
                var intList = intArray.ToList();
                var listnew = db.Queryable<Student>().Where(it => intArray.Contains(it.name)).ToList();
                var list0 = db.Queryable<Student>().In(it => it.id, 1, 2, 3).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();
                var list6 = db.Queryable<Student>().In(intList).ToList();//不设置字段默认主键

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



                //2表关联查询
                var jList = db.Queryable<Student>()
                .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) //默认left join
                .Where<School>((s1, s2) => s1.id == 1)
                .Select("s1.*,s2.name as schName")
                .ToDynamic();

                /*等于同于
                 SELECT s1.*,s2.name as schName 
                 FROM [Student]  s1 
                 LEFT JOIN [School]  s2 ON  s1.sch_id  = s2.id 
                 WHERE  s1.id  = 1 */

                //2表关联查询并分页
                var jList2 = db.Queryable<Student>()
                .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) //默认left join
                    //如果要用inner join这么写
                    //.JoinTable<School>((s1, s2) => s1.sch_id == s2.id ,JoinType.INNER)
                .Where<School>((s1, s2) => s1.id > 1)
                .OrderBy(s1 => s1.name)
                .Skip(10)
                .Take(20)
                .Select("s1.*,s2.name as schName")
                .ToDynamic();

                //3表查询并分页
                var jList3 = db.Queryable<Student>()
               .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) // left join  School s2  on s1.id=s2.id
               .JoinTable<School>((s1, s3) => s1.sch_id == s3.id) // left join  School s3  on s1.id=s3.id
               .Where<School>((s1, s2) => s1.id > 1)  // where s1.id>1
               .Where(s1 => s1.id > 0)
               .OrderBy<School>((s1, s2) => s1.id) //order by s1.id 多个order可以  .oderBy().orderby 叠加 
               .Skip(10)
               .Take(20)
               .Select("s1.*,s2.name as schName,s3.name as schName2")//select目前只支持这种写法
               .ToDynamic();


                //上面的方式都是与第一张表join，第三张表想与第二张表join写法如下
                List<V_Student> jList4 =
                 db.Queryable<Student>()
                 .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) // left join  School s2  on s1.id=s2.id
                 .JoinTable<School, Area>((s1, s2, a1) => a1.id == s2.AreaId)// left join  Area a1  on a1.id=s2.AreaId  第三张表与第二张表关联
                 .JoinTable<Area, School>((s1, a1, s3) => a1.id == s3.AreaId)// left join  School s3  on a1.id=s3.AreaId  第四第表第三张表关联
                 .JoinTable<School>((s1, s4) => s1.sch_id == s4.id) // left join  School s2  on s1.id=s4.id
                 .Select<School, Area, V_Student>((s1, s2, a1) => new V_Student { id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name }).ToList();

                //等同于
                //SELECT id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name  
                //FROM [Student]   s1 
                //LEFT JOIN School  s2 ON  ( s1.sch_id  = s2.id )    
                //LEFT JOIN Area  a1 ON  ( a1.id  = s2.AreaId )     //第三张表与第二张表关联
                //LEFT JOIN School  s3 ON  ( a1.id  = s3.AreaId )   //第四张表与第三张表关联
                //LEFT JOIN School  s4 ON  ( s1.sch_id  = s4.id )    
                //WHERE 1=1    


                //Join子查询语句加分页的写法
                var childQuery = db.Queryable<Area>().Where("id=@id").Select(it => new { id = it.id }).ToSql();//创建子查询SQL
                string childTableName =SqlSugarTool.PackagingSQL(childQuery.Key);//将SQL语句用()包成表
                var queryable = db.Queryable<Student>()
                 .JoinTable<School>((s1, s2) => s1.sch_id == s2.id)  //LEFT JOIN School  s2 ON  ( s1.sch_id  = s2.id )  
                 .JoinTable(childTableName, "a1", "a1.id=s2.areaid", new { id = 1 }, JoinType.INNER) //INNER JOIN (SELECT *  FROM [Area]   WHERE 1=1  AND id=@id   ) a1 ON a1.id=s2.areaid
                 .OrderBy(s1 => s1.id);

                var list = queryable.Select<School, Area, V_Student>((s1, s2, a1) => new V_Student { id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name })
                    .ToPageList(0, 200);
                var count2 = queryable.Count();


                //拼接例子
                var queryable2 = db.Queryable<Student>().Where(it => true);
                if (maxId.ObjToInt() == 1)
                {
                    queryable2.Where(it => it.id == 1);
                }
                else
                {
                    queryable2.Where(it => it.id == 2);
                }
                var listJoin = queryable2.ToList();


                //queryable和SqlSugarClient解耦
                var par = new Queryable<Student>().Where(it => it.id == 1);//声名没有connection对象的Queryable
                par.DB = db;
                var listPar = par.ToList();


                //查看生成的sql和参数
                var id = 1;
                var sqlAndPars = db.Queryable<Student>().Where(it => it.id == id).OrderBy(it => it.id).ToSql();



                //拉姆达支持的函数操作
                var par1 = "2015-1-1"; var par2 = "   我 有空格A, ";
                var r1 = db.Queryable<Student>().Where(it => it.name == par1.ObjToString()).ToList(); //ObjToString会将null转转成""
                var r2 = db.Queryable<InsertTest>().Where(it => it.d1 == par1.ObjToDate()).ToList();
                var r3 = db.Queryable<InsertTest>().Where(it => it.id == 1.ObjToInt()).ToList();//ObjToInt会将null转转成0
                var r4 = db.Queryable<InsertTest>().Where(it => it.id == 2.ObjToDecimal()).ToList();
                var r5 = db.Queryable<InsertTest>().Where(it => it.id == 3.ObjToMoney()).ToList();
                var r6 = db.Queryable<InsertTest>().Where(it => it.v1 == par2.Trim()).ToList();
                var convert1 = db.Queryable<Student>().Where(c => c.name == "a".ToString()).ToList();
                var convert2 = db.Queryable<Student>().Where(c => c.id == Convert.ToInt32("1")).ToList();
                var convert3 = db.Queryable<Student>().Where(c => c.name == par2.ToLower()).ToList();
                var convert4 = db.Queryable<Student>().Where(c => c.name == par2.ToUpper()).ToList();
                var convert5= db.Queryable<Student>().Where(c => DateTime.Now > Convert.ToDateTime("2015-1-1")).ToList();
                var c1 = db.Queryable<Student>().Where(c => c.name.Contains("a")).ToList();
                var c2 = db.Queryable<Student>().Where(c => c.name.StartsWith("a")).ToList();
                var c3 = db.Queryable<Student>().Where(c => c.name.EndsWith("a")).ToList();
                var c4 = db.Queryable<Student>().Where(c => !string.IsNullOrEmpty(c.name)).ToList();
                var c5 = db.Queryable<Student>().Where(c => c.name.Equals("小杰")).ToList();
                var c6 = db.Queryable<Student>().Where(c => c.name.Length > 4).ToList();
                var time = db.Queryable<InsertTest>().Where(c => c.d1>DateTime.Now.AddDays(1)).ToList();
                var time2 = db.Queryable<InsertTest>().Where(c => c.d1 > DateTime.Now.AddYears(1)).ToList();
                var time3 = db.Queryable<InsertTest>().Where(c => c.d1 > DateTime.Now.AddMonths(1)).ToList();

2. SqlQuery 原生SQL查询

                //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 = 1 });
                //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").SingleOrDefault();
                //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  id,name from Student limit 0,1").SingleOrDefault();
                //存储过程
                //var spResult = db.SqlQuery<School>("exec sp_school @p1,@p2", new { p1 = 1, p2 = 2 });

                //存储过程加Output 
                //var pars = SqlSugarTool.GetParameters(new { p1 = 1,p2=0 }); //将匿名对象转成SqlParameter
                //db.IsClearParameters = false;//禁止清除参数
                //pars[1].Direction = ParameterDirection.Output; //将p2设为 output
                //var spResult2 = db.SqlQuery<School>("exec sp_school @p1,@p2 output", pars);
                //db.IsClearParameters = true;//启用清除参数
                //var outPutValue = pars[1].Value;//获取output @p2的值


                ////存储过程优化操作
                //var pars2 = SqlSugarTool.GetParameters(new { p1 = 1, p2 = 0 }); //将匿名对象转成SqlParameter
                //db.CommandType = CommandType.StoredProcedure;//指定为存储过程可比上面少写EXEC和参数
                //var spResult3 = db.SqlQuery<School>("sp_school", pars2);
                //db.CommandType = CommandType.Text;//还原回默认


                //获取第一行第一列的值
                string v1 = db.GetString("select '张三' as name");
                int v2 = db.GetInt("select 1 as name");
                double v3 = db.GetDouble("select 1 as name");
                decimal v4 = db.GetDecimal("select 1 as name");

3.Sqlable 高级SQL拼接器

      //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 = 1 });

                //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", 1, 10);

                //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", 1, 10);



                //--------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 = 1 });
                var list2 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToJson("*", new { id = 1 });
                var list3 = db.Sqlable().From("student", "s").Join("school", "l", "s.sch_id", "l.id and l.id=@id", JoinType.INNER).SelectToDataTable("*", new { id = 1 });

                //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", 1, 10, new { id = 1 });
                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", 1, 10, new { id = 1 });
                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", 1, 10, new { id = 1 });


                //--------拼接-----//
                Sqlable sable = db.Sqlable().From<Student>("s").Join<School>("l", "s.sch_id", "l.id", JoinType.INNER);
                string name = "a";
                int id = 1;
                if (!string.IsNullOrEmpty(name))
                {
                    sable = sable.Where("s.name=@name");
                }
                if (!string.IsNullOrEmpty(name))
                {
                    sable = sable.Where("s.id=@id or s.id=100");
                }
                if (id > 0)
                {
                    sable = sable.Where("l.id in(1)");//where加子查询
                }
                var pars = new { id = id, name = name };
                int pageCount = sable.Count(pars);
                var list7 = sable.SelectToPageList<Student>("s.*", "l.id desc", 1, 20, pars);

View Code

插入

支持了高性能批量插入，让你事办功倍

 db.Insert(GetInsertItem()); //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)


                db.InsertRange(GetInsertList()); //批量插入 支持（别名表等功能）


                db.SqlBulkCopy(GetInsertList()); //批量插入 适合海量数据插入



                //设置不插入列
                db.DisableInsertColumns = new string[] { "sex" };//sex列将不会插入值
                Student s = new Student()
                {
                    name = "张" + new Random().Next(1, int.MaxValue),
                    sex = "gril"
                };

                var id = db.Insert(s); //插入

                //查询刚插入的sex是否有值
                var sex = db.Queryable<Student>().Single(it => it.id == id.ObjToInt()).sex;//无值
                var name = db.Queryable<Student>().Single(it => it.id == id.ObjToInt()).name;//有值


                //SqlBulkCopy同样支持不挺入列设置
                db.SqlBulkCopy(GetInsertList());

更新

                //指定列更新
                db.Update<School>(new { name = "蓝翔14" }, it => it.id == 14); //只更新name列
                db.Update<School, int>(new { name = "蓝翔11 23 12", areaId = 2 }, 11, 23, 12);
                db.Update<School, string>(new { name = "蓝翔2" }, new string[] { "11", "21" });
                db.Update<School>(new { name = "蓝翔2" }, it => it.id == 100);
                var array=new int[]{1,2,3};
                db.Update<School>(new { name = "蓝翔2" }, it => array.Contains(it.id));// id in 1,2,3


                //支持字典更新，适合动态权限
                var dic = new Dictionary<string, string>();
                dic.Add("name", "第十三条");
                dic.Add("areaId", "1");
                db.Update<School, int>(dic, 13);


                //整个实体更新
                db.Update(new School { id = 16, name = "蓝翔16", AreaId = 1 });
                db.Update<School>(new School { id = 12, name = "蓝翔12", AreaId = 2 }, it => it.id == 18);
                db.Update<School>(new School() { id = 11, name = "青鸟11" });

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

                TestUpdateColumns updObj = new TestUpdateColumns()
                {
                    VGUID = Guid.Parse("542b5a27-6984-47c7-a8ee-359e483c8470"),
                    Name = "xx",
                    Name2 = "xx2",
                    IdentityField = 0,
                    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。



                //批量更新   数据量小时建议使用
                var updateResult = db.UpdateRange(GetUpdateList());

                //批量更新  数据量大时建议使用
                var updateResult2 = db.SqlBulkReplace(GetUpdateList2());

删除

                //删除根据主键
                db.Delete<School, int>(10);

                //删除根据表达示
                db.Delete<School>(it => it.id > 100);//支持it=>array.contains(it.id)
 
                //主键批量删除
                db.Delete<School, string>(new string[] { "100", "101", "102" });

                //非主键批量删除
                db.Delete<School, string>(it => it.name, new string[] { "" });
                db.Delete<School, int>(it => it.id, new int[] { 20, 22 });


                //根据实体赋值实体一定要有主键，并且要有值。
                db.Delete(new School() { id = 200 });

                //根据字符串删除
                db.Delete<School>("id=@id", new { id = 100 });

                //假删除
                //db.FalseDelete<school>("is_del", 100);
                //等同于 update school set is_del=1 where id in(100)
                //db.FalseDelete<school>("is_del", it=>it.id==100);

更多功能

1、枚举支持

  var stuList = db.Queryable<Student>().ToList();
                db.Insert<Student>(new Student() { sch_id = SchoolEnum.北大青鸟 });
                db.Update<Student>(new Student() { sch_id = SchoolEnum.it清华, id = 11 });
                var stuList2 = db.Queryable<Student>().Where(it => it.sch_id == SchoolEnum.全智).ToList();

View Code

2、实体生成加T4

View Code

使用T4

详细教程：

http://www.cnblogs.com/sunkaixuan/p/5751503.html

3、ADO.NET

                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");


                //参数支持
                var p1 = db.GetDataTable("select * from student where id=@id", new {id=1 });
                var p2 = db.GetDataTable("select * from student where id=@id", new Dictionary<string, object>() { { "id", "1" } });//目前只支持 Dictionary<string, object>和Dictionary<string, string>
                var p3 = db.GetDataTable("select * from student where id=@id", new MySqlParameter("@id",1) );

4、日志记录功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;

namespace NewTest.Demos
{
    //日志记录功能
    public class Log : IDemos
    {
       
        public void Init()
        {
            Console.WriteLine("启动Log.Init");
            using (var db = SugarDemoDao.GetInstance())
            {

                var a1 = db.Queryable<Student>().Where(it => it.id == 1).ToList();
                var a2 = db.Queryable<Student>().OrderBy(it => it.id).ToList();
            }
        }

        public class SugarConfigs
        {
            public static Action<string, string> LogEventStarting = (sql, pars) =>
            {
                Console.WriteLine("starting:" + sql + " " + pars);
                
                using (var db = SugarDemoDao.GetInstance())
                {
                    //日志记录件事件里面用到数据库操作 IsEnableLogEvent一定要为false否则将引起死循环，并且要新开一个数据实例 像我这样写就没问题。
                    db.IsEnableLogEvent = false;
                    db.ExecuteCommand("select 1");
                }
            };
            public static Action<string, string> LogEventCompleted = (sql, pars) =>
            {
                Console.WriteLine("completed:" + sql + " " + pars);
            };
        }

        /// <summary>
        /// SqlSugar
        /// </summary>
        public class SugarDemoDao
        {

            public static SqlSugarClient GetInstance()
            {
                var db = new SqlSugarClient(SugarDao.ConnectionString);
                db.IsEnableLogEvent = true;//启用日志事件
                db.LogEventStarting = SugarConfigs.LogEventStarting;
                db.LogEventCompleted = SugarConfigs.LogEventCompleted;
                return db;
            }
        }
    }
}

5、别名表功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;
namespace NewTest.Demos
{
    //别名表的功能
    public class MappingTable : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动MappingTable.Init");

            //单个设置
            using (var db = SugarDao.GetInstance())
            {
                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
            }


            //全局设置
            using (var db = SugarFactory.GetInstance())
            {
                var list = db.Queryable<V_Student>().ToList();//查询的是 select * from student 而我的实体名称为V_Student
            }
        }


        /// <summary>
        /// 全局配置类
        /// </summary>
        public class SugarConfigs
        {
            //key类名 value表名
            public static List<KeyValue> MpList = new List<KeyValue>(){
            new KeyValue(){ Key="FormAttr", Value="Flow_FormAttr"},
            new KeyValue(){ Key="Student3", Value="Student"},
            new KeyValue(){ Key="V_Student", Value="Student"}
            };
        }

        /// <summary>
        /// SqlSugar实例工厂
        /// </summary>
        public class SugarFactory
        {

            //禁止实例化
            private SugarFactory()
            {

            }
            public static SqlSugarClient GetInstance()
            {
                string connection = SugarDao.ConnectionString; //这里可以动态根据cookies或session实现多库切换
                var db = new SqlSugarClient(connection);

                db.SetMappingTables(SugarConfigs.MpList);//设置关联表 (引用地址赋值，每次赋值都只是存储一个内存地址)



                //批量设置别名表
                //db.ClassGenerating.ForeachTables(db, tableName =>
                //{
                //    db.AddMappingTable(new KeyValue() { Key = tableName.Replace("bbs.",""), Value =  tableName }); //key实体名，value表名
                //});


                return db;
            }
        }
    }
}

View Code

6、别名列功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using System.Data.SqlClient;
using MySqlSugar;
namespace NewTest.Demos
{
    //别名列的功能
    public class MappingColumns : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动MappingColumns.Init");

            //全局设置
            using (var db = SugarFactory.GetInstance())
            {
                var list = db.Queryable<Student>().Where(it=>it.classId==1).ToList();
            }
        }

        public class Student
        {

            //id
            public int classId { get; set; }

            //name
            public string className { get; set; }

            //sch_id
            public int classSchoolId { get; set; }

            public int isOk { get; set; }
        }

        /// <summary>
        /// 全局配置别名列（不区分表）
        /// </summary>
        public class SugarConfigs
        {
            //key实体字段名 value表字段名 ，KEY唯一否则异常
            public static List<KeyValue> MpList = new List<KeyValue>(){
            new KeyValue(){ Key="classId", Value="id"},
            new KeyValue(){ Key="className", Value="name"},
            new KeyValue(){ Key="classSchoolId", Value="sch_id"}
            };
        }

        /// <summary>
        /// SqlSugar实例工厂
        /// </summary>
        public class SugarFactory
        {

            //禁止实例化
            private SugarFactory()
            {

            }
            public static SqlSugarClient GetInstance()
            {
                string connection = SugarDao.ConnectionString; //这里可以动态根据cookies或session实现多库切换
                var db = new SqlSugarClient(connection);
                //注意：只有启动属性映射才可以使用SetMappingColumns
                db.IsEnableAttributeMapping = true;
                db.SetMappingColumns(SugarConfigs.MpList);//设置关联列 (引用地址赋值，每次赋值都只是存储一个内存地址)
                return db;
            }
        }
    }
}

View Code

7、通过属性来设置别名表和别名列

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;
namespace NewTest.Demos
{
    //通过属性的方法设置别名表和别名字段（主键和自添列都无需设置 SQLSUGAR会帮你自动处理）
    //注意:【属性映射和 (SetMappingTables、SetMappingColumns)方式映射 2种选其中一，不清楚底层缓存机质不建议同时使用】
    public class AttributesMapping : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动AttributesMapping.Init");
            using (var db = DBManager.GetInstance())
            {

                //查询
                var list = db.Queryable<TestStudent>()
                    .Where(it => it.className.Contains("小")).OrderBy(it => it.classSchoolId).Select<V_Student>(it => new V_Student() { id = it.classId, name = it.className }).ToList();
                var list2 = db.Queryable<TestStudent>()
                    .JoinTable<TestSchool>((s1, s2) => s1.classSchoolId == s2.classId)
                    .OrderBy<TestSchool>((s1, s2) => s1.classId)
                    .Select<TestStudent, TestSchool, V_Student>((s1, s2) => new V_Student() { id = s1.classId, name = s1.className, SchoolName = s2.className }).ToList();

                //添加
                TestStudent s = new TestStudent();
                s.className = "属性名";
                s.classSchoolId = 1;
                var id = db.Insert(s);
                s.classId = id.ObjToInt();


                db.SqlBulkCopy(new List<TestStudent>() { s });


                //更新
                db.Update(s);
                db.Update<TestStudent, int>(s, 100);
                db.Update<TestStudent>(s, it => it.classId == 100);
                db.SqlBulkReplace(new List<TestStudent>() { s });

                //删除
                db.Delete<TestStudent>(it => it.classId == 100);

                //根据实体赋值实体一定要有主键，并且要有值。
                db.Delete(new TestStudent() {  classId = 200 });
            }
        }

        /// <summary>
        /// 属性只作为初始化映射，SetMappingTables和SetMappingColumns可以覆盖
        /// </summary>
        [SugarMapping(TableName = "Student")]
        public class TestStudent
        {

            [SugarMapping(ColumnName = "id")]
            public int classId { get; set; }

            [SugarMapping(ColumnName = "name")]
            public string className { get; set; }

            [SugarMapping(ColumnName = "sch_id")]
            public int classSchoolId { get; set; }

            public int isOk { get; set; }

            /// <summary>
            /// 数据库并没有这一列
            /// </summary>
            public string errorField { get; set; }
        }

 
        [SugarMapping(TableName = "School")]
        public class TestSchool
        {

            [SugarMapping(ColumnName = "id")]
            public int classId { get; set; }

            [SugarMapping(ColumnName = "name")]
            public string className { get; set; }

            public int AreaId = 1;
        }
    }

    public class DBManager
    {

        public static SqlSugarClient GetInstance()
        {
            var db = new SqlSugarClient(SugarDao.ConnectionString);
            db.IsEnableAttributeMapping = true;//启用属性映射
            db.IsIgnoreErrorColumns = true;//忽略非数据库列



            db.IsEnableLogEvent = true;//启用日志事件
            db.LogEventStarting = (sql, par) => { Console.WriteLine(sql + " " + par + "
"); };


            return db;
        }
    }
}

View Code

8、行列过滤 (行过滤器可以设置多个，以逗号隔开)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;

namespace NewTest.Demos
{
    //行过滤加列过滤
    //权限管理的最佳设计
    public class Filter2 : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动Filter2.Init");
            using (SqlSugarClient db = SugarDaoFilter.GetInstance())//开启数据库连接
            {
                //设置走哪个过滤器
                db.CurrentFilterKey = "role1";
                //queryable
                var list = db.Queryable<Student>().ToJson(); //where id=1 , 可以查看id和name


                //设置走哪个过滤器
                db.CurrentFilterKey = "role2";
                //queryable
                var list2 = db.Queryable<Student>().ToJson(); //where id=2 , 可以查看name

            }
        }
        /// <summary>
        /// 扩展SqlSugarClient
        /// </summary>
        public class SugarDaoFilter
        {
            //禁止实例化
            private SugarDaoFilter()
            {

            }
            /// <summary>
            /// 页面所需要的过滤行
            /// </summary>
            private static Dictionary<string, Func<KeyValueObj>> _filterRos = new Dictionary<string, Func<KeyValueObj>>()
            {
              { "role1",()=>{
                        return new KeyValueObj(){ Key=" id=@id" , Value=new{ id=1}};
                   }
              },
              { "role2",()=>{
                  return new KeyValueObj() { Key = " id=@id", Value = new { id = 2 } };
                  }
              },
            };
            /// <summary>
            /// 页面所需要的过滤列
            /// </summary>
            private static Dictionary<string, List<string>> _filterColumns = new Dictionary<string, List<string>>()
            {
              { "role1",new List<string>(){"id","name"}
              },
              { "role2",new List<string>(){"name"}
              },
            };
            public static SqlSugarClient GetInstance()
            {
                string connection = SugarDao.ConnectionString; //这里可以动态根据cookies或session实现多库切换
                var db = new SqlSugarClient(connection);

                //支持sqlable和queryable
                db.SetFilterFilterParas(_filterRos);

                //列过滤只支持queryable
                db.SetFilterFilterParas(_filterColumns);


                db.IsEnableLogEvent = true;//启用日志事件
                db.LogEventStarting = (sql, par) => { Console.WriteLine(sql + " " + par + "
"); };
                return db;
            }
        }
    }
}

View Code

9、自动排除非数据库列

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;

namespace NewTest.Demos
{
    //排除错误列
    public class IgnoreErrorColumns : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动IgnoreErrorColumns.Init");
            using (var db = SugarDao.GetInstance())
            {
                db.IsIgnoreErrorColumns = true;

                //Student表并没有 AreaName
               var id=  db.Insert<STUDENT>(new STUDENT() { name = "张三", AreaName = "北大" });


                db.Update<STUDENT>(new STUDENT() { id=id.ObjToInt() ,name = "张三2", AreaName = "北大" });
            }
        }
        public class STUDENT {
            /// <summary>
            /// Desc:- 
            /// Default:- 
            /// Nullable:False 
            /// </summary>
            public int id { get; set; }

            /// <summary>
            /// Desc:- 
            /// Default:- 
            /// Nullable:True 
            /// </summary>
            public string name { get; set; }

            /// <summary>
            /// Desc:学校ID 
            /// Default:- 
            /// Nullable:True 
            /// </summary>
            public int? sch_id { get; set; }

            /// <summary>
            /// Desc:- 
            /// Default:- 
            /// Nullable:True 
            /// </summary>
            public string sex { get; set; }

            /// <summary>
            /// Desc:- 
            /// Default:- 
            /// Nullable:True 
            /// </summary>
            public Boolean? isOk { get; set; }

            public string SchoolName { get; set; }

            public string AreaName { get; set; }

            public string SubjectName { get; set; }
        }
    }
}

View Code

10、事务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;

namespace NewTest.Demos
{
    //事务
    public class Tran : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动Tran.Init");
            using (SqlSugarClient db = SugarDao.GetInstance())//开启数据库连接
            {
                db.IsNoLock = true;//启用无锁查询
                db.CommandTimeOut = 30000;//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;
                }
            }
        }
    }
}

11、流水号功能

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NewTest.Dao;
using Models;
using System.Data.SqlClient;
using MySqlSugar;

namespace NewTest.Demos
{
    //流水号的功能
    public class SerialNumber : IDemos
    {

        public void Init()
        {
            Console.WriteLine("启动SerialNumber.Init");
            using (SqlSugarClient db = SugarFactory.GetInstance())//开启数据库连接
            {
                var dientityValue = db.Insert<Student>(new Student() {   });
                var name = db.Queryable<Student>().Single(it => it.id == dientityValue.ObjToInt()).name;
                Console.WriteLine(name);

                var dientityValue2 = db.Insert<School>(new School() { });
                var name2 = db.Queryable<School>().Single(it => it.id == dientityValue2.ObjToInt()).name;
                Console.WriteLine(name2); ;
            }
        }

        /// <summary>
        /// 全局配置类
        /// </summary>
        public class SugarConfigs
        {
            public static List<PubModel.SerialNumber> NumList = new List<PubModel.SerialNumber>(){
              new PubModel.SerialNumber(){TableName="Student", FieldName="name", GetNumFunc=()=>{ //GetNumFunc在没有事中使用
                  return "stud-"+DateTime.Now.ToString("yyyy-MM-dd");
              }},
                new PubModel.SerialNumber(){TableName="School", FieldName="name",  GetNumFuncWithDb=db=>{ //事务中请使用GetNumFuncWithDb保证同一个DB对象,不然会出现死锁
                  return "ch-"+DateTime.Now.ToString("syyyy-MM-dd");
              }}
            };
        }

        /// <summary>
        /// SqlSugar实例工厂
        /// </summary>
        public class SugarFactory
        {

            //禁止实例化
            private SugarFactory()
            {

            }
            public static SqlSugarClient GetInstance()
            {
                string connection = SugarDao.ConnectionString; //这里可以动态根据cookies或session实现多库切换
                var db = new SqlSugarClient(connection);
                db.SetSerialNumber(SugarConfigs.NumList);//设置流水号
                return db;
            }
        }
    }
}

View Code

12添加VS知能提示，让你立马上手。

http://www.cnblogs.com/sunkaixuan/p/5851425.html

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原文地址：https://www.cnblogs.com/sunkaixuan/p/6003528.html