高性能 Sqlite ORM 框架之 sqliteSugar

2018-09-06 11:28

阅读:477

  一、简介

  easyliter框架的升级版本,并且正式命名为SqliteSugar框架,另外Sugar系列还有 MySql和MsSql版本,Oracle版本待开发中(因为客户端太大一直在忧郁当中)

  用Sqlite 也不址什么高性能了,好用为主。

  经过一天的努力,Sqlite 版本所有的例子都已经测试通过:

  MySql .NET 4.0+

  MSQL .NET 4.0+下载地址:

  MSSQL .NET Core版本

   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

   SqliteSugar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,同时兼容 Where("Id>@id",new{id=1}) 这种字符串的写法

   //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().ToList(); var studentDynamic = db.Queryable().ToDynamic(); var studentJson = db.Queryable().ToJson(); //查询单条 var single = db.Queryable().Single(c => c.id == 1); //查询单条没有记录返回空对象 var single2 = db.Queryable().Where(c => c.id == 1).SingleOrDefault(); //查询第一条 var first = db.Queryable().Where(c => c.id == 1).First(); var first2 = db.Queryable().Where(c => c.id == 1).FirstOrDefault(); //取10-20条 var page1 = db.Queryable().Where(c => c.id > 2).OrderBy(it=>it.id).Skip(2).Take(3).ToList(); //上一句的简化写法,同样取10-20条 var page2 = db.Queryable().Where(c => c.id > 10).OrderBy(it => it.id).Skip(2).ToList(); //取前2条 var take = db.Queryable().Where(c => c.id > 10).OrderBy(it => it.id).Take(2).ToList(); // Not like string conval = "三"; var notLike = db.Queryable().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().Where(c => c.name == "a".ToString()).ToList(); var convert2 = db.Queryable().Where(c => c.id == Convert.ToInt32("1")).ToList();// var convert3 = db.Queryable().Where(c => DateTime.Now > Convert.ToDateTime("2015-1-1")).ToList(); var convert4 = db.Queryable().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().Where(c => "a" == "a").Where("id>100").ToList(); var student13 = db.Queryable().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().Any(c => c.id == 100); bool isAny1 = db.Queryable().Any(c => c.id == 1); int maxId = db.Queryable().Max("id"); int minId = db.Queryable().Where(c => c.id > 0).Min("id"); //order By var orderList = db.Queryable().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().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 list0 = db.Queryable().In(it => it.id, intArray).ToList(); var list2 = db.Queryable().In("id", intArray).ToList(); var list3 = db.Queryable().In(it => it.id, intList).ToList(); var list4 = db.Queryable().In("id", intList).ToList(); //分组查询 var list7 = db.Queryable().Where(c => c.id < 20).GroupBy(it => it.sex).Select("sex,count(*) as Count").ToDynamic(); var list8 = db.Queryable().Where(c => c.id < 20).GroupBy(it => it.sex).GroupBy(it => it.id).Select("id,sex, count(*) as Count").ToDynamic(); List list9 = db.Queryable().Where(c => c.id < 20).GroupBy(it => it.sex).Select("Sex, count(*) as Count").ToList(); List list10 = db.Queryable().Where(c => c.id < 20).GroupBy("sex").Select("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 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("st.*", new { id = 1 }); //多表分页 List 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("st.*", "s.id", 1, 10); //多表分页WHERE加子查询 List 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("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("s").Join("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"); } var pars = new { id = id, name = name }; int pageCount = sable.Count(pars); var list7 = sable.SelectToPageList("s.*","l.id desc",1,20, pars); }

   3、对原生SQL查询 using (var db = SugarDao.GetInstance()) { //转成list List list1 = db.SqlQuery("select * from Student"); //转成list带参 List list2 = db.SqlQuery("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("select id from Student limit 0,1").First(); //反回键值 Dictionary list6 = db.SqlQuery>("select id,name from Student").ToDictionary(it => it.Key, it => it.Value); //反回List var list7 = db.SqlQuery("select name from Student").First(); //存储过程 //var spResult = db.SqlQuery("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().Where(c => c.id < 10).Select(c => new { newid = c.id, newname = c.name, xx_name = c.name }).ToDynamic();//匿名类转换 } View Code

   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 = 1; using (var db = SugarDao.GetInstance()) { //指定列更新 db.Update(new { name = "蓝翔2" }, it => it.id == id); db.Update(new { name = "蓝翔2" }, 1, 3, 12); db.Update(new { name = "蓝翔2" }, new string[] { "1", "2" }); //整个实体更新 db.Update(new School { id = id, name = "蓝翔2" }); db.Update(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 = 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。 } 更新

   三、删除 using (var db = SugarDao.GetInstance()) { //真删除 db.Delete(10);//注意主键必需为实体类的第一个属性 db.Delete(it => it.id > 100); db.Delete(new string[] { "100", "101", "102" }); //假删除 //db.FalseDelete("is_del", 100); //等同于 update school set is_del=0 where id in(100) //db.FalseDelete("is_del", it=>it.id==100); } 删除

   四、插入 Student s = new Student() { name = "张ert(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 list = new List() { new Student() { name="张"+new Random().Next(1,int.MaxValue) }, new Student() { name="张"+new Random().Next(1,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(new Student() { sch_id = SchoolEnum.蓝翔2 }); db.Update(new Student() { sch_id=SchoolEnum.蓝翔2 , id=1} ); var stuList2 = db.Queryable().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 /// 过滤器 /// 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().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().Where("id=@id",new{id=1}) //sqlable var list2 = db.Sqlable().From("s").SelectToList("*"); //同上 //sqlQuery var list3 = db.SqlQuery("select * from Student where 1=1"); //同上 } } } /// /// 扩展SqlSugarClient /// public class SugarDaoFilter { //禁止实例化 private SugarDaoFilter() { } /// /// 页面所需要的过滤函数 /// private static Dictionary> _filterParas = new Dictionary>() { { "role",()=>{ return new KeyValueObj(){ Key=" id=@id" , Value=new{ id=1}}; } }, { "org",()=>{ return new KeyValueObj(){ Key=" orgId=@orgId" , Value=new{ orgId=1}}; } }, }; 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("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 mappingTableList = new List(){ 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andTimeOut = 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mitTran();//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("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"); }


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