![N[开源].NET CORE与MySql更配, MySqlSugar ORM框架 3.x](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1 "N[开源].NET CORE与MySql更配, MySqlSugar ORM框架 3.x")
MySqlSugar 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。
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
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+"\r\n"); };
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 = }); //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");
}
if (id > )
{
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", , , pars);
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(, 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 == ); //只更新name列
db.Update<School, int>(new { name = "蓝翔11 23 12", areaId = }, , , );
db.Update<School, string>(new { name = "蓝翔2" }, new string[] { "", "" });
db.Update<School>(new { name = "蓝翔2" }, it => it.id == );
var array=new int[]{,,};
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", "");
db.Update<School, int>(dic, ); //整个实体更新
db.Update(new School { id = , name = "蓝翔16", AreaId = });
db.Update<School>(new School { id = , name = "蓝翔12", AreaId = }, it => it.id == );
db.Update<School>(new School() { id = , 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 = ,
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>(); //删除根据表达示
db.Delete<School>(it => it.id > );//支持it=>array.contains(it.id) //主键批量删除
db.Delete<School, string>(new string[] { "", "", "" }); //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[] { , }); //根据实体赋值实体一定要有主键，并且要有值。
db.Delete(new School() { id = }); //根据字符串删除
db.Delete<School>("id=@id", new { id = }); //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 = });
var stuList2 = db.Queryable<Student>().Where(it => it.sch_id == SchoolEnum.全智).ToList();
2、实体生成加T4
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= });
var p2 = db.GetDataTable("select * from student where id=@id", new Dictionary<string, object>() { { "id", "" } });//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",) );
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 == ).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;
}
}
}
}
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==).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;
}
}
}
}
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 = ;
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, );
db.Update<TestStudent>(s, it => it.classId == );
db.SqlBulkReplace(new List<TestStudent>() { s }); //删除
db.Delete<TestStudent>(it => it.classId == ); //根据实体赋值实体一定要有主键，并且要有值。
db.Delete(new TestStudent() { classId = });
}
} /// <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 = ;
}
} 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 + "\r\n"); }; return db;
}
}
}
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=}};
}
},
{ "role2",()=>{
return new KeyValueObj() { Key = " id=@id", Value = new { id = } };
}
},
};
/// <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 + "\r\n"); };
return db;
}
}
}
}
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; }
}
}
}
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 = ;//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;
}
}
}
}