Dapper 链式查询 扩展

Dapper 链式查询扩展 DapperSqlMaker  

Github地址：https://github.com/mumumutou/DapperSqlMaker

Demo:

• 查询       TestsDapperSqlMaker\DapperSqlMaker.Test\ SelectDapperSqlMakerTest.cs
• 添加       TestsDapperSqlMaker\DapperSqlMaker.Test\  InsertDapperSqlMakerTest.cs
• 更新       TestsDapperSqlMaker\DapperSqlMaker.Test\  UpdateDapperSqlMakerTest.cs
• 删除       TestsDapperSqlMaker\DapperSqlMaker.Test\  DeleteDapperSqlMakerTest.cs
• 上下文类   TestsDapperSqlMaker\DbDapperSqlMaker\  LockDapperUtilsqlite.cs

简单栗子：

1.查询-联表查询,分页

 1 [Test]
 2 public void 三表联表分页测试()
 3 {
 4     LockPers lpmodel = new LockPers() { Name = "%蛋蛋%", IsDel = false};
 5     Users umodel = new Users() { UserName = "jiaojiao" };
 6     SynNote snmodel = new SynNote() { Name = "%木头%" };
 7     Expression<Func<LockPers, Users, SynNote, bool>> where = PredicateBuilder.WhereStart<LockPers, Users, SynNote>();
 8     where = where.And((lpw, uw, sn) => lpw.Name.Contains(lpmodel.Name));
 9     where = where.And((lpw, uw, sn) => lpw.IsDel == lpmodel.IsDel);
10     where = where.And((lpw, uw, sn) => uw.UserName == umodel.UserName);
11     where = where.And((lpw, uw, sn) => sn.Name.Contains(snmodel.Name));
12
13     DapperSqlMaker<LockPers, Users, SynNote> query = LockDapperUtilsqlite<LockPers, Users, SynNote>
14         .Selec()
15         .Column((lp, u, s) =>        // null) //查询所有字段
16             new { lp.Id, lp.InsertTime, lp.EditCount, lp.IsDel, u.UserName, s.Content, s.Name })
17         .FromJoin(JoinType.Left, (lpp, uu, snn) => uu.Id == lpp.UserId
18                 , JoinType.Inner, (lpp, uu, snn) => uu.Id == snn.UserId)
19         .Where(where)
20         .Order((lp, w, sn) => new { lp.EditCount, lp.Name, sn.Content });
21
22     var result = query.ExcuteSelect(); //1. 执行查询
23     WriteJson(result); //  打印查询结果
24
25     Tuple<StringBuilder, DynamicParameters> resultsqlparams = query.RawSqlParams();
26     WriteSqlParams(resultsqlparams);  // 打印生成sql和参数
27
28     int page = 2, rows = 3, records;
29     var result2 = query.LoadPagelt(page, rows, out records); //2. 分页查询
30     WriteJson(result2); //  查询结果
31 }

2.更新-更新部分字段

 1 [Test]
 2 public void 更新部分字段测试lt()
 3 {
 4     var issucs = LockDapperUtilsqlite<LockPers>.Cud.Update(
 5         s =>
 6         {
 7             s.Name = "测试bool修改1";
 8             s.Content = "update方法内赋值修改字段";
 9             s.IsDel = true;
10         },
11         w => w.Name == "测试bool修改1" && w.IsDel == true
12         );
13     Console.WriteLine(issucs);
14 }

3.七联表以上待扩展  copy六联表修改3个文件

• DapperSqlMaker
• Template_DapperSqlMaker 上下文类
• PredicateBuilder 　　          条件拼接类

4.实体生成T4模板使用方法    https://www.cnblogs.com/cl-blogs/p/7205954.html

原文地址：https://www.cnblogs.com/cl-blogs/p/10219126.html