MyDAL - .ListAsync() 使用
索引:
一.api 列表
.listasync()
.listasync<m>()
如: .listasync<agentinventoryrecord>() , 用于 单表/多表连接 查询.
.listasync<vm>()
如: .listasync<agentvm>() , 用于 单表 查询.
.listasync<t>(expression<func<m, t>> columnmapfunc)
如: .listasync(it => it.name) , 用于 单表 单列 查询.
或者:
.listasync(agent => new agentvm
{
xxxx = agent.name,
yyyy = agent.pathid
}) , 用于 单表 多列 查询.
.listasync<t>(expression<func<t>> columnmapfunc)
如: .queryer(out agent agent1, out agentinventoryrecord record1)
... ...
.listasync(() => agent1.createdon) , 用于 多表连接 单列 查询.
或者: .queryer(out agent agent12, out agentinventoryrecord record12)
... ...
.listasync(() => new agentvm
{
nn = agent12.pathid,
yy = record12.id,
xx = agent12.id,
zz = agent12.name,
mm = record12.lockedcount
}) , 用于 多表连接 多列 查询.
二.api 单表-便捷 方法 举例
1. 单表 单列 多条 便捷方法
1 var res7 = await conn.listasync<agent, string>(it => it.name.startswith("张"), it => it.name);
生成的 sql 如下
1 select `name` 2 from `agent` 3 where `name` like @name__1;
2. 单表 多列 多条 便捷方法
1 var date = datetime.parse("2018-08-20"); 2 3 var res3 = await conn.listasync<alipaypaymentrecord, alipaypaymentrecordvm>(it => it.createdon >= date, 4 it => new alipaypaymentrecordvm 5 { 6 totalamount = it.totalamount, 7 description = it.description 8 });
生成的 sql 如下:
1 select `totalamount` as totalamount, 2 `description` as description 3 from `alipaypaymentrecord` 4 where `createdon`>=@createdon__1;
3. 单表 vm 多条 便捷方法
1 var date = datetime.parse("2018-08-20"); 2 3 var res2 = await conn.listasync<alipaypaymentrecord, alipaypaymentrecordvm>(it => it.createdon >= date);
生成 sql 如下:
1 select `id`, 2 `createdon`, 3 `totalamount`, 4 `description`, 5 `canceledon` 6 from `alipaypaymentrecord` 7 where `createdon`>=@createdon__1;
4. 单表 m 多条 便捷方法
1 var date = datetime.parse("2018-08-20"); 2 3 var res1 = await conn.listasync<alipaypaymentrecord>(it => it.createdon >= date);
生成 sql 如下:
1 select * 2 from `alipaypaymentrecord` 3 where `createdon`>=@createdon__1;
三.api 单表-完整 方法 举例
1. 单表 单列 多条 完整方法
1 var res2 = await conn 2 .queryer<agent>() 3 .where(it => it.agentlevel == agentlevel.distiagent) 4 .listasync(it => it.name);
生成 sql 如下:
1 select `name` 2 from `agent` 3 where `agentlevel`=@agentlevel__1;
2.单表 多列 多条 完整方法
1 var res5 = await conn 2 .queryer<agent>() 3 .where(it => it.agentlevel == agentlevel.distiagent) 4 .listasync(agent => new agentvm 5 { 6 xxxx = agent.name, 7 yyyy = agent.pathid 8 });
生成 sql 如下
1 select `name` as xxxx, 2 `pathid` as yyyy 3 from `agent` 4 where `agentlevel`=@agentlevel__1;
3.单表 vm 多条 完整方法
1 var testq5 = new wheretestmodel 2 { 3 createdon = datetime.now.adddays(-30), 4 starttime = wheretest.createdon, 5 endtime = datetime.now, 6 agentlevelxx = agentlevel.distiagent, 7 containstr = "~00-d-3-1-" 8 }; 9 var res5 = await conn 10 .queryer<agent>() 11 .where(it => it.createdon >= testq5.starttime) 12 .listasync<agentvm>();
生成 sql 如下
1 select `id`, 2 `createdon`, 3 `userid`, 4 `pathid`, 5 `name`, 6 `phone` 7 from `agent` 8 where `createdon`>=@createdon__1;
4. 单表 m 多条 完整方法
1 var start = wheretest.createdon.adddays(-10); 2 3 var res2 = await conn 4 .queryer<bodyfitrecord>() 5 .where(it => it.createdon >= start) 6 .listasync();
生成 sql 如下:
1 select * 2 from `bodyfitrecord` 3 where `createdon`>=@createdon__1;
四.api 多表连接-完整 方法 举例
1.多表连接 单列 多条 完整方法
1 var res1 = await conn 2 .queryer(out agent agent1, out agentinventoryrecord record1) 3 .from(() => agent1) 4 .innerjoin(() => record1) 5 .on(() => agent1.id == record1.agentid) 6 .where(() => agent1.agentlevel == agentlevel.distiagent) 7 .listasync(() => agent1.createdon);
生成 sql 如下
1 select agent1.`createdon` 2 from `agent` as agent1 3 inner join agentinventoryrecord as record1 4 on agent1.`id`=record1.`agentid` 5 where agent1.`agentlevel`=@agentlevel__4;
2.多表连接 多列 多条 完整方法
1 var res12 = await conn 2 .queryer(out agent agent12, out agentinventoryrecord record12) 3 .from(() => agent12) 4 .innerjoin(() => record12) 5 .on(() => agent12.id == record12.agentid) 6 .where(() => record12.createdon >= wheretest.createdon) 7 .listasync(() => new agentvm 8 { 9 nn = agent12.pathid, 10 yy = record12.id, 11 xx = agent12.id, 12 zz = agent12.name, 13 mm = record12.lockedcount 14 });
生成 sql 如下
1 select agent12.`pathid` as nn, 2 record12.`id` as yy, 3 agent12.`id` as xx, 4 agent12.`name` as zz, 5 record12.`lockedcount` as mm 6 from `agent` as agent12 7 inner join agentinventoryrecord as record12 8 on agent12.`id`=record12.`agentid` 9 where record12.`createdon`>=@createdon__4;
3.多表连接 m 多条 完整方法
1 var res1 = await conn 2 .queryer(out agent agent1, out agentinventoryrecord record1) 3 .from(() => agent1) 4 .innerjoin(() => record1) 5 .on(() => agent1.id == record1.agentid) 6 .where(() => agent1.createdon >= wheretest.createdon.adddays(-60)) 7 .listasync<agentinventoryrecord>();
生成 sql 如下
1 select record1.`*` 2 from `agent` as agent1 3 inner join agentinventoryrecord as record1 4 on agent1.`id`=record1.`agentid` 5 where agent1.`createdon`>=@createdon__4;
蒙
2018-12-26 15:25 周三
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