var connstr = "Data Source=127.0.0.1;Port=3306;User ID=root;Password=root;" + "Initial Catalog=cccddd;Charset=utf8;SslMode=none;Max pool size=10"; IFreeSql fsql = new FreeSql.FreeSqlBuilder() .UseConnectionString(FreeSql.DataType.MySql, connstr) .UseAutoSyncStructure(true) //自动同步实体结构到数据库 .Build(); [Table(Name = "tb_topic")] class Topic { [Column(IsIdentity = true, IsPrimary = true)] public int Id { get; set; } public int Clicks { get; set; } public string Title { get; set; } public DateTime CreateTime { get; set; } }
fsql.Update<Topic>(1).Set(a => a.CreateTime, DateTime.Now).ExecuteAffrows(); //UPDATE `tb_topic` SET `CreateTime` = '2018-12-08 00:04:59' WHERE (`Id` = 1)
支持 Set() 屡次,至关于拼接html
fsql.Update<Topic>(1).Set(a => a.Clicks + 1).ExecuteAffrows(); //UPDATE `tb_topic` SET `Clicks` = ifnull(`Clicks`,0) + 1 WHERE (`Id` = 1)
fsql.Update<Topic>(1).Set(a => new Topic { Clicks = a.Clicks + 1, Time = DateTime.Now }).ExecuteAffrows(); //UPDATE `tb_topic` SET `Clicks` = `Clicks` + 1, Time = now() WHERE (`Id` = 1)
update.SetRaw("Title = @title", new { title = "新标题" }).Where("Id = @id", 1).ExecuteAffrows(); //UPDATE `tb_topic` SET Title = @title WHERE (Id = @id)
方法 | 返回值 | 参数 | 描述 |
---|---|---|---|
SetSource | <this> | T1 | IEnumerable
|
更新数据,设置更新的实体 |
Set | <this> | Lambda, value | 设置列的新值,Set(a => a.Name, "newvalue") |
Set | <this> | Lambda | 设置列的的新值为基础上增长,Set(a => a.Clicks + 1),至关于 clicks=clicks+1; |
SetRaw | <this> | string, parms | 设置值,自定义SQL语法,SetRaw("title = ?title", new { title = "newtitle" }) |
Where | <this> | Lambda | 表达式条件,仅支持实体基础成员(不包含导航对象) |
Where | <this> | string, parms | 原生sql语法条件,Where("id = ?id", new { id = 1 }) |
Where | <this> | T1 | IEnumerable
|
传入实体或集合,将其主键做为条件 |
WhereExists | <this> | ISelect | 子查询是否存在 |
WithTransaction | <this> | DbTransaction | 设置事务对象 |
ToSql | string | 返回即将执行的SQL语句 | |
ExecuteAffrows | long | 执行SQL语句,返回影响的行数 | |
ExecuteUpdated | List<T1> | 执行SQL语句,返回更新后的记录 |