Actually i solved the problem. It was because the idField of the table i was using was incorrect. it appears that the getSelections uses the idField property so you need to make sure that the idField is actually the same as the one passed in the json
一: 执行sql语句,返回受影响的行数 在mysql里面,如果没有影响,那么返回行数为 -1 ,sqlserver 里面 还没有测试过 using (var ctx = new MyDbContext()) { ctx.Database.ExecuteSqlCommand("UPDATE Person SET Name = 'Michael' WHERE PersonID = 1"); } 二 : Database.SqlQuery<T> EF5执行sql查询语句
rowcount的用法: rowcount的作用就是用来限定后面的sql在返回指定的行数之后便停止处理,比如下面的示例, set rowcount 10select * from 表A 这样的查询只会返回表A中的前10条数据.它和 "select top 10 * from 表A" 的作用一样.注意一点,set rowcount 的设置会在整个会话中有效.比如下面的sql示例: set rowcount 10select * from 表Agoselect * from 表B 表A和表
1.获取所有数据库名 --SELECT Name FROM Master..SysDatabases ORDER BY Name -- 2.获取所有表名: --SELECT Name NAMEtemp,* FROM TEST..SysObjects Where XType='U' ORDER BY Name --表名 ----XType='U':表示所有用户表; ----XType='S':表示所有系统表; 3.获取所有字段名: SELECT Name FROM SysColumns WHER