LINQ to Entities使用日期字段查询,截取日期,不包括时间,测试环境SQL Server2005/2008,Entity Framework4.0
public void TestMethod1()
{
using (var _context = new hotelEntities())
{
var rq = DateTime.Now.Date;
var query = from q in _context.UV_RZJL_RZRY_Single
where EntityFunctions.TruncateTime(q.LDRQ) >=rq
select q;
Assert.Inconclusive(query.Count().ToString());
}
}
//SqlFunctions.DateDiff的函数也可以实现
public void TestMethod1()
{
using (var _context = new hotelEntities())
{
var rq = DateTime.Now.Date;
var query = from q in _context.UV_RZJL_RZRY_Single
where SqlFunctions.DateDiff("day",rq,q.LDRQ)>0
select q;
Assert.Inconclusive(query.Count().ToString());
}
}
筛选本周数据
//获取当天的数据
DrawRecordDA _recordDA = new DrawRecordDA();
var query = _recordDA.GetQuery();
//筛选 当天
//query = query.Where(q=>SqlFunctions.DateDiff("day",q.AddTime,DateTime.Now)==0);
//筛选 当天
// query = query.Where(q=>q.AddTime.Day==DateTime.Now.Day);
//筛选 本周
query = query.Where(q => SqlFunctions.DateDiff("week", q.AddTime, DateTime.Now) == 0);
Console.WriteLine(query.Count());
特别说明:
SqlFunctions的命名空间使用:
using System.Data.Entity.SqlServer;
而不是使用:
using System.Data.Objects.SqlClient;