我是从SQL Server 2008 R2 Express生成的ADO.NET实体数据模型,在我的表中我有时间或日期时间值。在datagrid中,此字段以毫秒正确显示,但在LINQ查询中使用我的ObjectSet<>我失去了几毫秒。为什么呢?
var query = from data in ctx.Data
join member in ctx.Members
on data.MemberId equals member.MemberId
where member.StepId == (int)RepStepCombo.SelectedValue
orderby data.Time ascending
select new {
data.LaneNum,
member.MemberName,
data.Time,
mill = data.Time.Millisecond
};
StreamWriter sw = new StreamWriter("text.txt");
foreach (var data in query)
{
sw.WriteLine(data.LaneNum + " " +
data.MemberName + " " + " millisec: " +
data.Time.ToString("HH:mm:ss.fff") + " " +
data.mill);
}
sw.Close();
sw.Dispose();
答案 0 :(得分:2)
你确定Time是DateTime而不是SmallDateTime吗? SmallDateTime具有较小的分辨率,并且不精确。
使用Sql2008和EF从datetime字段获取毫秒没有问题:
var members = from s in myEntites.TableName
select s;
foreach (TableEntry entry in members)
{
String time = ((DateTime)entry.date).ToString("HH:mm:ss.fff");
Console.WriteLine(time);
}
时间,转换为TimeSpan:
var members = from s in myEntites.TableName
where s.myTime != null
select s;
foreach (Entity myEntity in members)
{
String time = ((TimeSpan)myEntity.myTime).Milliseconds.ToString();
}
“在我的机器上工作!” :)