C# 如何使用Linq to Sql指定DateTimeOffset精度

我有一个VS2010项目，其中包含从SQL 2008数据库生成的Linq到SQL类。相关表有一个专门创建的列，该列的类型为datetimeoffset（3），每天用作分区键：

CREATE TABLE [dbo].[tableA](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [Created] [datetimeoffset](3) NOT NULL,
    [A] [int] NULL,
 CONSTRAINT [PK_TableA] PRIMARY KEY CLUSTERED 
(
    [Created] ASC,
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) on partScheme_Daily_OnCreatedDate (Created)
) on partScheme_Daily_OnCreatedDate (Created)

为此列生成的linq to SQL代码将DateTimeOffset显示为其类型

[global::System.Data.Linq.Mapping.TableAttribute(Name="dbo.TableA")]
public partial class TableA : INotifyPropertyChanging, INotifyPropertyChanged {
    private static PropertyChangingEventArgs emptyChangingEventArgs = new PropertyChangingEventArgs(String.Empty);
    private int _Id;
    private System.DateTimeOffset _Created;

    etc

我可以基于生成的类创建并执行linq到sql查询

var query = db.TableA.Where(pt => pt.Created >= (DateTimeOffset) startTime && pt.Created <= endTime

var query=db.TableA.Where（pt=>pt.Created>=（DateTimeOffset）startTime&&pt.Created根据需要使用格式

DateTimeOffset outputDate = new DateTimeOffset(2007, 11, 1, 9, 0, 0, 
                                 new TimeSpan(-7, 0, 0)); 
string format = "dddd, MMM dd yyyy HH:mm:ss zzz";

// Output date and time using custom format specification
Console.WriteLine(outputDate.ToString(format, null as DateTimeFormatInfo));
Console.WriteLine(outputDate.ToString(format, CultureInfo.InvariantCulture));
Console.WriteLine(outputDate.ToString(format, 
                                  new CultureInfo("fr-FR")));
Console.WriteLine(outputDate.ToString(format, 
                                  new CultureInfo("es-ES")));
// The example displays the following output to the console: 
//    Thursday, Nov 01 2007 09:00:00 -07:00 
//    Thursday, Nov 01 2007 09:00:00 -07:00 
//    jeudi, nov. 01 2007 09:00:00 -07:00 
//    jueves, nov 01 2007 09:00:00 -07:00

.Net使用7的刻度，您想使用3…折衷…忽略这个问题，看看他们的解决方案…感谢您的回答，我知道如何消除dotnet精度。但我希望看到的是linq到sql将dotnet DateTimeOffset转换为sql DateTimeOffset（3）而不是DateTimeOffset（7）的方法@Ako你有DBML文件吗？这有点过分了，但是你有没有考虑过创建自定义类型映射？谢谢Paul，我会检查一下。DBML中的类型是straigt forward：
DateTimeOffset outputDate = new DateTimeOffset(2007, 11, 1, 9, 0, 0, 
                                 new TimeSpan(-7, 0, 0)); 
string format = "dddd, MMM dd yyyy HH:mm:ss zzz";

// Output date and time using custom format specification
Console.WriteLine(outputDate.ToString(format, null as DateTimeFormatInfo));
Console.WriteLine(outputDate.ToString(format, CultureInfo.InvariantCulture));
Console.WriteLine(outputDate.ToString(format, 
                                  new CultureInfo("fr-FR")));
Console.WriteLine(outputDate.ToString(format, 
                                  new CultureInfo("es-ES")));
// The example displays the following output to the console: 
//    Thursday, Nov 01 2007 09:00:00 -07:00 
//    Thursday, Nov 01 2007 09:00:00 -07:00 
//    jeudi, nov. 01 2007 09:00:00 -07:00 
//    jueves, nov 01 2007 09:00:00 -07:00