首先使用代码在Entity Framework Timestamp中查找更新的条目 [英] Finding updated entry with Entity Framework Timestamp using code first

问题描述

我的一个模型，我们称其为"Comment"，其中有一个时间戳列/成员

One of my models, let's call it "Comment" has a timestamp column/member

我最初将其定义为:

[Required]
public DateTime Timestamp { get; set; }

我在代码的其他部分中有一些方法可以在特定时间后获取最新注释，因此它将捕获所有时间戳大于某个值的注释.

I had some methods in other parts of my code that would get the latest comments after a specific time, so it would grab all comments with a timestamp greater than some value.

我最近遇到了朱莉·勒曼(Julie Lerman)的一篇有关实体框架的时间戳数据注释的文章(

I recently came across an article by Julie Lerman about the timestamp data annotation for entity framework (http://msdn.microsoft.com/en-US/data/jj591583#c_8b121aeb433a4ab19d538bc8c20a58fb) and she suggested using a byte array with the [Timestamp] data annotation for correct storage in the database.

[Timestamp]
public Byte[] Timestamp { get; set; }

我不确定如何处理字节数组查找更新的记录.据我了解，系统通过在每次更新时将时间戳字节数组增加1来处理时间戳字节数组，但这是一个相对值.

I am not sure how to handle finding updated records with the byte array. From what I understand, the system handles timestamp byte arrays by just incrementing them by 1 every time they are updated, but that is a relative value.

我想念什么?

推荐答案

听起来像您不是将 Timestamp 属性用作并发检查，而是将其用作标准属性.我将恢复为 DateTime

Sounds like you're not using the Timestamp property as a concurrency check but as a standard property. I'd revert back to a DateTime

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