如何正确重写的SaveChanges功能EF 4.1 [英] How to correctly override the SaveChanges function in EF 4.1
问题描述
我需要的时候我在EF 4.1 MVC3 Web应用程序创建新订单自动插入当前日期。我还需要自动添加当前登录的用户 - 我使用窗体身份验证。
在网上搜索后,我发现我需要覆盖的SaveChanges()函数,并在计算器上的一篇文章介绍了如何做到这一点:的实体框架4.1自动日期。但是,我不能得到code工作。
哪里该code去了?
我如何找出是什么?
I need to automatically insert the current date when I create a new order in my EF 4.1 MVC3 web application. I also need to automatically add the currently logged in user - I'm using forms authentication. After searching the web, I found that I need to override the SaveChanges() function and an article on StackOverflow showed how to do this: Entity Framework 4.1 Automatic date. However, I couldn't get the code to work. Where does this code go? How do I find out what is?
很抱歉,如果问题是微不足道的 - 我是新来的EF。
B点。
Sorry if the question is trivial - I'm new to EF. B.
推荐答案
您可以在上下文类重写,
You can override in your context class,
public partial class YourDbContext: DbContext
{
public YourDbContext()
{
}
public override int SaveChanges()
{
// do your additional stuff here.. (Ex:- save current user)
return base.SaveChanges();
}
}
而另一种选择是你可以在你的实体的构造,
And the other option is you can set default values in the constructor of your entity,
Public class YourEntity{
public YourEntity(){
CreatedDate=DateTime.Now;
}
Public DateTime CreatedDate{get;set;}
}
这篇关于如何正确重写的SaveChanges功能EF 4.1的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!