asp.net定义成员资格提供：IsOnline财产

问题描述

在实现自定义成员提供我看到底层数据模型ISONLINE列在user表中，如下所述：

When implementing a custom membership provider I see that the underlying data model has ISONLINE column in the USER table, as described here: http://msdn.microsoft.com/en-us/library/6tc47t75.aspx

问：当这个领域实际上是在数据库中更新？在示例实现了MSDN，不存在此列的更新和的 IsOnline 的属性计算公式为：

Question: When is this field actually updated in the database? In the sample implementation MSDN gave, there is no updating of this column, and IsOnline property is calculated as:

return (now - userIsOnlineTimeWindow > LastActivityDateTime ? false:true);

那么，是什么在user表ISONLINE专栏的目的，如果它从来没有更新？或者，我错过了什么？

So what is the purpose of ISONLINE column in the USER table if it's never updated??? Or I am missing out on something???

感谢

推荐答案

我也意识到这一点，并认为它可能永远不会实现的想​​法。

I also realised this and assumed it was an idea that was never implemented.

既然你有LastActivityDateTime，可以随时检查。

Since you have LastActivityDateTime, you can always check that.

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