比较“最后修改日期".到今天为止 [英] Comparing the "last modified date" to todays date

问题描述

问候，

我正在编写一个小型实用程序，用于比较文件夹中所有文件的上次修改时间"属性，如果它们的使用天数是X天，则将其删除.

有人能给我比我想出的更优雅的方法吗?

Greetings,

I am writing a small utility that compares the ''Last modified'' attribute on all files in a folder, and if they are X amount of days old, deletes them.

Can someone give me a more elegant way to do this than what I have come up with?

DateTime fileModDate = File.GetLastWriteTime(f);
int result = DateTime.Compare(fileModDate.AddDays(intDays), today);
if (result < 0)
{
    File.Delete(f);
}

推荐答案

不，我认为没有任何更简单的方法可以编写此代码.我将File.Delete放入try/catch并考虑检查文件是否为只读，但这会添加代码，但不会将其减去.

No, I don''t think there''s any simpler way of writing this code. I''d put the File.Delete in a try/catch and consider checking if files are read only, but that adds code, it does not subtract it.

写道:​​

intDays

只是要补充-匈牙利语表示法在匈牙利语停止为Microsoft工作后就过时了.

Just to add - Hungarian notation went out of fashion as soon as the Hungarian stopped working for Microsoft.

我可能会这样:

I''d probably do it like this:

DateTime firstValidDate = DateTime.Now.AddDays(-days);
DateTime fileModDate = File.GetLastWriteTime(f);
if (fileModDate < firstValidDate) File.Delete(f);

您可以预先计算 firstValidDate ，然后在循环(例如，对文件夹中每个文件的循环)中使用它，而无需重新进行计算.请注意，也无需使用Compare方法(您可以只使用比较运算符).

You can calculate firstValidDate in advance then use it in a loop (such as a loop over each file in a folder) without recalculating again. Note that there is also no need to use the Compare method (you can just use comparison operators).

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