Getting all files modified within a date range

Question

We have a asp.net,C# application in which there is a requirement to get all the files whose date modified will be b/w startdate and enddate . How can we achieve this ? Also want to get all the files not modified for last 3 months ?

score 60 · Accepted Answer · edited May 23 '17 at 12:25

60

According to this post, you could do this:

var directory = new DirectoryInfo(your_dir);
DateTime from_date = DateTime.Now.AddMonths(-3);
DateTime to_date = DateTime.Now;
var files = directory.GetFiles()
  .Where(file=>file.LastWriteTime >= from_date && file.LastWriteTime <= to_date);

edited May 23 '17 at 12:25

Community

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answered Aug 31 '11 at 12:25

Marco

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Also love this answer [here](http://stackoverflow.com/a/13867061/4009972) by @nicholas-carey that suggests `Directory.EnumerateFiles()` over `Directory.GetFiles()` – codeMonkey Apr 07 '17 at 17:00
Another downvote, seriously? Please downvoters, leave a note explaining the reason my post is bad so that I can eventually amend it and give the community a better answer! – Marco May 23 '18 at 10:03
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I suspect the use of "GetFiles". This is first gets a complete list of all files and then passes the complete array onto the where clause. On a file system with a large number of files this would be inefficient. Enumeratefiles passes each file onto the where clause. – Adam Green Aug 05 '18 at 16:52

score 1 · Answer 2 · edited May 23 '17 at 12:02

1

look at this question and answer:

How to find the most recent file in a directory using .NET, and without looping?

you can start from there and add your where clause to the provided LINQ query in the answer :)

edited May 23 '17 at 12:02

Community

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answered Aug 31 '11 at 12:06

Davide Piras

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Getting all files modified within a date range

2 Answers2