根据日期过滤文件夹文件

Question

DirectoryInfo info = new DirectoryInfo(Directory Name);
//... Other code 
var allLines = info.GetFiles("*.dat")
                          .Where(p => p.CreationTime.Date ==DateTime.Today.Date)
                           .SelectMany(p => File.ReadAllLines(p.FullName));

I am trying to fetch files which have been created today . But with this code I am get all the .dat files present in the folder which are over 3 months old. Any help!! Newbie in C#

Answer 1

Try this

What I understood from the linq you provided is you want the files of type .dat whose creation date is today and do write operation.

   var allLines = info.GetFiles("*.dat")
                      .Where(p => p.CreationTime.Date > DateTime.Today.Date.AddMinutes(-1))
                       .SelectMany(p => File.ReadAllLines(p.FullName));

Answer 2

Looks like your:

.SelectMany(p => File.ReadAllLines(p.FullName));

is wrong.

Why you are not using just:

info.GetFiles("*.dat").Where(p => p.CreationTime.Date == DateTime.Today.Date).Select(p => p.FullName);

And you will get list of files

Answer 3

The code is working fine . Only thing was, I had to delete the previous compiled/debug file which did not involve date filtering . It was therefore taking the same even though clean solution & rebuild solution was done .