how to sort list in c#?

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hi i have belew code and i want sort it by file date desc(fileArr) how?
i don't know how to use OrderBy function in this code please modify for me.

C#

string path = Server.MapPath(".") + "\\Upload\\VideoGallery";

DirectoryInfo di = new DirectoryInfo(path);
FileInfo[] fileArr = di.GetFiles("*.flv");

thanks.

Posted 17-Jun-13 22:14pm

Behnam Mohammadi

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_Amy · Accepted Answer · 2013-06-17T22:21:00

Solution 1

You can easily do it using Linq. Try this:

C#

Array.Sort(fileArr, (f1, f2) => f1.LastWriteTime.CompareTo(f2.LastWriteTime));

Or:

C#

var sortedFiles = new DirectoryInfo(path).GetFiles()
                              .OrderBy(f => f.LastWriteTime)
                              .ToList();

--Amit

Posted 17-Jun-13 22:21pm

_Amy

Comments

CPallini 18-Jun-13 5:00am

5.

_Amy 18-Jun-13 5:05am

Thank You. :)

Behnam Mohammadi 18-Jun-13 8:47am

_Amy thank you for you'r solution but if i have
galleryCat = System.IO.Directory.GetDirectories(Server.MapPath(".") + "/Upload/ImageGallery"); how to order by date created DESC?

_Amy 19-Jun-13 0:06am

Order it by desc. Try this:

Array.Sort(fileArr, (f1, f2) => f1.LastWriteTime.CompareTo(f2.LastWriteTime));
var files = fileArr.OrderByDescending(s => s.LastWriteTime);//If you want in desc order
foreach (FileInfo f in files)
{    
    Console.WriteLine(f.Name + "\t" + f.LastWriteTime);
}

--Amit

Behnam Mohammadi 18-Jun-13 8:56am

and what is f?

_Amy 18-Jun-13 23:50pm

f1 and f2 are tow object of filearr. Refer the link for details: http://bytes.com/topic/c-sharp/answers/873536-confusion-over-how-icomparer-works[^]
--Amit

CPallini · Accepted Answer · 2013-06-17T22:23:00

Solution 2

This Stack Overflow question might interest you: "Sorting Files by date"[^] (see the top answer).

Posted 17-Jun-13 22:23pm

CPallini

Comments

Thanks7872 18-Jun-13 4:45am

Wow...Exxxxxxcellent shot...! Good one..I was also confused lil bit about the same....Clearly needs to be upvoted.

CPallini 18-Jun-13 5:00am

Thank you.

_Amy 18-Jun-13 5:06am

+5!