C# list file in directory issue

Question

Hello everyone,

I am using VSTS 2008 + C# + .Net 3.0. I want to enumerate all files in a directory by creation time, i.e. files created more recently will be enumarate at first, files created for a long time (older) will be enumerated at last. Any ideas how to implment this?

thanks in advance, George

Answer 1

I would probably use LINQ and a list... something like this should work:

 DirectoryInfo di = new DirectoryInfo("YourPath");
 List<FileInfo> files = di.GetFiles().OrderBy(f => f.CreationTime).ToList();

 foreach (FileInfo file in files)
        {
            //do something
        }

Answer 2

Something like that

System.IO.FileInfo[] array = new System.IO.DirectoryInfo("directory_path").GetFiles();
Array.Sort(array, delegate(System.IO.FileInfo f1, System.IO.FileInfo f2)
            {
                return f2.CreationTimeUtc.CompareTo(f1.CreationTimeUtc);
            });

Answer 3

Try somithing like this:

DirectoryInfo di = new DirectoryInfo("path to folder");
FileInfo[] files = di.GetFiles();
IOrderedEnumerable<FileInfo> enumerable = files.OrderBy(f => f.CreationTime);

foreach (FileInfo info in enumerable)
{
  // do stuff...     
}

Answer 4

DirectoryInfo baseFolder=new DirectoryInfo("folderName");
FileInfo[] files=baseFolder.GetFiles("");
for(int i=1; i<=files.Length;i++)
for(int j=1; j<files.Length;j++)
{
    if(files[j].CreationTime > files[j+1].CreationTime)
    {
     FileInfo f = files[j];
     files[j] = files[j+1];
     files[j+1] = f;
    }
}

Answer 5

EDIT: updated, here's a non-LINQ solution

FileInfo[] files = new DirectoryInfo("directory").GetFiles();
Array.Sort(files, delegate(FileInfo f1, FileInfo f2) {
    return f2.CreationTime.CompareTo(f1.CreationTime);
});

The above will sort by latest to oldest. To sort by oldest to latest change the delegate to: return f1.CreationTime.CompareTo(f2.CreationTime);

---

LINQ solution:

FileInfo[] files = new DirectoryInfo("directory").GetFiles();
var results = files.OrderByDescending(file => file.CreationTime);

Use OrderByDescending to sort by most recent CreationTime, otherwise use OrderBy to sort from oldest to newest CreationTime.