How to move the oldest 10 files in a directory to another directory

Question

I have a C# script that is currently moving files between two directories. It moves 10 files at a time. The problem is that it is grabbing the 10 files by file name. I want it to grab the oldest 10 files each time it runs. How can I do that?

Currently, my script looks like this:

string[] dirsSourceDirectory = System.IO.Directory.GetDirectories(sourceDirectory);
string[] filesSourceDirectory = System.IO.Directory.GetFiles(sourceDirectory);
string[] dirsDestinationDirectory = System.IO.Directory.GetDirectories(destinationDirectory);
string[] filesDestinationDirectory = System.IO.Directory.GetFiles(destinationDirectory);
int filecount = Directory.GetFiles(destinationDirectory, "*.TRN", SearchOption.TopDirectoryOnly).Length;

for (int i = 1; i <= 10; i++)
    {
       FileInfo[] rgfiles = di.GetFiles();
       rgfiles[0].MoveTo(System.IO.Path.Combine(destinationDirectory, rgfiles[0].Name));
    }

Thanks!

Answer 1

var filesToMove = di
  .GetFiles()
  .OrderBy(f => f.CreationTime)
  .Take(10)
  .ToArray();

foreach (var rgFile in filesToMove)
{
   rgfile.MoveTo(System.IO.Path.Combine(destinationDirectory, rgfile.Name));
}

Answer 2

Use LINQ to get the array of files, ordered from oldest to newest, like this:

var fileInfoArray = di.GetFiles().OrderBy(fi => fi.CreationTime).Take(10).ToArray();

Then you can loop through the files:

foreach(var file in fileInfoArray)
{
     file.MoveTo(System.IO.Path.Combine(destinationDirectory, file.Name));
}

Answer 3

您可以简单地使用CreationTime函数： http : //msdn.microsoft.com/zh-cn/library/system.io.file.getcreationtime.aspx

Answer 4

尝试一些linq

List<string> slist = Directory.GetFiles(@"c:\temp").OrderBy(fn => File.GetCreationTime(fn)).ToList();