在.NET 中按创建日期获取文件

我有一个包含许多文件的文件夹。有什么简单的方法可以按创建日期/时间排序目录中的文件名吗？

如果我使用 Directory.GetFiles()，它将返回按文件名排序的文件。

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You can use Linq

var files = Directory.GetFiles(@"C:\", "*").OrderByDescending(d => new FileInfo(d).CreationTime);
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最佳答案

this could work for you.

using System.Linq;


DirectoryInfo info = new DirectoryInfo("PATH_TO_DIRECTORY_HERE");
FileInfo[] files = info.GetFiles().OrderBy(p => p.CreationTime).ToArray();
foreach (FileInfo file in files)
{
// DO Something...
}
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This returns the last modified date and its age.

DateTime.Now.Subtract(System.IO.File.GetLastWriteTime(FilePathwithName).Date)
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If you don't want to use LINQ

// Get the files
DirectoryInfo info = new DirectoryInfo("path/to/files"));
FileInfo[] files = info.GetFiles();


// Sort by creation-time descending
Array.Sort(files, delegate(FileInfo f1, FileInfo f2)
{
return f2.CreationTime.CompareTo(f1.CreationTime);
});
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@jing: "The DirectoryInfo solution is much faster then this (especially for network path)"

I cant confirm this. It seems as if Directory.GetFiles triggers a filesystem or network cache. The first request takes a while, but the following requests are much faster, even if new files were added. In my test I did a Directory.getfiles and a info.GetFiles with the same patterns and both run equally

GetFiles  done 437834 in00:00:20.4812480
process files  done 437834 in00:00:00.9300573
GetFiles by Dirinfo(2)  done 437834 in00:00:20.7412646
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            DirectoryInfo dirinfo = new DirectoryInfo(strMainPath);
String[] exts = new string[] { "*.jpeg", "*.jpg", "*.gif", "*.tiff", "*.bmp","*.png", "*.JPEG", "*.JPG", "*.GIF", "*.TIFF", "*.BMP","*.PNG" };
ArrayList files = new ArrayList();
foreach (string ext in exts)
files.AddRange(dirinfo.GetFiles(ext).OrderBy(x => x.CreationTime).ToArray());
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If the performance is an issue, you can use this command in MS_DOS: 

dir /OD >d:\dir.txt

This command generate a dir.txt file in **d:** root the have all files sorted by date. And then read the file from your code. Also, you add other filters by * and ?.


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