如何使用c＃创建按时间顺序的文件夹？

Question

When I am saving a file to the filesystem, I need to store it in chronological order (only three level deep). Year -> Month -> Day -> then store file. (2010 -> June -> 01-06-2010 -> file1.txt. If folders are already in File System then don't create them just save the file.

Whats the best approach?

Answer 1

Probably not the best, but a quick one.. Run with c:\\temp, and get C:\\temp\\2010\\juni\\08-06-2010. Locale dependent month name btw..

    public static DirectoryInfo GetCreateMyFolder(string baseFolder)
    {
        var now = DateTime.Now;
        var yearName = now.ToString("yyyy");
        var monthName = now.ToString("MMMM");
        var dayName = now.ToString("dd-MM-yyyy");

        var folder = Path.Combine(baseFolder,
                       Path.Combine(yearName,
                         Path.Combine(monthName,
                           dayName)));

        return Directory.CreateDirectory(folder);
    }

Answer 2

DateTime d = DateTime.Now;
String s = Path.Combine(d.Year.ToString(), d.ToString("MMMM"), d.ToString("dd-MM-yyyy"), "file1.txt");
if (!Directory.Exists(s)) Directory.CreateDirectory(s);

For different date formats, this is a good resource: http://blog.stevex.net/string-formatting-in-csharp/

Obviously, you should combine this path to the main path you will be saving the files in (such as: String s2 = Path.Combine("C:\\\\Test", s); ).

Answer 3

string basePath = @"c:\temp";
var myDate = DateTime.Now;
DirectoryInfo di = Directory.CreateDirectory(Path.Combine(basePath, myDate.Year.ToString()));
di = Directory.CreateDirectory(Path.Combine(di.FullName, myDate.ToString("MMMM")));
di = Directory.CreateDirectory(Path.Combine(di.FullName, myDate.ToString("dd-MM-yyyy")));

You can also do it with one CreateDirectory call, in this fashion:

string basePath = @"c:\temp";
var myDate = DateTime.Now;
Directory.CreateDirectory(Path.Combine(Path.Combine(Path.Combine(basePath, myDate.Year.ToString()), myDate.ToString("MMMM")), myDate.ToString("dd-MM-yyyy")));

Answer 4

string StartupPath= @"C:\temp\";
string Year = DateTime.Now.Year.ToString(); 
string Month = DateTime.Now.Month.ToString(); 
string Day = DateTime.Now.Day.ToString();
Directory.CreateDirectory(StartupPath + "\\" + Year + "\\" + Month + "\\" + Day);