C#:从特定日期获取所有文件并将其保存到文件夹 [英] C#: Get All Files From a Specific Date and Save It To a Folder
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问题描述
是否可以获取所有文件(在特定日期最后一次修改)并将其保存到新文件夹(具有特定日期的名称)中.
Is there a way to get all the files (last modified on a specific date), and save them into a new folder (with the name of the specific date).
示例文件:
在C里面:/
Image File Date Modified
Image001.jpg 11/12/2012
Image002.jpg 11/12/2012
Image003.jpg 11/13/2012
Image004.jpg 11/12/2012
输出应为:
C:/20121112/
Image001.jpg
Image002.jpg
Image004.jpg
C:/20121113
Image003.jpg
我当前正在使用以下语法:
I am currently using the syntax below:
var mydirectory = new DirectoryInfo("C:/");
DateTime from_date = DateTime.Now.AddDays(-1);
DateTime to_date = DateTime.Now;
var files = directory.GetFiles()
.Where(file=>file.LastWriteTime >= from_date && file.LastWriteTime <= to_date);
但是我不知道如何将var文件保存到另一个文件夹名称.
But I don't how save to save var files to another folder name.
推荐答案
也许:
var files = Directory.EnumerateFiles(path, "*.jpg", SearchOption.TopDirectoryOnly)
.Select(fn => new FileInfo(fn));
var fileDateGroups = files.GroupBy(fi => fi.LastWriteTime.Date);
foreach (var dateGroup in fileDateGroups)
{
string dir = Path.Combine(@"C:\", dateGroup.Key.ToString("yyyyMMdd"));
Directory.CreateDirectory(dir);
foreach (var file in dateGroup)
{
string newPath = Path.Combine(dir, file.Name);
File.Copy(file.FullName, newPath, true);
}
}
编辑:如果要搜索多个文件扩展名,则需要手动对其进行过滤:
Edit: If you want to search for multiple file extensions you need to filter them manually:
var allowed = new[]{ ".png", ".jpg" };
var files = Directory.EnumerateFiles(path, "*.*", SearchOption.TopDirectoryOnly)
.Where(fn => allowed.Contains(Path.GetExtension(fn)))
.Select(fn => new FileInfo(fn));
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