C# 使用 .NET 删除目录中超过 3 个月的文件
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Delete files older than 3 months old in a directory using .NET
提问by JL.
I would like to know (using C#) how I can delete files in a certain directory older than 3 months, but I guess the date period could be flexible.
我想知道（使用 C#）如何删除某个目录中超过 3 个月的文件，但我想日期期限可能是灵活的。
Just to be clear: I am looking for files that are older than 90 days, in other words files created less than 90 days ago should be kept, all others deleted.
需要明确的是：我正在寻找超过 90 天的文件，换句话说，应该保留少于 90 天前创建的文件，删除所有其他文件。
采纳答案by Steve Danner
Something like this outta do it.
像这样的事情不能做。
using System.IO;
string[] files = Directory.GetFiles(dirName);
foreach (string file in files)
{
FileInfo fi = new FileInfo(file);
if (fi.LastAccessTime < DateTime.Now.AddMonths(-3))
fi.Delete();
}
回答by Keith Bloom
The GetLastAccessTimeproperty on the System.IO.File class should help.
该GetLastAccessTime上有System.IO.File类属性应该有所帮助。
回答by Ian Jacobs
Basically you can use Directory.Getfiles(Path) to get a list of all the files. After that you loop through the list and call GetLastAccessTim() as Keith suggested.
基本上你可以使用 Directory.Getfiles(Path) 来获取所有文件的列表。之后，您遍历列表并按照 Keith 的建议调用 GetLastAccessTim()。
回答by nWorx
you just need FileInfo-> CreationTime
你只需要FileInfo-> CreationTime
and than just calculate the time difference.
而不仅仅是计算时差。
in the app.config you can save the TimeSpanvalue of how old the file must be to be deleted
在 app.config 中，您可以保存文件必须被删除的时间跨度值
also check out the DateTime Subtractmethod.
还可以查看DateTime Subtract方法。
good luck
祝你好运
回答by Pierre-Luc Champigny
Here's a snippet of how to get the creation time of files in the directory and find those which have been created 3 months ago (90 days ago to be exact):
以下是如何获取目录中文件的创建时间并查找 3 个月前（准确地说是 90 天前）创建的文件的片段：
DirectoryInfo source = new DirectoryInfo(sourceDirectoryPath);
// Get info of each file into the directory
foreach (FileInfo fi in source.GetFiles())
{
var creationTime = fi.CreationTime;
if(creationTime < (DateTime.Now- new TimeSpan(90, 0, 0, 0)))
{
fi.Delete();
}
}
回答by jinsungy
Alternatively, you can use the File.GetCreationTime Methodif you need to delete files based on creation dates.
或者，如果您需要根据创建日期删除文件，您可以使用File.GetCreationTime 方法。
回答by Samuel Neff
For those that like to over-use LINQ.
对于那些喜欢过度使用 LINQ 的人。
(from f in new DirectoryInfo("C:/Temp").GetFiles()
where f.CreationTime < DateTime.Now.Subtract(TimeSpan.FromDays(90))
select f
).ToList()
.ForEach(f => f.Delete());
回答by Uri Abramson
Here's a 1-liner lambda:
这是一个单行 lambda：
Directory.GetFiles(dirName)
.Select(f => new FileInfo(f))
.Where(f => f.LastAccessTime < DateTime.Now.AddMonths(-3))
.ToList()
.ForEach(f => f.Delete());
回答by Yiannis Leoussis
Something like that
类似的东西
foreach (FileInfo file in new DirectoryInfo("SomeFolder").GetFiles().Where(p => p.CreationTime < DateTime.Now.AddDays(-90)).ToArray())
File.Delete(file.FullName);
回答by vishal
system.IO;
List<string> DeletePath = new List<string>();
DirectoryInfo info = new DirectoryInfo(Server.MapPath("~\TempVideos"));
FileInfo[] files = info.GetFiles().OrderBy(p => p.CreationTime).ToArray();
foreach (FileInfo file in files)
{
DateTime CreationTime = file.CreationTime;
double days = (DateTime.Now - CreationTime).TotalDays;
if (days > 7)
{
string delFullPath = file.DirectoryName + "\" + file.Name;
DeletePath.Add(delFullPath);
}
}
foreach (var f in DeletePath)
{
if (File.Exists(F))
{
File.Delete(F);
}
}
use in page load or webservice or any other use.
用于页面加载或网络服务或任何其他用途。
My concept is evrry 7 day i have to delete folder file without using DB
我的概念是 evrry 7 天我必须在不使用 DB 的情况下删除文件夹文件
