Question

C# 怎么在一个文件夹中查到日期最新的文件

Answer 1

用linq最简单

using System.IO;
using System.Linq;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
DirectoryInfo info = new DirectoryInfo(@"C:\");
FileInfo newestFile = info.GetFiles().OrderBy(n => n.LastWriteTime).First();
}
}
}

不用linq
using System.IO;
using System.Linq;
using System;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
DirectoryInfo info = new DirectoryInfo(@"C:\");
FileInfo[] files = info.GetFiles();
DateTime time = new DateTime(1900, 1, 1);
FileInfo newestFile = null;
foreach (FileInfo f in files)
{
if (f.LastWriteTime > time)
{
time = f.LastWriteTime;
newestFile = f;
}
}
}
}
}