C#实现对指定文件夹中文件按修改时间排序

string path = "~/Document/Introduction/团队管理制度/";

            DirectoryInfo dirinfo = new DirectoryInfo(Server.MapPath(path));

            FileInfo[] Files = dirinfo.GetFiles();

            Array.Sort<FileInfo>(Files, new FIleLastTimeComparer());

//在页面上显示最近更新的两个文件的下载链接

            for (int i = 0; i < 2; i++)

            {

                Literal literal = new Literal();

                literal.Text = "</br>";

                Panel1.Controls.Add(literal);//实现换行显示

                HyperLink hypelink = new HyperLink();

                hypelink.NavigateUrl = path + Files[i].Name;

                hypelink.Text = Files[i].Name;

                Panel1.Controls.Add(hypelink);

           }

public class FIleLastTimeComparer : IComparer<FileInfo>

    {

        public int Compare(FileInfo x, FileInfo y)

        {

            return y.LastWriteTime.CompareTo(x.LastWriteTime);//递减

          //return x.LastWriteTime.CompareTo(y.LastWriteTime);//递增

        }

    }

using System.IO;

private void button1_Click(object sender, EventArgs e)
{
//DirectoryInfo[] list = new DirectoryInfo(path).GetDirectories();// path：文件夹路径
DirectoryInfo[] list = new DirectoryInfo(@"D:\软件").GetDirectories();
Array.Sort<DirectoryInfo>(list, new DirectoryLastTimeComparer());

textBox1.Text = list[list.Length - 1].FullName;//文件夹的全路径以及名字
textBox1.Text = list[list.Length - 1].Name; //文件夹的名字
}

private void button2_Click(object sender, EventArgs e)
{
FileInfo[] list = new DirectoryInfo(@"D:\软件").GetFiles();
Array.Sort<FileInfo>(list, new FIleLastTimeComparer());

textBox1.Text = list[list.Length - 1].FullName;//文件的全路径以及名字
textBox1.Text = list[list.Length - 1].Name; //文件的名字

}

}

//文件夹中按时间排序最新的文件读取
public class DirectoryLastTimeComparer : IComparer<DirectoryInfo>
{
#region IComparer<DirectoryInfo> 成员

public int Compare(DirectoryInfo x, DirectoryInfo y)
{
return x.LastWriteTime.CompareTo(y.LastWriteTime);

//依名称排序
//return x.FullName.CompareTo(y.FullName);//递增
//return y.FullName.CompareTo(x.FullName);//递减

//依修改日期排序
//return x.LastWriteTime.CompareTo(y.LastWriteTime);//递增
//return y.LastWriteTime.CompareTo(x.LastWriteTime);//递减

}

#endregion
}

//文件夹中按时间排序最新的文件读取
public class FIleLastTimeComparer : IComparer<FileInfo>
{
#region IComparer<FileInfo> 成员

public int Compare(FileInfo x, FileInfo y)
{
return x.LastWriteTime.CompareTo(y.LastWriteTime);
}

#endregion
}
就可以使用Array.Sort()方法来对其进行调用。当然，你也可以按创建时间来进行排序。