C# 删除指定路径下7天之前的文件夹

using System;
using System.IO;
using System.Linq;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            DeleteFolder(@"D:\视频检查照片\", 4);
            Console.WriteLine("删除成功");
        }

        /// <summary>
        /// 删除指定日期前文件夹
        /// 文件夹以日期命名或带有日期（要自己判断日期）
        /// </summary>
        /// <param name="path">文件夹路径</param>
        /// <param name="time">指定时间</param>
        public static void DeleteFolder(string path, int time)
        {
            DirectoryInfo dir = new DirectoryInfo(path);
            if (dir.Exists)
            {
                DirectoryInfo[] childs = dir.GetDirectories();
                foreach (DirectoryInfo child in childs)
                {
                    //文件夹名转为时间格式
                    DateTime dt2 = DateTime.Parse(child.Name);
                    //时间差
                    TimeSpan ts = DateTime.Now - dt2;
                    if (ts.Days >= time)
                        child.Delete(true);
                }
            }
        }
    }
}

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/397527865826187.png '批注 2021-08-10 121130.png')

// 指定时间字符串格式
DateTime dt2= DateTime.ParseExact(child.Name, "yyyyMMdd", System.Globalization.CultureInfo.CurrentCulture);