c#下获取当前文件夹下指定后缀文件信息（三）

1.获取指定文件夹下的指定后缀的文件信息

using Microsoft.IdentityModel.Protocols;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Async
{
    public class Program
    {

        public static void Main(string[] args)
        {
            #region 获取指定文件夹下的指定后缀文件
            string strPaths = ConfigurationManager.AppSettings["dirPath"];
            List<FileInfo> lstfiles = GetFile(strPaths, ".jpg");
            DirectoryInfo info = new DirectoryInfo(strPaths);
            foreach (var item in lstfiles)
            {
                var index = lstfiles.IndexOf(item);
                Console.WriteLine($"循环第{index}次  -  取到对应的文件信息：{item}");
            }
             
            Console.ReadKey();
            #endregion
        }

        #region 获取指定文件夹下的指定后缀文件

        /// <summary>
        /// 获取文件夹下的莫个后缀的所有文件
        /// </summary>
        /// <param name="path">文件路劲</param>
        /// <param name="ExtName">文件后缀</param>
        /// <returns></returns>
        public static List<FileInfo> GetFile(string path, string ExtName)
        {

            try
            {
                List<FileInfo> lst = new List<FileInfo>();
                string[] dir = Directory.GetDirectories(path);// 文件夹列表
                DirectoryInfo directoryInfo = new DirectoryInfo(path);
                FileInfo[] files = directoryInfo.GetFiles();
                if (files.Length != 0 || dir.Length != 0) // 当前目录文件或文件夹不能为空
                {
                    foreach (FileInfo f in files)
                    {
                        if (ExtName.ToLower().IndexOf(f.Extension.ToLower()) >= 0)
                        {
                            lst.Add(f);
                        }
                    }
                    foreach (string d in dir)
                    {
                        GetFile(d, ExtName);
                    }
                }
                return lst;
            }
            catch (Exception ex)
            {

                throw ex;

            }
        }
        #endregion

    }
}

2.获取指定文件夹下的指定后缀的文件信息（包括子文件）

using Microsoft.IdentityModel.Protocols;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Async
{
    public class Program
    {

        public static void Main(string[] args)
        {
            #region 获取指定文件夹下的指定后缀文件
            string strPaths = ConfigurationManager.AppSettings["dirPath"];
            List<FileInfo> lst = new List<FileInfo>();
            List<FileInfo> lstfiles = GetFiles(strPaths, ".jpg", ref lst);
            DirectoryInfo info = new DirectoryInfo(strPaths);
            foreach (var item in lstfiles)
            {
                var index = lstfiles.IndexOf(item);
                Console.WriteLine($"循环第{index}次  -  取到对应的文件信息：{item}");
            }
             
            Console.ReadKey();
            #endregion
        }

        #region 获取指定文件夹下的指定后缀文件后缀（包括获取子文件下的）

        /// <summary>
        /// 获取指定文件夹下的指定后缀文件后缀（包括获取子文件下的）
        /// </summary>
        /// <param name="path">文件夹路径</param>
        /// <param name="ExtName">文件后缀</param>
        /// <param name="lst"></param>
        /// <returns></returns>
        public static List<FileInfo> GetFiles(string path, string ExtName, ref List<FileInfo> lst)
        {

            try
            {
                //List<FileInfo> lst = new List<FileInfo>();
                string[] dir = Directory.GetDirectories(path);// 文件夹列表
                DirectoryInfo directoryInfo = new DirectoryInfo(path);
                FileInfo[] files = directoryInfo.GetFiles();
                if (files.Length != 0 || dir.Length != 0) // 当前目录文件或文件夹不能为空
                {
                    foreach (FileInfo f in files)
                    {
                        if (ExtName.ToLower().IndexOf(f.Extension.ToLower()) >= 0)
                        {
                            lst.Add(f);
                        }
                    }
                    foreach (string d in dir)
                    {
                        GetFiles(d, ExtName, ref lst);
                    }
                }
                return lst;
            }
            catch (Exception ex)
            {

                throw ex;
            }
        }
        #endregion

    }
}

3.将获取到的文件复制到另外的文件夹中

using Microsoft.IdentityModel.Protocols;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Async
{
    public class Program
    {

        public static void Main(string[] args)
        {
            #region 获取指定文件夹下的指定后缀文件
            string strPaths = ConfigurationManager.AppSettings["dirPath"];
            string fidir = ConfigurationManager.AppSettings["Img"];
            List<FileInfo> lstfiles = GetFile(strPaths, ".jpg");
            DirectoryInfo info = new DirectoryInfo(strPaths);
            foreach (var item in lstfiles)
            {
                try
                {
                    string fileName = item.Name;
                    string despath = fidir + fileName;
                    File.Copy(strPaths + item.ToString(), despath);
                    Console.WriteLine(item);
                }
                catch (Exception)
                {

                    throw;
                }
            }
            Console.WriteLine("复制完成！！"); 
            Console.ReadKey();
            #endregion
        }

        #region 获取指定文件夹下的指定后缀文件

        /// <summary>
        /// 获取文件夹下的莫个后缀的所有文件
        /// </summary>
        /// <param name="path">文件路劲</param>
        /// <param name="ExtName">文件后缀</param>
        /// <returns></returns>
        public static List<FileInfo> GetFile(string path, string ExtName)
        {

            try
            {
                List<FileInfo> lst = new List<FileInfo>();
                string[] dir = Directory.GetDirectories(path);// 文件夹列表
                DirectoryInfo directoryInfo = new DirectoryInfo(path);
                FileInfo[] files = directoryInfo.GetFiles();
                if (files.Length != 0 || dir.Length != 0) // 当前目录文件或文件夹不能为空
                {
                    foreach (FileInfo f in files)
                    {
                        if (ExtName.ToLower().IndexOf(f.Extension.ToLower()) >= 0)
                        {
                            lst.Add(f);
                        }
                    }
                    foreach (string d in dir)
                    {
                        GetFile(d, ExtName);
                    }
                }
                return lst;
            }
            catch (Exception ex)
            {

                throw ex;

            }
        }
        #endregion

    }
}

4.App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
    </startup>
  <appSettings>
    <add key="dirPath" value="E:\1\"/>
    <add key="Img" value="D:\Img\"/>
  </appSettings>
</configuration>