C#读取文件目录输出到CSV文件中

2011-11-17 01:12:53 249 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

C#关于CSV文件的读取以及数据的输出在很多实际业务中，经常会有从外部CSV文件数据导入到系统里，更新数据库，或者更新云端Entity。这个是非常简单的一个应用，具体也可以查看微软官方文档。 1. 安装Visula Studio，目前的最新版本是2019版，也可以是旧的2017版，2015版都可以。 2. 新建工程，建一个控制台.NET Framework的项目即可。 3. 插入以下代码，注释部分有些日文，大家可以无视啊。不... 阅读详情



using System;

using System.Collections.Generic;

using System.IO;

using System.Text;

using System.Data;

using Microsoft.VisualStudio.SourceSafe.Interop;





class DirectoryFileCount

{



    static long files = 0;

    static long directories = 0;





    static void Main()

    {

        try

        {

            Console.WriteLine("Enter the path to a directory:");



            string directory = Console.ReadLine();



            // Create a new DirectoryInfo object.

            DirectoryInfo dir = new DirectoryInfo("C:/123");



            if (!dir.Exists)

            {

                throw new DirectoryNotFoundException("The directory does not exist.");

            }



            // Call the GetFileSystemInfos method.

            FileSystemInfo[] infos = dir.GetFileSystemInfos();



            //Console.WriteLine("Working...");



            // Pass the result to the ListDirectoriesAndFiles

            // method defined below.

            ListDirectoriesAndFiles(infos);



            // Display the results to the console. 

            Console.WriteLine("directories: {0}", directories);

            Console.WriteLine("files: {0}", files);



        }

        catch (Exception e)

        {

            Console.WriteLine(e.Message);

        }

        finally

        {



            Console.ReadLine();

        }

    }



    static void ListDirectoriesAndFiles(FileSystemInfo[] FSInfo)

    {

        // Check the FSInfo parameter.

        if (FSInfo == null)

        {

            throw new ArgumentNullException("FSInfo");

        }





        List<string> list = new List<string>();

        // Iterate through each item.

        foreach (FileSystemInfo i in FSInfo)

        {

            // Check to see if this is a DirectoryInfo object.

            if (i is DirectoryInfo)

            {

                // Add one to the directory count.

                directories++;



                // Cast the object to a DirectoryInfo object.

                DirectoryInfo dInfo = (DirectoryInfo)i;



                // Iterate through all sub-directories.

                ListDirectoriesAndFiles(dInfo.GetFileSystemInfos());





                



                Console.WriteLine(dInfo.FullName);



                list.Add(dInfo.FullName);

              





                // 实例化一个StreamWriter 对象，创建文件

                using (StreamWriter sw = new StreamWriter(@"C:\new.txt"))

                {

                    foreach (string para in list)

                    {

                        //输出信息

                        //Console.WriteLine(para);

                        //写入信息

                        sw.WriteLine(para);

                        sw.Flush();

                    }

                }







            }

            // Check to see if this is a FileInfo object.

            else if (i is FileInfo)

            {

                // Add one to the file count.

                files++;



                FileInfo fInfo = (FileInfo)i;



                //Console.WriteLine("**************所有文件******************");





               // Console.WriteLine(fInfo.Name);







            }



        }

    }

}