2020-08-21

C#访问共享文件夹，并下载数据到本地

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DBHelperWMS
{
    public class ShareDownload
    {
        public bool connectState(string path)
        {
            return connectState(path, "", "");
        }
        /// <summary>
        /// 连接远程共享文件夹
        /// </summary>
        /// <param name="path">远程共享文件夹的路径</param>
        /// <param name="userName">用户名</param>
        /// <param name="passWord">密码</param>
        /// <returns></returns>
        public bool connectState(string path, string userName, string passWord)
        {
            bool Flag = false;
            Process proc = new Process();
            try
            {
                proc.StartInfo.FileName = "cmd.exe";
                proc.StartInfo.UseShellExecute = false;
                proc.StartInfo.RedirectStandardInput = true;
                proc.StartInfo.RedirectStandardOutput = true;
                proc.StartInfo.RedirectStandardError = true;
                proc.StartInfo.CreateNoWindow = true;
                proc.Start();
                string dosLine = "net use " + path + " " + passWord + " /user:" + userName;
                proc.StandardInput.WriteLine(dosLine);
                proc.StandardInput.WriteLine("exit");
                while (!proc.HasExited)
                {
                    proc.WaitForExit(1000);
                }
                string errormsg = proc.StandardError.ReadToEnd();
                proc.StandardError.Close();
                if (string.IsNullOrEmpty(errormsg))
                {
                    Flag = true;
                }
                else
                {
                    throw new Exception(errormsg);
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                proc.Close();
                proc.Dispose();
            }
            return Flag;
        }

        /// <summary>
        /// 从远程服务器下载文件到本地
        /// </summary>
        /// <param name="src">下载到本地后的文件路径，包含文件的扩展名</param>
        /// <param name="dst">远程服务器路径（共享文件夹路径）</param>
        /// <param name="fileName">远程服务器（共享文件夹）中的文件名称，包含扩展名</param>
        public void TransportRemoteToLocal(string src, string dst, string fileName)  //src：下载到本地后的文件路径     dst：远程服务器路径    fileName:远程服务器dst路径下的文件名
        {
            if (!Directory.Exists(dst))
            {
                Directory.CreateDirectory(dst);
            }
            dst = dst + fileName;
            FileStream inFileStream = new FileStream(dst, FileMode.Open);    //远程服务器文件  此处假定远程服务器共享文件夹下确实包含本文件，否则程序报错

            FileStream outFileStream = new FileStream(src, FileMode.OpenOrCreate);   //从远程服务器下载到本地的文件

            byte[] buf = new byte[inFileStream.Length];

            int byteCount;

            while ((byteCount = inFileStream.Read(buf, 0, buf.Length)) > 0)
            {

                outFileStream.Write(buf, 0, byteCount);

            }

            inFileStream.Flush();

            inFileStream.Close();

            outFileStream.Flush();

            outFileStream.Close();

        }

        /// <summary>
        /// 将本地文件上传到远程服务器共享目录
        /// </summary>
        /// <param name="src">本地文件的绝对路径，包含扩展名</param>
        /// <param name="dst">远程服务器共享文件路径，不包含文件扩展名</param>
        /// <param name="fileName">上传到远程服务器后的文件扩展名</param>
        public void TransportLocalToRemote(string src, string dst, string fileName)    //src
        {
            FileStream inFileStream = new FileStream(src, FileMode.Open);    //此处假定本地文件存在，不然程序会报错   

            if (!Directory.Exists(dst))        //判断上传到的远程服务器路径是否存在
            {
                Directory.CreateDirectory(dst);
            }
            dst = dst + fileName;             //上传到远程服务器共享文件夹后文件的绝对路径

            FileStream outFileStream = new FileStream(dst, FileMode.OpenOrCreate);

            byte[] buf = new byte[inFileStream.Length];

            int byteCount;

            while ((byteCount = inFileStream.Read(buf, 0, buf.Length)) > 0)
            {

                outFileStream.Write(buf, 0, byteCount);

            }

            inFileStream.Flush();

            inFileStream.Close();

            outFileStream.Flush();

            outFileStream.Close();
        }
    }
}

测试访问代码

  public void test() 
        {
            bool status = false;
            ShareDownload sd = new ShareDownload();
            //连接
            status = sd.connectState(@"\\xxx.xx.x.x\e", "administrator", "123456");
            if (status)
            {
                //共享文件夹的目录
                DirectoryInfo theFolder = new DirectoryInfo(@"\\xxx.xx.x.x\e\");
                string filename = theFolder.ToString();
                //执行方法
                //TransportLocalToRemote(@"D:\readme1.txt", filename, "readme1.txt");  //实现将本地文件写入到远程服务器
                sd.TransportRemoteToLocal(@"D:\123.txt", filename, "123.txt");    //实现将远程服务器文件写入到本地
            }
            else
            {
                MessageBox.Show("未能连接！");
            }
            MessageBox.Show("成功");
        }

原文出处连接：https://blog.csdn.net/liuqinghui1990/article/details/76559721