本文实例为大家分享了C#读写共享文件夹的具体代码，供大家参考，具体内容如下

该试验分以下步骤：

1、在服务器设置一个共享文件夹，在这里我的服务器ip地址是10.80.88.180，共享文件夹名字是test，test里面有两个文件：good.txt和bad.txt，访问权限，用户名是admin，密码是admin。

2、新建一个webapplication项目，在前台页面加一个listbox，ID是ListBox1.

3、添加后台代码如下：其中包含的功能是读文件，这里以读good 文件为例；写文件，这里以写bad文件为例；还有是将test文件夹下的文件名列到listbox中。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Diagnostics;
using System.IO;


namespace WebApplication2
{

 public class FileShare
 {
  public FileShare() { }

  public static bool connectState(string path)
  {
   return connectState(path,"","");
  }

  public static 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 + " /User:" + userName + " " + passWord + " /PERSISTENT:YES";
    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;
  }


  //read file
  public static void ReadFil【文章出处:外国服务器】es(string path)
  {
   try
   {
    // Create an instance of StreamReader to read from a file.
    // The using statement also closes the StreamReader.
    using (StreamReader sr = new StreamReader(path))
    {
     String line;
     // Read and display lines from the file until the end of 
     // the file is reached.
     while ((line = sr.ReadLine()) != null)
     {
      Console.WriteLine(line);
      
     }
    }
   }
   catch (Exception e)
   {
    // Let the user know what went wrong.
    Console.WriteLine("The file could not be read:");
    Console.WriteLine(e.Message);
   } 

  }

  //write file
  public static void WriteFiles(string path)
  {
   try
   {
    // Create an instance of StreamWriter to write text to a file.
    // The using statement also closes the StreamWriter.
    using (StreamWriter sw = new StreamWriter(path))
    {
     // Add some text to the file.
     sw.Write("This is the ");
     sw.WriteLine("header for the file.");
     sw.WriteLine("-------------------");
     // Arbitrary objects can also be written to the file.
     sw.Write("The date is: ");
     sw.WriteLine(DateTime.Now);
    }
   }
   catch (Exception e)
   {
    // Let the user know what went wrong.
    Console.WriteLine("The file could not be read:");
    Console.WriteLine(e.Message);
   }
  }
 }

 public partial class _Default : System.Web.UI.Page
 {
  protected void Page_Load(object sender, EventArgs e)
  {
   
   bool status = false;

   //连接共享文件夹
   status = FileShare.connectState(@"\\10.80.88.180\test", "admin", "admin");
   if (status)
   {
    DirectoryInfo theFolder = new DirectoryInfo(@"\\10.80.88.180\test");

    //先测试读文件，把目录路径与文件名连接
    string filename = theFolder.ToString()+"\\good.txt";
    FileShare.ReadFiles(filename);

    //测试写文件，拼出完整的路径
    filename = theFolder.ToString() + "\\bad.txt";
    FileShare.WriteFiles(filename);
    
    //遍历共享文件夹，把共享文件夹下的文件列表列到listbox
    foreach (FileInfo nextFile in theFolder.GetFiles())
    {
     ListBox1.Items.Add(nextFile.Name);
    }
   }
   else
   {
    ListBox1.Items.Add("未能连接！");
   }
  }
 }
} 

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