如何读取远程目录中的文件

Question

如何访问远程目录中的文件。如何提供用户名和密码。这样我就可以从那里读取文件。请在c#中提供解决方案。

我已经检查过了：Directory on another machine - Login credentials

但无法理解。任何有效的代码都会有所帮助。

Answer 1

这就像使用提供的凭据创建与远程计算机的连接，然后对文件进行操作。

看看下面的代码，它提供了访问远程机器的助手，

public class NetworkConnection : IDisposable
 {
     string _networkName;
     uint dwFlags;
     public NetworkConnection(string networkName, NetworkCredential credentials)
     {
         _networkName = networkName;

         var netResource = new NetResource()
         {
             Scope = ResourceScope.GlobalNetwork,
             ResourceType = ResourceType.Disk,
             DisplayType = ResourceDisplaytype.Share,
             RemoteName = networkName
         };

         var userName = string.IsNullOrEmpty(credentials.Domain)
             ? credentials.UserName
             : string.Format(@"{0}\{1}", credentials.Domain, credentials.UserName);

         var result = WNetAddConnection2(netResource,"","",0x00000008 | 0x00000010);

         if (result != 0)
         {
             string strErrMsg = "";
             if (result == 67)
             {
                 strErrMsg = "The network name cannot be found.";
             }
             if (result == 86)
             {
                 strErrMsg = "Invalid UserName or Password for ProBiz server";
             }
             else if (result == 1219)
             {
                 strErrMsg = "Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed.Close application to Disconnect all previous connections to the server or shared resource and try again.";
             }

             throw new Win32Exception(result, "Error connecting to "+networkName+" remote share.Error Code:"+result.ToString()+"."+strErrMsg);
         }
         else
         {
             MessageBox.Show("Test connection is successful for "+ networkName);
         }
     }

     ~NetworkConnection()
     {
         Dispose(false);
     }

     public void Dispose()
     {
         Dispose(true);
         GC.SuppressFinalize(this);
     }

     protected virtual void Dispose(bool disposing)
     {
         WNetCancelConnection2(_networkName,  1, true  );
         var command = "NET USE  /delete *";
         ExecuteCommand(command, 5000);

     }
     public static int ExecuteCommand(string command, int timeout)
     {
         var processInfo = new ProcessStartInfo("cmd.exe", "/C " + command)
         {
             CreateNoWindow = true,
             UseShellExecute = false,
             WorkingDirectory = "C:\\",
         };

         var process = Process.Start(processInfo);
         process.WaitForExit(timeout);
         var exitCode = process.ExitCode;
         process.Close();
         return exitCode;
     } 

     [DllImport("mpr.dll")]
     private static extern int WNetAddConnection2(NetResource netResource,
         string password, string username, int flags);

     [DllImport("mpr.dll")]
     private static extern int WNetCancelConnection2(string name, int flags,
         bool force);
 }

 [StructLayout(LayoutKind.Sequential)]
 public class NetResource
 {
     public ResourceScope Scope;
     public ResourceType ResourceType;
     public ResourceDisplaytype DisplayType;
     public int Usage;
     public string LocalName;
     public string RemoteName;
     public string Comment;
     public string Provider;
 }

 public enum ResourceScope : int
 {
     Connected = 1,
     GlobalNetwork,
     Remembered,
     Recent,
     Context
 };

 public enum ResourceType : int
 {
     Any = 0,
     Disk = 1,
     Print = 2,
     Reserved = 8,
 }

 public enum ResourceDisplaytype : int
 {
     Generic = 0x0,
     Domain = 0x01,
     Server = 0x02,
     Share = 0x03,
     File = 0x04,
     Group = 0x05,
     Network = 0x06,
     Root = 0x07,
     Shareadmin = 0x08,
     Directory = 0x09,
     Tree = 0x0a,
     Ndscontainer = 0x0b
 }