Accessing Shared Folders in ASP.NET

Believe me it’s easy. If only you won’t get caught up with the 'Impersonation' word. A lot of sites took me for a jolly ride on the Impersonation road.

Here's a demo of the code:

 
 using System;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Net;
 
 public class ShareThis
 {
 
  //used in calling WNetAddConnection2
  [StructLayout (LayoutKind.Sequential)]
   public struct NETRESOURCE
  {
   public int dwScope;
   public int dwType;
   public int dwDisplayType;
   public int dwUsage;
   [MarshalAs (UnmanagedType.LPStr)]
   public string lpLocalName;
   [MarshalAs (UnmanagedType.LPStr)]
   public string lpRemoteName;
   [MarshalAs (UnmanagedType.LPStr)]
   public string lpComment;
   [MarshalAs (UnmanagedType.LPStr)]
   public string lpProvider;
  }
 
  //WIN32API - WNetAddConnection2
  [DllImport("mpr.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)]
  private static extern int WNetAddConnection2A (
   [MarshalAs (UnmanagedType.LPArray)]
   NETRESOURCE [] lpNetResource,
   [MarshalAs (UnmanagedType.LPStr)]
   string lpPassword,
   [MarshalAs (UnmanagedType.LPStr)]
   string lpUserName,
   int dwFlags
   );
 
  //WIN32API - WNetCancelConnection2
  [DllImport("mpr.dll", CharSet=System.Runtime.InteropServices.CharSet.Auto)]
  private static extern int WNetCancelConnection2A (
   [MarshalAs (UnmanagedType.LPStr)]
   string lpName,
   int dwFlags,
   int fForce
   );
 
  public static void CopyFile (string share, string username, string password,
   string dirFrom, string dirTo, string filename)
  {
   NETRESOURCE [] nr = new NETRESOURCE [1];
   nr[0].lpRemoteName = share;
   nr[0].lpLocalName = ""; //mLocalName;
   nr[0].dwType = 1; //disk
   nr[0].dwDisplayType = 0;
   nr[0].dwScope = 0;
   nr[0].dwUsage = 0;
   nr[0].lpComment = "";
   nr[0].lpProvider = "";
   WNetAddConnection2A (nr, password, username, 0);
 
 

  // Do you stuff here, copy files, create dirs etc
   File.Copy (dirFrom + "\\" + filename, dirTo + "\\" + filename);
 
   WNetCancelConnection2A (share, 0, -1);
  }
 
  public static void Main(string[] args)
  {
   CopyFile(@"\\sa191", "username", "password", @"f:\shared",
    @"\\sa191\shared", "123.shp");
  }
 }