Accessing Shared Folders in ASP.NET

Believe me its easy. If only you wont get caught up with the 'Impersonation' word. A lot of sites took me for a jolly ride on the Impersonation road. Luckily I found the answer on Experts Exchange.

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;
        //disknr[0].dwDisplayType = 0;

        nr[0].dwScope = 0; nr[0].dwUsage = 0;
        nr[0].lpComment = "";
        nr[0].lpProvider = "";
        
        WNetAddConnection2A(nr, password, username, 0);
        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");
    }
}