C#.NET - Accessing Share folder files with Network Authentication

Purpose :

Accessing Share folder files with Network Authentication

Step 1 : Create a class named SoddingNetworkAuth

Class Name : SoddingNetworkAuth.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.ComponentModel;

using System.Runtime.InteropServices;

using System.Security.Principal;

public class NetworkAuth : IDisposable

{

    [DllImport("advapi32.dll", SetLastError = true)]

    private static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken);

    [DllImport("kernel32", SetLastError = true)]

    private static extern bool CloseHandle(IntPtr hObject);

    private IntPtr userHandle = IntPtr.Zero;

    private WindowsImpersonationContext impersonationContext;

    public NetworkAuth(string user, string domain, string password)

    {

        try

        {

            if (!string.IsNullOrEmpty(user))

            {

                // Call LogonUser to get a token for the user 

                bool loggedOn = LogonUser(user, domain, password,

                 9 /*(int)LogonType.LOGON32_LOGON_NEW_CREDENTIALS*/,

                 3 /*(int)LogonProvider.LOGON32_PROVIDER_WINNT50*/,

                out userHandle);

                if (!loggedOn)

                    throw new Win32Exception(Marshal.GetLastWin32Error());

                // Begin impersonating the user 

                impersonationContext = WindowsIdentity.Impersonate(userHandle);

            }

        }

        catch (Exception ex)

        {

            ExceptionHandler.HandleException(ex.ToString());

        }

    }

    public void Dispose()

    {

        try

        {

            if (userHandle != IntPtr.Zero)

                CloseHandle(userHandle);

            if (impersonationContext != null)

                impersonationContext.Undo();

        }

        catch (Exception ex)

        {

            ExceptionHandler.HandleException(ex.ToString());

        }

    }

}

Step 2 : Place it anywhere inside the form and use this below code to copy file

#region "File copying with NetworkAuth "

using (new NetworkAuth("sShareFolder_Username","sShareFolderName", "sShareFolder_Password"))

{

      try

            {

                /* This is for checking voice file details */

                if (!File.Exists("GiveFilePath"))

                {

                    File.Copy("SourcePath", "DestinationPath", true);

                }

            }

            catch (Exception ex)

            {

            }

}