asp.net implementation of access to the local area network shared directory file Solution _ Practical Skills

This article is an example of the ASP.net implementation access to the local area network shared directory of files under the solution, the complete code is as follows:

Using System; 
Using System.Collections; 
Using System.Configuration; 
Using System.Data; 
Using System.Linq; 
Using System.Web; 
Using System.Web.Security; 
Using System.Web.UI; 
Using System.Web.UI.HtmlControls; 
Using System.Web.UI.WebControls; 
Using System.Web.UI.WebControls.WebParts; 
Using System.Xml.Linq; 
Using System.IO; 
Using System.Security.Principal; 
Using System.Runtime.InteropServices; 
  Public partial class _default:system.web.ui.page {public const int logon32_logon_interactive = 2; 
  public const int logon32_provider_default = 0; 
  WindowsImpersonationContext impersonationcontext; [DllImport ("advapi32.dll")] public static extern int Logonusera (String lpszUserName, String lpszdomain, Strin 
  G Lpszpassword, int dwlogontype, int dwlogonprovider, ref IntPtr phtoken);  [DllImport ("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int DuplicateToken (INTPTR htoken, int impersonationlevel, REF IntPtr hNewToken); 
  [DllImport ("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern bool RevertToSelf (); 
  [DllImport ("kernel32.dll", CharSet = CharSet.Auto)] public static extern bool CloseHandle (INTPTR handle); 
      public void Page_Load (Object s, EventArgs e) {if (impersonateValidUser ("Lucas", "Workgroup", "Lcas")) { 
      string path = @ "//zhehui001/lu"; 
      foreach (string f in Directory.GetFiles (path)) {Response.Write (f); 
    } undoimpersonation (); else {//your impersonation failed. 
    Therefore, include a fail-safe mechanism here. } private bool impersonateValidUser (string userName, string domain, string password) {WindowsIdentity tem 
    pwindowsidentity; 
    IntPtr token = IntPtr.Zero; 
    IntPtr tokenduplicate = IntPtr.Zero; if (RevertToSelf ()) {if Logonusera (userName, domain, password, logon32_logon_interactive, logon32_p RoVider_default, ref token)!= 0) {if (DuplicateToken (token, 2, ref tokenduplicate)!= 0) { 
          tempWindowsIdentity = new WindowsIdentity (tokenduplicate); 
          impersonationcontext = Tempwindowsidentity.impersonate (); 
            if (impersonationcontext!= null) {CloseHandle (token); 
            CloseHandle (tokenduplicate); 
          return true; 
    {}}} if (token!= intptr.zero) CloseHandle (token); 
    if (tokenduplicate!= IntPtr.Zero) CloseHandle (tokenduplicate); 
  return false; 
  private void Undoimpersonation () {Impersonationcontext.undo (); } 
}