asp.net实现访问局域网共享目录下文件的解决方法

时间:2022-03-09 16:59:48

本文以实例讲述了asp.net实现访问局域网共享目录下文件的解决方法,完整代码如下所示:

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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,
    String 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 tempWindowsIdentity;
    IntPtr token = IntPtr.Zero;
    IntPtr tokenDuplicate = IntPtr.Zero;
    if (RevertToSelf())
    {
      if (LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE,
        LOGON32_PROVIDER_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();
  }
}