以下内容来源：

1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Runtime.InteropServices; 6  7 namespace WebApplication1 8 { 9     public class WNetHelper10     {11 12         #region 通过身份模拟实现远程资源访问13 14         // logon types15         const int LOGON32_LOGON_INTERACTIVE = 2;16         const int LOGON32_LOGON_NETWORK = 3;17         const int LOGON32_LOGON_NEW_CREDENTIALS = 9;18         // logon providers19         const int LOGON32_PROVIDER_DEFAULT = 0;20         const int LOGON32_PROVIDER_WINNT50 = 3;21         const int LOGON32_PROVIDER_WINNT40 = 2;22         const int LOGON32_PROVIDER_WINNT35 = 1;23 24         [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]25         public static extern int LogonUser(String lpszUserName,26             String lpszDomain,27             String lpszPassword,28             int dwLogonType,29             int dwLogonProvider,30             ref IntPtr phToken);31 32         [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]33         public static extern int DuplicateToken(IntPtr hToken,34             int impersonationLevel,35             ref IntPtr hNewToken);36 37         [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]38         public static extern bool RevertToSelf();39 40         [DllImport("kernel32.dll", CharSet = CharSet.Auto)]41         public static extern bool CloseHandle(IntPtr handle);42 43         private static System.Security.Principal.WindowsImpersonationContext impersonationContext;44         /// 
45         /// 连接网络资源46         /// 
47         /// IP/计算机名48         /// 用户名49         /// 密码50         /// 
      51         public static bool impersonateValidUser(String domain, String userName, String password)52         {53             System.Security.Principal.WindowsIdentity tempWindowsIdentity;54             IntPtr token = IntPtr.Zero;55             IntPtr tokenDuplicate = IntPtr.Zero;56 57             if (RevertToSelf())58             {59                 // 这里使用LOGON32_LOGON_NEW_CREDENTIALS来访问远程资源。60                 // 如果要（通过模拟用户获得权限）实现服务器程序，访问本地授权数据库可61                 // 以用LOGON32_LOGON_INTERACTIVE62                 if (LogonUser(userName, domain, password, LOGON32_LOGON_NEW_CREDENTIALS,63                     LOGON32_PROVIDER_DEFAULT, ref token) != 0)64                 {65                     if (DuplicateToken(token, 2, ref tokenDuplicate) != 0)66                     {67                         tempWindowsIdentity = new System.Security.Principal.WindowsIdentity(tokenDuplicate);68                         impersonationContext = tempWindowsIdentity.Impersonate();69                         if (impersonationContext != null)70                         {71                             System.AppDomain.CurrentDomain.SetPrincipalPolicy(System.Security.Principal.PrincipalPolicy.WindowsPrincipal);72                             System.Security.Principal.IPrincipal pr = System.Threading.Thread.CurrentPrincipal;73                             System.Security.Principal.IIdentity id = pr.Identity;74                             CloseHandle(token);75                             CloseHandle(tokenDuplicate);76                             return true;77                         }78                     }79                 }80             }81             if (token != IntPtr.Zero)82                 CloseHandle(token);83             if (tokenDuplicate != IntPtr.Zero)84                 CloseHandle(tokenDuplicate);85             return false;86         }87 88         public static void undoImpersonation()89         {90             impersonationContext.Undo();91         }92 93         #endregion94     }95 }

1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.UI; 6 using System.Web.UI.WebControls; 7 using System.IO; 8  9 namespace WebApplication110 {11     public partial class WebForm1 : System.Web.UI.Page12     {13         protected void Page_Load(object sender, EventArgs e)14         {15             TestFunc();16           17         }18 19         public void TestFunc()20         {21             bool isImpersonated = false;22             try23             {24                 if (WNetHelper.impersonateValidUser("Netnetnet-pc", "admin2", "123"))25                 {26                     isImpersonated = true;27                     System.IO.File.Copy(@"\\Netnetnet-pc\站点发布\a.txt", "d:\\a1.txt", true);28                 }29             }30             finally31             {32                 if (isImpersonated)33                     WNetHelper.undoImpersonation();34             }35         }36     }37 }