将文件写到另一台服务器

 //通过模拟用户获得权限登录
    public class ConnectHelper
    {
        // logon types
        const int LOGON32_LOGON_INTERACTIVE = 2;
        const int LOGON32_LOGON_NETWORK = 3;
        const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
        // logon providers
        const int LOGON32_PROVIDER_DEFAULT = 0;
        const int LOGON32_PROVIDER_WINNT50 = 3;
        const int LOGON32_PROVIDER_WINNT40 = 2;
        const int LOGON32_PROVIDER_WINNT35 = 1;

        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern int LogonUser(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);

        private static WindowsImpersonationContext impersonationContext;

        public static bool impersonateValidUser(String userName, String domain, String password)
        {
            WindowsIdentity tempWindowsIdentity;
            IntPtr token = IntPtr.Zero;
            IntPtr tokenDuplicate = IntPtr.Zero;

            if (RevertToSelf())
            {
                // 这里使用LOGON32_LOGON_NEW_CREDENTIALS来访问远程资源。
                // 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
                // 以用LOGON32_LOGON_INTERACTIVE
                if (LogonUser(userName, domain, password, LOGON32_LOGON_NEW_CREDENTIALS,
                    LOGON32_PROVIDER_DEFAULT, ref token) != 0)
                {
                    if (DuplicateToken(token, 2, ref tokenDuplicate) != 0)
                    {
                        tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
                        impersonationContext = tempWindowsIdentity.Impersonate();
                        if (impersonationContext != null)
                        {
                            System.AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
                            IPrincipal pr = System.Threading.Thread.CurrentPrincipal;
                            IIdentity id = pr.Identity;
                            CloseHandle(token);
                            CloseHandle(tokenDuplicate);
                            return true;
                        }
                    }
                }
            }

            if (token != IntPtr.Zero)
                CloseHandle(token);

            if (tokenDuplicate != IntPtr.Zero)
                CloseHandle(tokenDuplicate);

            return false;
        }

        public static void undoImpersonation()
        {
            impersonationContext.Undo();
        }

     
    }

    /// <summary>
        /// 将文件写到另一台服务器
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="s"></param>
        private static void WriteFile(string fileName, string s)
        {
            try
            {
                if (ConnectHelper.impersonateValidUser(username, endpoint, password))
                {
                    log("访问远程服务器成功"+DateTime.Now.ToString());
                    string objPath = ConfigurationManager.AppSettings["xmlFilePath"];
                    FileStream fsw = new FileStream(objPath + fileName.ToString().Trim() + ".xml", FileMode.Create, FileAccess.Write);
                    StreamWriter sw = new StreamWriter(fsw, Encoding.UTF8);
                    sw.BaseStream.Seek(0, SeekOrigin.End);
                    sw.Write(s);
                    sw.Flush();
                    sw.Close();
                    fsw.Close();
                }
            }
            catch (Exception ex)
            {
                log("访问远程服务器失败" + DateTime.Now.ToString() + ex.ToString());
                throw;
            }
            finally
            {
                ConnectHelper.undoImpersonation();
            }

        }

转自http://www.cnblogs.com/h2appy/articles/1204277.html