一种可行的方法是使用WindowsIdentity。模拟(并更改线程主体)成为所需的用户，如下所示。回到p/invoke，不过，恐怕……

另一个厚脸皮的(同样不理想的)选择可能是生成一个流程来完成这项工作……ProcessStartInfo接受. username， . password和. domain。

最后-也许在一个有权限的专用帐户中运行服务?(删除，因为你已经澄清这不是一个选项)。

你应该像这样添加一行:

<identity impersonate="true" userName="domain\user" password="****" />

在你的web.config中。

更多的信息。

VB。热爱VB。NET等价的Luke Quinane的代码(谢谢Luke!)

Imports System
Imports System.Net
Imports System.Runtime.InteropServices
Imports System.ComponentModel

Public Class NetworkConnection
    Implements IDisposable

    Private _networkName As String

    Public Sub New(networkName As String, credentials As NetworkCredential)
        _networkName = networkName

        Dim netResource = New NetResource() With {
             .Scope = ResourceScope.GlobalNetwork,
             .ResourceType = ResourceType.Disk,
             .DisplayType = ResourceDisplaytype.Share,
             .RemoteName = networkName
        }

        Dim userName = If(String.IsNullOrEmpty(credentials.Domain), credentials.UserName, String.Format("{0}\{1}", credentials.Domain, credentials.UserName))

        Dim result = WNetAddConnection2(NetResource, credentials.Password, userName, 0)

        If result <> 0 Then
            Throw New Win32Exception(result, "Error connecting to remote share")
        End If
    End Sub

    Protected Overrides Sub Finalize()
        Try
            Dispose (False)
        Finally
            MyBase.Finalize()
        End Try
    End Sub

    Public Sub Dispose() Implements IDisposable.Dispose
        Dispose (True)
        GC.SuppressFinalize (Me)
    End Sub

    Protected Overridable Sub Dispose(disposing As Boolean)
        WNetCancelConnection2(_networkName, 0, True)
    End Sub

    <DllImport("mpr.dll")> _
    Private Shared Function WNetAddConnection2(netResource As NetResource, password As String, username As String, flags As Integer) As Integer
    End Function

    <DllImport("mpr.dll")> _
    Private Shared Function WNetCancelConnection2(name As String, flags As Integer, force As Boolean) As Integer
    End Function

End Class

<StructLayout(LayoutKind.Sequential)> _
Public Class NetResource
    Public Scope As ResourceScope
    Public ResourceType As ResourceType
    Public DisplayType As ResourceDisplaytype
    Public Usage As Integer
    Public LocalName As String
    Public RemoteName As String
    Public Comment As String
    Public Provider As String
End Class

Public Enum ResourceScope As Integer
    Connected = 1
    GlobalNetwork
    Remembered
    Recent
    Context
End Enum

Public Enum ResourceType As Integer
    Any = 0
    Disk = 1
    Print = 2
    Reserved = 8
End Enum

Public Enum ResourceDisplaytype As Integer
    Generic = &H0
    Domain = &H1
    Server = &H2
    Share = &H3
    File = &H4
    Group = &H5
    Network = &H6
    Root = &H7
    Shareadmin = &H8
    Directory = &H9
    Tree = &HA
    Ndscontainer = &HB
End Enum

7年后的今天，我面临着同样的问题，我想分享我的解决方案。

它是复制和粘贴准备好了:-)这里是:

步骤1

在你的代码中(当你需要使用权限做一些事情的时候)

ImpersonationHelper.Impersonate(domain, userName, userPassword, delegate
                            {
                                //Your code here 
                                //Let's say file copy:
                                if (!File.Exists(to))
                                {
                                    File.Copy(from, to);
                                }
                            });

步骤2

Helper文件起着神奇的作用

using System;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Security.Principal;    
using Microsoft.Win32.SafeHandles;


namespace BlaBla
{
    public sealed class SafeTokenHandle : SafeHandleZeroOrMinusOneIsInvalid
    {
        private SafeTokenHandle()
            : base(true)
        {
        }

        [DllImport("kernel32.dll")]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [SuppressUnmanagedCodeSecurity]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool CloseHandle(IntPtr handle);

        protected override bool ReleaseHandle()
        {
            return CloseHandle(handle);
        }
    }

    public class ImpersonationHelper
    {
        [DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        private static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword,
        int dwLogonType, int dwLogonProvider, out SafeTokenHandle phToken);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        private extern static bool CloseHandle(IntPtr handle);

        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        public static void Impersonate(string domainName, string userName, string userPassword, Action actionToExecute)
        {
            SafeTokenHandle safeTokenHandle;
            try
            {

                const int LOGON32_PROVIDER_DEFAULT = 0;
                //This parameter causes LogonUser to create a primary token.
                const int LOGON32_LOGON_INTERACTIVE = 2;

                // Call LogonUser to obtain a handle to an access token.
                bool returnValue = LogonUser(userName, domainName, userPassword,
                    LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT,
                    out safeTokenHandle);
                //Facade.Instance.Trace("LogonUser called.");

                if (returnValue == false)
                {
                    int ret = Marshal.GetLastWin32Error();
                    //Facade.Instance.Trace($"LogonUser failed with error code : {ret}");

                    throw new System.ComponentModel.Win32Exception(ret);
                }

                using (safeTokenHandle)
                {
                    //Facade.Instance.Trace($"Value of Windows NT token: {safeTokenHandle}");
                    //Facade.Instance.Trace($"Before impersonation: {WindowsIdentity.GetCurrent().Name}");

                    // Use the token handle returned by LogonUser.
                    using (WindowsIdentity newId = new WindowsIdentity(safeTokenHandle.DangerousGetHandle()))
                    {
                        using (WindowsImpersonationContext impersonatedUser = newId.Impersonate())
                        {
                            //Facade.Instance.Trace($"After impersonation: {WindowsIdentity.GetCurrent().Name}");
                            //Facade.Instance.Trace("Start executing an action");

                            actionToExecute();

                            //Facade.Instance.Trace("Finished executing an action");
                        }
                    }
                    //Facade.Instance.Trace($"After closing the context: {WindowsIdentity.GetCurrent().Name}");
                }

            }
            catch (Exception ex)
            {
                //Facade.Instance.Trace("Oh no! Impersonate method failed.");
                //ex.HandleException();
                //On purpose: we want to notify a caller about the issue /Pavel Kovalev 9/16/2016 2:15:23 PM)/
                throw;
            }
        }
    }
}

您可以更改线程标识，或者P/Invoke WNetAddConnection2。我更喜欢后者，因为我有时需要为不同的位置维护多个凭证。我把它包装成一个IDisposable，然后调用WNetCancelConnection2来删除信用(避免多个用户名错误):

using (new NetworkConnection(@"\\server\read", readCredentials))
using (new NetworkConnection(@"\\server2\write", writeCredentials)) {
   File.Copy(@"\\server\read\file", @"\\server2\write\file");
}

一种可行的方法是使用WindowsIdentity。模拟(并更改线程主体)成为所需的用户，如下所示。回到p/invoke，不过，恐怕……

另一个厚脸皮的(同样不理想的)选择可能是生成一个流程来完成这项工作……ProcessStartInfo接受. username， . password和. domain。

最后-也许在一个有权限的专用帐户中运行服务?(删除，因为你已经澄清这不是一个选项)。