卢克奎宁的解决方案看起来不错，但只部分工作在我的ASP。NET MVC应用程序。在同一服务器上使用不同凭证的两个共享，我只能对第一个使用模拟。

WNetAddConnection2的问题还在于它在不同的windows版本上表现不同。这就是为什么我寻找替代品，并找到了LogonUser功能。这是我的代码，也工作在ASP。NET:

public sealed class WrappedImpersonationContext
{
    public enum LogonType : int
    {
        Interactive = 2,
        Network = 3,
        Batch = 4,
        Service = 5,
        Unlock = 7,
        NetworkClearText = 8,
        NewCredentials = 9
    }

    public enum LogonProvider : int
    {
        Default = 0,  // LOGON32_PROVIDER_DEFAULT
        WinNT35 = 1,
        WinNT40 = 2,  // Use the NTLM logon provider.
        WinNT50 = 3   // Use the negotiate logon provider.
    }

    [DllImport("advapi32.dll", EntryPoint = "LogonUserW", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain,
        String lpszPassword, LogonType dwLogonType, LogonProvider dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll")]
    public extern static bool CloseHandle(IntPtr handle);

    private string _domain, _password, _username;
    private IntPtr _token;
    private WindowsImpersonationContext _context;

    private bool IsInContext
    {
        get { return _context != null; }
    }

    public WrappedImpersonationContext(string domain, string username, string password)
    {
        _domain = String.IsNullOrEmpty(domain) ? "." : domain;
        _username = username;
        _password = password;
    }

    // Changes the Windows identity of this thread. Make sure to always call Leave() at the end.
    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Enter()
    {
        if (IsInContext)
            return;

        _token = IntPtr.Zero;
        bool logonSuccessfull = LogonUser(_username, _domain, _password, LogonType.NewCredentials, LogonProvider.WinNT50, ref _token);
        if (!logonSuccessfull)
        {
            throw new Win32Exception(Marshal.GetLastWin32Error());
        }
        WindowsIdentity identity = new WindowsIdentity(_token);
        _context = identity.Impersonate();

        Debug.WriteLine(WindowsIdentity.GetCurrent().Name);
    }

    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Leave()
    {
        if (!IsInContext)
            return;

        _context.Undo();

        if (_token != IntPtr.Zero)
        {
            CloseHandle(_token);
        }
        _context = null;
    }
}

用法:

var impersonationContext = new WrappedImpersonationContext(Domain, Username, Password);
impersonationContext.Enter();

//do your stuff here

impersonationContext.Leave();

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

卢克奎宁的解决方案看起来不错，但只部分工作在我的ASP。NET MVC应用程序。在同一服务器上使用不同凭证的两个共享，我只能对第一个使用模拟。

WNetAddConnection2的问题还在于它在不同的windows版本上表现不同。这就是为什么我寻找替代品，并找到了LogonUser功能。这是我的代码，也工作在ASP。NET:

public sealed class WrappedImpersonationContext
{
    public enum LogonType : int
    {
        Interactive = 2,
        Network = 3,
        Batch = 4,
        Service = 5,
        Unlock = 7,
        NetworkClearText = 8,
        NewCredentials = 9
    }

    public enum LogonProvider : int
    {
        Default = 0,  // LOGON32_PROVIDER_DEFAULT
        WinNT35 = 1,
        WinNT40 = 2,  // Use the NTLM logon provider.
        WinNT50 = 3   // Use the negotiate logon provider.
    }

    [DllImport("advapi32.dll", EntryPoint = "LogonUserW", SetLastError = true, CharSet = CharSet.Unicode)]
    public static extern bool LogonUser(String lpszUsername, String lpszDomain,
        String lpszPassword, LogonType dwLogonType, LogonProvider dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll")]
    public extern static bool CloseHandle(IntPtr handle);

    private string _domain, _password, _username;
    private IntPtr _token;
    private WindowsImpersonationContext _context;

    private bool IsInContext
    {
        get { return _context != null; }
    }

    public WrappedImpersonationContext(string domain, string username, string password)
    {
        _domain = String.IsNullOrEmpty(domain) ? "." : domain;
        _username = username;
        _password = password;
    }

    // Changes the Windows identity of this thread. Make sure to always call Leave() at the end.
    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Enter()
    {
        if (IsInContext)
            return;

        _token = IntPtr.Zero;
        bool logonSuccessfull = LogonUser(_username, _domain, _password, LogonType.NewCredentials, LogonProvider.WinNT50, ref _token);
        if (!logonSuccessfull)
        {
            throw new Win32Exception(Marshal.GetLastWin32Error());
        }
        WindowsIdentity identity = new WindowsIdentity(_token);
        _context = identity.Impersonate();

        Debug.WriteLine(WindowsIdentity.GetCurrent().Name);
    }

    [PermissionSetAttribute(SecurityAction.Demand, Name = "FullTrust")]
    public void Leave()
    {
        if (!IsInContext)
            return;

        _context.Undo();

        if (_token != IntPtr.Zero)
        {
            CloseHandle(_token);
        }
        _context = null;
    }
}

用法:

var impersonationContext = new WrappedImpersonationContext(Domain, Username, Password);
impersonationContext.Enter();

//do your stuff here

impersonationContext.Leave();

如果你不能创建一个本地有效的安全令牌，似乎你已经排除了所有选项栏Win32 API和WNetAddConnection*。

MSDN上关于WNet - PInvoke信息和连接到UNC路径的示例代码的大量信息:

http://www.pinvoke.net/default.aspx/mpr/WNetAddConnection2.html#

MSDN参考:

http://msdn.microsoft.com/en-us/library/aa385391 (VS.85) . aspx

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;
            }
        }
    }
}

我非常喜欢马克·布兰克特的回答，所以我自己做了一个快速的执行。如果还有人急着要的话，这是:

public class NetworkConnection : IDisposable
{
    string _networkName;

    public NetworkConnection(string networkName, 
        NetworkCredential credentials)
    {
        _networkName = networkName;

        var netResource = new NetResource()
        {
            Scope = ResourceScope.GlobalNetwork,
            ResourceType = ResourceType.Disk,
            DisplayType = ResourceDisplaytype.Share,
            RemoteName = networkName
        };

        var userName = string.IsNullOrEmpty(credentials.Domain)
            ? credentials.UserName
            : string.Format(@"{0}\{1}", credentials.Domain, credentials.UserName);

        var result = WNetAddConnection2(
            netResource, 
            credentials.Password,
            userName,
            0);
            
        if (result != 0)
        {
            throw new Win32Exception(result);
        }   
    }

    ~NetworkConnection()
    {
        Dispose(false);
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    protected virtual void Dispose(bool disposing)
    {
        WNetCancelConnection2(_networkName, 0, true);
    }

    [DllImport("mpr.dll")]
    private static extern int WNetAddConnection2(NetResource netResource, 
        string password, string username, int flags);

    [DllImport("mpr.dll")]
    private static extern int WNetCancelConnection2(string name, int flags,
        bool force);
}

[StructLayout(LayoutKind.Sequential)]
public class NetResource
{
    public ResourceScope Scope;
    public ResourceType ResourceType;
    public ResourceDisplaytype DisplayType;
    public int Usage;
    [MarshalAs(UnmanagedType.LPWStr)]
    public string LocalName;
    [MarshalAs(UnmanagedType.LPWStr)]
    public string RemoteName;
    [MarshalAs(UnmanagedType.LPWStr)]
    public string Comment;
    [MarshalAs(UnmanagedType.LPWStr)]
    public string Provider;
}

public enum ResourceScope : int
{
    Connected = 1,
    GlobalNetwork,
    Remembered,
    Recent,
    Context
};

public enum ResourceType : int
{
    Any = 0,
    Disk = 1,
    Print = 2,
    Reserved = 8,
}

public enum ResourceDisplaytype : int
{
    Generic = 0x0,
    Domain = 0x01,
    Server = 0x02,
    Share = 0x03,
    File = 0x04,
    Group = 0x05,
    Network = 0x06,
    Root = 0x07,
    Shareadmin = 0x08,
    Directory = 0x09,
    Tree = 0x0a,
    Ndscontainer = 0x0b
}