namespace WindowsApplication1
{
    public class MyMap
    {
        [DllImport("mpr.dll", EntryPoint = "WNetAddConnection2")]
        public static extern uint WNetAddConnection2(
            [In] NETRESOURCE lpNetResource,
            string lpPassword,
            string lpUsername,
            uint dwFlags);
        
        [DllImport("Mpr.dll")]
        public static extern uint WNetCancelConnection2(
            string lpName,
            uint dwFlags,
            bool fForce);
        
        [StructLayout(LayoutKind.Sequential)]
        public class NETRESOURCE
        {
            public int dwScope;
            public int dwType;
            public int dwDisplayType;
            public int dwUsage;
            public string LocalName;
            public string RemoteName;
            public string Comment;
            public string Provider;
        }

        // remoteNetworkPath format:  @"\\192.168.1.48\sharefolder"
        // localDriveName format:     @"E:"
        public static bool CreateMap(string userName, string password, string remoteNetworkPath, string localDriveName)
        {            
            NETRESOURCE myNetResource = new NETRESOURCE();
            myNetResource.dwScope = 2;       //2:RESOURCE_GLOBALNET
            myNetResource.dwType = 1;        //1:RESOURCETYPE_ANY
            myNetResource.dwDisplayType = 3; //3:RESOURCEDISPLAYTYPE_GENERIC
            myNetResource.dwUsage = 1;       //1: RESOURCEUSAGE_CONNECTABLE
            myNetResource.LocalName = localDriveName;
            myNetResource.RemoteName = remoteNetworkPath;
            myNetResource.Provider = null;

            uint nret = WNetAddConnection2(myNetResource, password, userName, 0);

            if (nret == 0)
                return true;
            else
                return false;
        }

        // localDriveName format:     @"E:"
        public static bool DeleteMap(string localDriveName)
        {
            uint nret = WNetCancelConnection2(localDriveName, 1, true);

            if (nret == 0)
                return true;
            else
                return false;
        }

        public void test()
        {
            // 注意：
            // remote、local,、username的格式一定要正確,，否則可能出現(xiàn)錯(cuò)誤
            string remote = @"\\192.168.1.48\generals";
            string local = @"P:";
            string username = @"Domain\UserName";
            string password = @"Password";
            bool ret = MyMap.CreateMap(username, password, remote, local);
            if (ret)
            {
                //do what you want:
                // ...
                //File.Copy("q:\\test.htm", "c:\\test.htm");

                MyMap.DeleteMap(local);
            }
        }
    }
}

三、使用WebClient類

由于WebClient類可以上傳下載文件,，并且支持以http:、https:和file:開(kāi)頭的URI,，所以可以用WebClient類來(lái)傳輸文件,。
添加System.Net命名空間后使用如下代碼下載文件：

        public void TestFunc()
        {
            bool isImpersonated = false;
            try
            {
                if (impersonateValidUser("UserName", "Domain", "Password"))
                {
                    isImpersonated = true;
                    //do what you want now, as the special user
                    // ...
                    File.Copy(@"\\192.168.1.48\generals\now.htm", "c:\\now.htm", true);
                }
            }
            finally
            {
                if (isImpersonated)
                    undoImpersonation();
            }
        }
    }
}


五,、比較

方法一通過(guò)調(diào)用Shell命令Net Use實(shí)現(xiàn),，有點(diǎn)笨拙。
方法二和方法一有些相似之處,。映射遠(yuǎn)程資源,，然后訪問(wèn)。
方法三由于會(huì)有超時(shí)異常出現(xiàn),，所以在網(wǎng)絡(luò)速度快,、傳輸小文件時(shí)是可以的,。
方法四通過(guò)身份模擬實(shí)現(xiàn)遠(yuǎn)程資源訪問(wèn)。一些服務(wù)器進(jìn)程就是通過(guò)這種方式運(yùn)行的,。這種方法也是我的最愛(ài),。

六、要注意的地方

關(guān)于這幾種方法,，google后都可以找到一些文章,。但是等到自己實(shí)際測(cè)試時(shí)，有時(shí)會(huì)出現(xiàn)各種小錯(cuò)誤,，
這些錯(cuò)誤基本來(lái)源于兩方面：

1,、函數(shù)的參數(shù)選擇有問(wèn)題，和自己的環(huán)境不相符,。
比如        
public static extern int LogonUser(String lpszUserName,
            String lpszDomain,
            String lpszPassword,
            int dwLogonType,
            int dwLogonProvider,
            ref IntPtr phToken);
中的dwLogonType,，要訪問(wèn)遠(yuǎn)程資源就要用LOGON32_LOGON_NEW_CREDENTIALS，
要模擬本機(jī)用戶就要用LOGON32_LOGON_INTERACTIVE,。

2,、函數(shù)的參數(shù)格式有問(wèn)題。

    a,、比如
    public static extern int LogonUser(String lpszUserName,
            String lpszDomain,
            String lpszPassword,
            int dwLogonType,
            int dwLogonProvider,
            ref IntPtr phToken);
    中的lpszUserName,、lpszDomain、lpszPassword就要寫清楚,。

    我就在這遇到過(guò)問(wèn)題,，第一次測(cè)試時(shí)，遠(yuǎn)程服務(wù)器就是一臺(tái)獨(dú)立的文件服務(wù)器,，這是我的調(diào)用方式：
        LogonUser("myname", "192.168.1.48", "password", LOGON32_LOGON_NEW_CREDENTIALS,
                    LOGON32_PROVIDER_DEFAULT, ref token);

    第二次測(cè)試時(shí),，遠(yuǎn)程服務(wù)器是域MyDomain中的一個(gè)成員服務(wù)器，提供文件服務(wù),。這時(shí)代碼就應(yīng)該是：
        LogonUser("myname", "MyDomain", "password", LOGON32_LOGON_NEW_CREDENTIALS,
                    LOGON32_PROVIDER_DEFAULT, ref token);

    注意,，代碼中是MyDomain而不是IP地址。


    b,、再如：

    參考上面代碼
            string remote = @"\\192.168.1.48\generals";
            string local = @"P:";
            string username = @"Domain\UserName";
            string password = @"Password";

    如果@"\\192.168.1.48\generals"變成@"\\192.168.1.48\generals\”就會(huì)出錯(cuò),；
    如果是域中的用戶，那么把@"Domain\UserName"變成@"UserName"就會(huì)出錯(cuò),。