Windows服務中讀取網絡映射路徑無法訪問

最近做一個數據同步的功能，需要訪問映射磁盤下的目錄，使用Windows服務進行部署后台運行。但在部署過程中，出現對映射目錄不識別的問題。使用exe程序讀取則沒有問題。

根據網上資料，各種添加權限都不起作用。最終，找的兩篇博文（由於記錄博客時，無法找到相關連接說明。非常感謝兩位園友）進行處理則能訪問。

通過使用以下兩部操作則可完成。

1、配置可遠程訪問共享目錄的用戶。在服務啟動過程中，使用此賬號（與訪問遠程目錄的用戶名和密碼一致）進行登錄

 

 

 

2、通過使用C#直接訪問遠程目錄 （感謝園友提供）

 public enum ERROR_ID
    {
        ERROR_SUCCESS = 0,  // Success
        ERROR_BUSY = 170,
        ERROR_MORE_DATA = 234,
        ERROR_NO_BROWSER_SERVERS_FOUND = 6118,
        ERROR_INVALID_LEVEL = 124,
        ERROR_ACCESS_DENIED = 5,
        ERROR_INVALID_PASSWORD = 86,
        ERROR_INVALID_PARAMETER = 87,
        ERROR_BAD_DEV_TYPE = 66,
        ERROR_NOT_ENOUGH_MEMORY = 8,
        ERROR_NETWORK_BUSY = 54,
        ERROR_BAD_NETPATH = 53,
        ERROR_NO_NETWORK = 1222,
        ERROR_INVALID_HANDLE_STATE = 1609,
        ERROR_EXTENDED_ERROR = 1208,
        ERROR_DEVICE_ALREADY_REMEMBERED = 1202,
        ERROR_NO_NET_OR_BAD_PATH = 1203
    }

    public enum RESOURCE_SCOPE
    {
        RESOURCE_CONNECTED = 1,
        RESOURCE_GLOBALNET = 2,
        RESOURCE_REMEMBERED = 3,
        RESOURCE_RECENT = 4,
        RESOURCE_CONTEXT = 5
    }

    public enum RESOURCE_TYPE
    {
        RESOURCETYPE_ANY = 0,
        RESOURCETYPE_DISK = 1,
        RESOURCETYPE_PRINT = 2,
        RESOURCETYPE_RESERVED = 8,
    }

    public enum RESOURCE_USAGE
    {
        RESOURCEUSAGE_CONNECTABLE = 1,
        RESOURCEUSAGE_CONTAINER = 2,
        RESOURCEUSAGE_NOLOCALDEVICE = 4,
        RESOURCEUSAGE_SIBLING = 8,
        RESOURCEUSAGE_ATTACHED = 16,
        RESOURCEUSAGE_ALL = (RESOURCEUSAGE_CONNECTABLE | RESOURCEUSAGE_CONTAINER | RESOURCEUSAGE_ATTACHED),
    }

    public enum RESOURCE_DISPLAYTYPE
    {
        RESOURCEDISPLAYTYPE_GENERIC = 0,
        RESOURCEDISPLAYTYPE_DOMAIN = 1,
        RESOURCEDISPLAYTYPE_SERVER = 2,
        RESOURCEDISPLAYTYPE_SHARE = 3,
        RESOURCEDISPLAYTYPE_FILE = 4,
        RESOURCEDISPLAYTYPE_GROUP = 5,
        RESOURCEDISPLAYTYPE_NETWORK = 6,
        RESOURCEDISPLAYTYPE_ROOT = 7,
        RESOURCEDISPLAYTYPE_SHAREADMIN = 8,
        RESOURCEDISPLAYTYPE_DIRECTORY = 9,
        RESOURCEDISPLAYTYPE_TREE = 10,
        RESOURCEDISPLAYTYPE_NDSCONTAINER = 11
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct NETRESOURCE
    {
        public RESOURCE_SCOPE dwScope;
        public RESOURCE_TYPE dwType;
        public RESOURCE_DISPLAYTYPE dwDisplayType;
        public RESOURCE_USAGE dwUsage;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpLocalName;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpRemoteName;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpComment;

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpProvider;
    }

    public class NetworkConnection
    {
        [DllImport("mpr.dll")]
        public static extern int WNetAddConnection2A(NETRESOURCE[] lpNetResource, string lpPassword, string lpUserName, int dwFlags);

        [DllImport("mpr.dll")]
        public static extern int WNetCancelConnection2A(string sharename, int dwFlags, int fForce);

        public static int Connect(string remotePath, string localPath, string username, string password)
        {
            NETRESOURCE[] share_driver = new NETRESOURCE[1];
            share_driver[0].dwScope = RESOURCE_SCOPE.RESOURCE_GLOBALNET;
            share_driver[0].dwType = RESOURCE_TYPE.RESOURCETYPE_DISK;
            share_driver[0].dwDisplayType = RESOURCE_DISPLAYTYPE.RESOURCEDISPLAYTYPE_SHARE;
            share_driver[0].dwUsage = RESOURCE_USAGE.RESOURCEUSAGE_CONNECTABLE;
            share_driver[0].lpLocalName = localPath;
            share_driver[0].lpRemoteName = remotePath;

            Disconnect(localPath);
            int ret = WNetAddConnection2A(share_driver, password, username, 1);

            return ret;
        }

        public static int Disconnect(string localpath)
        {
            return WNetCancelConnection2A(localpath, 1, 1);
        }
    }

應用代碼

 
//此處的用戶名admin和password 必須與上述新增的用戶名和密碼一致。
var status = NetworkConnection.Connect("\\\\192.168.0.26\\nasbak\\oracle", "X:", "admin", "password");
            if (status == (int)ERROR_ID.ERROR_SUCCESS)
            {
                try
                {
                    //業務邏輯處理，使用在程序中映射的本地路徑讀取即可

                }
                catch (Exception ex)
                {
                       //todo 異常記錄
                }
            }
            else
            {
                //返回狀態碼
            }
            NetworkConnection.Disconnect(localpath);    

如果以本地系統賬號進行啟動的話，返回1312錯誤碼（ERROR_NO_SUCH_LOGON_SESSION）。此錯誤碼字面意思應該沒有登錄狀態。