访问远程服务器上的共享文件夹

春季论证会逼近，地震数据体不断增加，硬盘空间吃紧，只能将一部分数据体放到187上来解决了。
由于抽取地震剖面的程序是在WEB Server中调用的，在Windows中访问187上的共享目录正常，但在程序中好像访问不到共享目录。只能在C#程序中来访问共享目录了，从网上找了一段代码改了改，很快就可以用了，只是没有进行异常处理。

程序中要用到Windows API的函数，需要定义一些枚举变量。

Windows API enum and struct#region Windows API enum and struct
    public enum ERROR_ID
    {
        ERROR_SUCCESS = 0,  // Success 
        ERROR_MORE_DATA = 234,
        ERROR_NO_BROWSER_SERVERS_FOUND = 6118,
        ERROR_INVALID_LEVEL = 124,
        ERROR_ACCESS_DENIED = 5,
        ERROR_INVALID_PARAMETER = 87,
        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
    }

    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;
    }

    #endregion 

两个方法就比较简单了，一个用来连接，一个用来关闭。

    /**//// <summary>
    /// 连接网络上的共享文件夹
    /// </summary>
    public class NetworkSharedFolder
    {

        [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);

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="remotePath"></param>
        /// <param name="localPath"></param>
        /// <param name="username"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        public static int Connect(string remotePath, string localPath, string username, string password)
        {
                NETRESOURCE[] share_driver = new NETRESOURCE[1];
                share_driver[0].dwType = RESOURCE_TYPE.RESOURCETYPE_DISK;
                share_driver[0].lpLocalName = localPath;
                share_driver[0].lpRemoteName = remotePath;

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

                return ret;
        }

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