读取远程文件

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.IO;
using System.Net;
using System.Windows.Forms;


namespace LogOperator.Class
{  
    #region lpNetResouce结构体

    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, //枚举连接的资源
        RESOURCE_GLOBALNET = 2, //枚举所有资源
        RESOURCE_REMEMBERED = 3,//枚举永久性连接
        RESOURCE_RECENT = 4,
        RESOURCE_CONTEXT = 5
    }

    public enum RESOURCE_TYPE
    {
        RESOURCETYPE_ANY = 0,//枚举所有资源
        RESOURCETYPE_DISK = 1,//枚举磁盘
        RESOURCETYPE_PRINT = 2,//枚举打印机
        RESOURCETYPE_RESERVED = 8,
    }

    public enum RESOURCE_USAGE
    {
        RESOURCEUSAGE_CONNECTABLE = 1,//可同这个资源连接
        RESOURCEUSAGE_CONTAINER = 2,//这个资源包含了可以枚举的额外资源
        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)]//按顺序布局结构体成员
    public struct NETRESOURCE
    {
        public RESOURCE_SCOPE dwScope; //枚举资源
        public RESOURCE_TYPE dwType;   //指定网络资源类型
        public RESOURCE_DISPLAYTYPE dwDisplayType; //带有前缀RESOURCEDISPLAYTYPE的一个常数，对资源的类型进行了定义（在网络浏览器中如何显示）
        public RESOURCE_USAGE dwUsage;//(可同这个资源连接 / 这个资源包含了可以枚举的额外资源)

      
        [MarshalAs(UnmanagedType.LPStr)]//指定下面参数（lpLocalName）的属性
        public string lpLocalName;//指定本地设备

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpRemoteName;//指定远程网络名

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpComment;//由网络供应商设置

        [MarshalAs(UnmanagedType.LPStr)]
        public string lpProvider;//指定网络资源供应商，为空表示供应商未知  

        public override String ToString()
        {
            String str = "LocalName: " + lpLocalName + " RemoteName: " + lpRemoteName
                + " Comment: " + lpComment + " lpProvider: " + lpProvider;
            return (str);
        }

    }

    #endregion lpNetResouce结构体

    /// <summary>
    /// 该类提供远程连接
    /// </summary>
    public class NetFile
    {

        public NetFile()
        {
        }

        [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 passward)
        {
            NETRESOURCE[] share_driver = new NETRESOURCE[1];
            share_driver[0].dwScope = RESOURCE_SCOPE.RESOURCE_GLOBALNET;//枚举所有资源
            share_driver[0].dwType = RESOURCE_TYPE.RESOURCETYPE_ANY;//枚举所有
            share_driver[0].dwDisplayType = RESOURCE_DISPLAYTYPE.RESOURCEDISPLAYTYPE_SHARE;//枚举共享
            share_driver[0].dwUsage = RESOURCE_USAGE.RESOURCEUSAGE_CONNECTABLE;//可以连接
            share_driver[0].lpLocalName = localPath;
            share_driver[0].lpRemoteName = remotePath;

            Disconnect(localPath);
            int ret;
            if (userName == "" || passward == "")
            {
                ret = WNetAddConnection2A(share_driver, null, null, 1);
            }
            else
            {
                ret = WNetAddConnection2A(share_driver, userName, passward, 1);
            }
            return ret;
           
        }

        /// <summary>
        /// 结束一个网络连接
        ///
        /// </summary>
        /// <param name="localpath"></param>
        /// <returns></returns>
        public static int Disconnect(string localpath)
        {
            //参数依次是：已连接资源的远程名称或本地名称；
            //Long，设为零或CONNECT_UPDATE_PROFILE。如为零，而且建立的是永久性连接，则在windows下次重新启动时仍会重新连接
            //Long，如为TRUE，表示强制断开连接（即使连接的资源上正有打开的文件或作业）
            return WNetCancelConnection2A(localpath, 1, 1);
        }

        public static void TestNetWorkConnection(Form fm,string Remotepath,string userName,string pwd,string localPath)
        {
            Form ff = fm;
            int status = Connect(Remotepath,localPath, userName, pwd);
            if (status == (int)ERROR_ID.ERROR_SUCCESS)
            {
                IOHelper.ImportMethod(fm.ListView1);
            }
            else
            {
                MessageBox.Show("连接失败：代号--" + status + "  ");
            }
           Disconnect(localPath);
        }

       
    }
}