尝试打开此文件时如何区分本地文件或远程文件？

Question

我有Winforms 应用程序读取文件（PCAP 文件）并通过网卡播放所有文件包。 现在我想添加从远程机器读取文件的选项，所以我使用的是从这个论坛的其他帖子中获取的这个类：

public class NetworkShareAccesser : IDisposable
    {
        private string _remoteUncName;
        private string _remoteComputerName;

        public string RemoteComputerName
        {
            get
            {
                return this._remoteComputerName;
            }
            set
            {
                this._remoteComputerName = value;
                this._remoteUncName = @"\\" + this._remoteComputerName;
            }
        }

        public string UserName
        {
            get;
            set;
        }
        public string Password
        {
            get;
            set;
        }

        #region Consts

        private const int RESOURCE_CONNECTED = 0x00000001;
        private const int RESOURCE_GLOBALNET = 0x00000002;
        private const int RESOURCE_REMEMBERED = 0x00000003;

        private const int RESOURCETYPE_ANY = 0x00000000;
        private const int RESOURCETYPE_DISK = 0x00000001;
        private const int RESOURCETYPE_PRINT = 0x00000002;

        private const int RESOURCEDISPLAYTYPE_GENERIC = 0x00000000;
        private const int RESOURCEDISPLAYTYPE_DOMAIN = 0x00000001;
        private const int RESOURCEDISPLAYTYPE_SERVER = 0x00000002;
        private const int RESOURCEDISPLAYTYPE_SHARE = 0x00000003;
        private const int RESOURCEDISPLAYTYPE_FILE = 0x00000004;
        private const int RESOURCEDISPLAYTYPE_GROUP = 0x00000005;

        private const int RESOURCEUSAGE_CONNECTABLE = 0x00000001;
        private const int RESOURCEUSAGE_CONTAINER = 0x00000002;


        private const int CONNECT_INTERACTIVE = 0x00000008;
        private const int CONNECT_PROMPT = 0x00000010;
        private const int CONNECT_REDIRECT = 0x00000080;
        private const int CONNECT_UPDATE_PROFILE = 0x00000001;
        private const int CONNECT_COMMANDLINE = 0x00000800;
        private const int CONNECT_CMD_SAVECRED = 0x00001000;

        private const int CONNECT_LOCALDRIVE = 0x00000100;

        #endregion

        #region Errors

        private const int NO_ERROR = 0;

        private const int ERROR_ACCESS_DENIED = 5;
        private const int ERROR_ALREADY_ASSIGNED = 85;
        private const int ERROR_BAD_DEVICE = 1200;
        private const int ERROR_BAD_NET_NAME = 67;
        private const int ERROR_BAD_PROVIDER = 1204;
        private const int ERROR_CANCELLED = 1223;
        private const int ERROR_EXTENDED_ERROR = 1208;
        private const int ERROR_INVALID_ADDRESS = 487;
        private const int ERROR_INVALID_PARAMETER = 87;
        private const int ERROR_INVALID_PASSWORD = 1216;
        private const int ERROR_MORE_DATA = 234;
        private const int ERROR_NO_MORE_ITEMS = 259;
        private const int ERROR_NO_NET_OR_BAD_PATH = 1203;
        private const int ERROR_NO_NETWORK = 1222;

        private const int ERROR_BAD_PROFILE = 1206;
        private const int ERROR_CANNOT_OPEN_PROFILE = 1205;
        private const int ERROR_DEVICE_IN_USE = 2404;
        private const int ERROR_NOT_CONNECTED = 2250;
        private const int ERROR_OPEN_FILES = 2401;

        #endregion

        #region PInvoke Signatures

        [DllImport("Mpr.dll")]
        private static extern int WNetUseConnection(
            IntPtr hwndOwner,
            NETRESOURCE lpNetResource,
            string lpPassword,
            string lpUserID,
            int dwFlags,
            string lpAccessName,
            string lpBufferSize,
            string lpResult
            );

        [DllImport("Mpr.dll")]
        private static extern int WNetCancelConnection2(
            string lpName,
            int dwFlags,
            bool fForce
            );

        [StructLayout(LayoutKind.Sequential)]
        private class NETRESOURCE
        {
            public int dwScope = 0;
            public int dwType = 0;
            public int dwDisplayType = 0;
            public int dwUsage = 0;
            public string lpLocalName = "";
            public string lpRemoteName = "";
            public string lpComment = "";
            public string lpProvider = "";
        }

        #endregion

        /// <summary>
        /// Creates a NetworkShareAccesser for the given computer name. The user will be promted to enter credentials
        /// </summary>
        /// <param name="remoteComputerName"></param>
        /// <returns></returns>
        public static NetworkShareAccesser Access(string remoteComputerName)
        {
            return new NetworkShareAccesser(remoteComputerName);
        }

        /// <summary>
        /// Creates a NetworkShareAccesser for the given computer name using the given domain/computer name, username and password
        /// </summary>
        /// <param name="remoteComputerName"></param>
        /// <param name="domainOrComuterName"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        public static NetworkShareAccesser Access(string remoteComputerName, string domainOrComuterName, string userName, string password)
        {
            return new NetworkShareAccesser(remoteComputerName,
                                            domainOrComuterName + @"\" + userName,
                                            password);
        }

        /// <summary>
        /// Creates a NetworkShareAccesser for the given computer name using the given username (format: domainOrComputername\Username) and password
        /// </summary>
        /// <param name="remoteComputerName"></param>
        /// <param name="userName"></param>
        /// <param name="password"></param>
        public static NetworkShareAccesser Access(string remoteComputerName, string userName, string password)
        {
            return new NetworkShareAccesser(remoteComputerName,
                                            userName,
                                            password);
        }

        private NetworkShareAccesser(string remoteComputerName)
        {
            RemoteComputerName = remoteComputerName;

            this.ConnectToShare(this._remoteUncName, null, null, true);
        }

        private NetworkShareAccesser(string remoteComputerName, string userName, string password)
        {
            RemoteComputerName = remoteComputerName;
            UserName = userName;
            Password = password;

            this.ConnectToShare(this._remoteUncName, this.UserName, this.Password, false);
        }

        private void ConnectToShare(string remoteUnc, string username, string password, bool promptUser)
        {
            NETRESOURCE nr = new NETRESOURCE
            {
                dwType = RESOURCETYPE_DISK,
                lpRemoteName = remoteUnc
            };

            int result;
            if (promptUser)
            {
                result = WNetUseConnection(IntPtr.Zero, nr, "", "", CONNECT_INTERACTIVE | CONNECT_PROMPT, null, null, null);
            }
            else
            {
                result = WNetUseConnection(IntPtr.Zero, nr, password, username, 0, null, null, null);
            }

            if (result != NO_ERROR)
            {
                throw new Win32Exception(result);
            }
        }

        private void DisconnectFromShare(string remoteUnc)
        {
            int result = WNetCancelConnection2(remoteUnc, CONNECT_UPDATE_PROFILE, false);
            if (result != NO_ERROR)
            {
                throw new Win32Exception(result);
            }
        }

        /// <summary>
        /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
        /// </summary>
        /// <filterpriority>2</filterpriority>
        public void Dispose()
        {
            this.DisconnectFromShare(this._remoteUncName);
        }
    }

我就是这样使用这个类的：

using (NetworkShareAccesser.Access("1.1.1.1", "domain", "user", "Rel7.xPass!"))
{
    //File....
}

我不想在本地复制这些文件，但要远程打开这些文件

所以我的问题是当我想使用这个文件时如何区分本地文件或远程文件？

在我的应用程序中，我有ListBox，其中包含我的所有文件以及其中一些本地文件。 我可以仅使用此命令示例将此文件导入我的ListBox，然后尝试在没有此using (NetworkShareAccesser.Access("1.1.1.1", "domain", "user", "Rel7.xPass!")) 的情况下调用此文件吗？

Answer 1

您可以将对象添加到列表框中。只需确保重写 toString() 方法以显示适当的值。

你可以有这样的对象

public class MyObj
{
    public string Value { get; set; }
    public bool IsRemote { get; set; }

    public override string ToString() 
    {     
          return Value;
    }
}

然后在添加前设置IsRemote。