其实主要是使用API，先在本地映射远程计算机上的文件夹，然后去拷贝，原理很简单，直接贴代码吧。
#region 公有属性 private bool lf_SaveCredentials = false; /// <summary> /// 是否在连接上保存身份 /// </summary> public bool SaveCredentials { get { return (lf_SaveCredentials); } set { lf_SaveCredentials = value; } } private bool lf_Persistent = false; /// <summary> /// 重启的时候是否重新连接 /// </summary> public bool Persistent { get { return (lf_Persistent); } set { lf_Persistent = value; } } private bool lf_Force = false; /// <summary> /// 如果存在当前映射，是否强制将原有映射改编成你需要的映射 /// or force disconnection if network path is not responding... /// </summary> public bool Force { get { return (lf_Force); } set { lf_Force = value; } } private bool ls_PromptForCredentials = false; /// <summary> /// 映射时是否立刻使用身份认证 /// </summary> public bool PromptForCredentials { get { return (ls_PromptForCredentials); } set { ls_PromptForCredentials = value; } } private bool lf_FindNextFreeDrive = false; /// <summary> /// 是否自动去找本地的空闲驱动器号 /// </summary> public bool FindNextFreeDrive { get { return (lf_FindNextFreeDrive); } set { lf_FindNextFreeDrive = value; } } private string ls_LocalDrive = null; /// <summary> /// 用来映射的本地驱动器 /// </summary> public string LocalDrive { get { return (ls_LocalDrive); } set { if (value == null || value.Length == 0) { ls_LocalDrive = null; } else { ls_LocalDrive = value.Substring(0, 1) + ":"; } } } private string ls_ShareName = ""; /// <summary> /// 远程计算机的共享文件夹，例如//Computer/C$' /// </summary> public string ShareName { get { return (ls_ShareName); } set { ls_ShareName = value; } } /// <summary> /// 当前已经映射的驱动器号 /// </summary> public string[] MappedDrives { get { System.Collections.ArrayList oDrives = new System.Collections.ArrayList(); foreach (string sDrive in System.IO.Directory.GetLogicalDrives()) { if (PathIsNetworkPath(sDrive)) { oDrives.Add(sDrive); } } return ((string[])oDrives.ToArray(typeof(string))); } } #endregion #region 公共方法 /// <summary> /// 映射网络驱动器 /// </summary> public void MapDrive() { z_MapDrive(null, null); } /// <summary> /// 映射网络驱动器 (身份认证使用用户名密码方式) /// </summary> /// <param name="Username">远程计算机的用户名</param> /// <param name="Password">远程计算机的密码</param> public void MapDrive(string Username, string Password) { z_MapDrive(Username, Password); } /// <summary> /// 使用公共属性来映射网络驱动器 /// </summary> /// <param name="LocalDrive">网络驱动器号</param> /// <param name="ShareName">远程的共享文件夹(例如. '//Computer/Share')</param> /// <param name="Force">是否强制映射</param> public void MapDrive(string LocalDrive, string ShareName, bool Force) { ls_LocalDrive = LocalDrive; ls_ShareName = ShareName; lf_Force = Force; z_MapDrive(null, null); } /// <summary> /// 使用公共属性来映射网络驱动器 /// </summary> /// <param name="LocalDrive">网络驱动器号</param> /// <param name="Force">是否强制映射</param> public void MapDrive(string LocalDrive, bool Force) { ls_LocalDrive = LocalDrive; ls_ShareName = ShareName; lf_Force = Force; z_MapDrive(null, null); } /// <summary> /// 断开映射 /// </summary> public void UnMapDrive() { z_UnMapDrive(); } /// <summary> /// 断开映射(对于特定的映射) /// </summary> public void UnMapDrive(string LocalDrive) { ls_LocalDrive = LocalDrive; z_UnMapDrive(); } /// <summary> /// 断开映射(对于特定的映射) /// </summary> public void UnMapDrive(string LocalDrive, bool Force) { ls_LocalDrive = LocalDrive; lf_Force = Force; z_UnMapDrive(); } /// <summary> /// 恢复映射 /// </summary> public void RestoreDrives() { //request all drives be restored z_RestoreDrive(null); } /// <summary> /// 恢复映射 /// </summary> public void RestoreDrive(string LocalDrive) { //request drive be reinstalled z_RestoreDrive(LocalDrive); } /// <summary> /// 映射网络驱动器的时候，显示窗口 /// </summary> public void ShowConnectDialog() { z_DisplayDialog(IntPtr.Zero, 1); } /// <summary> /// 映射网络驱动器的时候，显示窗口 /// </summary> /// <param name="ParentForm">要在哪个母窗体下显示</param> public void ShowConnectDialog(IntPtr ParentFormHandle) { z_DisplayDialog(ParentFormHandle, 1); } /// <summary> /// 断开网络驱动器的时候，显示窗口 /// </summary> public void ShowDisconnectDialog() { z_DisplayDialog(IntPtr.Zero, 2); } /// <summary> /// 断开网络驱动器的时候，显示窗口 /// </summary> /// <param name="ParentForm">要在哪个母窗体下显示</param> public void ShowDisconnectDialog(IntPtr ParentFormHandle) { z_DisplayDialog(ParentFormHandle, 2); } /// <summary> /// 得到网络驱动器的共享文件夹，例如. //computer/share /// </summary> /// <param name="DriveName">网络驱动器 (例如. 'X:')</param> /// <returns></returns> public string GetMappedShareName(string LocalDrive) { //collect and clean the passed LocalDrive param if (LocalDrive == null || LocalDrive.Length == 0) throw new Exception("Invalid 'LocalDrive' passed, 'LocalDrive' parameter cannot be 'null'"); LocalDrive = LocalDrive.Substring(0, 1); //call api to collect LocalDrive's share name int i = 255; byte[] bSharename = new byte[i]; int iCallStatus = WNetGetConnection(LocalDrive + ":", bSharename, ref i); switch (iCallStatus) { case 1201: throw new Exception("Cannot collect 'ShareName', Passed 'DriveName' is valid but currently not connected (API: ERROR_CONNECTION_UNAVAIL)"); case 1208: throw new Exception("API function 'WNetGetConnection' failed (API: ERROR_EXTENDED_ERROR:" + iCallStatus.ToString() + ")"); case 1203: case 1222: throw new Exception("Cannot collect 'ShareName', No network connection found (API: ERROR_NO_NETWORK / ERROR_NO_NET_OR_BAD_PATH)"); case 2250: throw new Exception("Invalid 'DriveName' passed, Drive is not a network drive (API: ERROR_NOT_CONNECTED)"); case 1200: throw new Exception("Invalid / Malfored 'Drive Name' passed to 'GetShareName' function (API: ERROR_BAD_DEVICE)"); case 234: throw new Exception("Invalid 'Buffer' length, buffer is too small (API: ERROR_MORE_DATA)"); } return (System.Text.Encoding.GetEncoding(1252).GetString(bSharename, 0, i).TrimEnd((char)0)); } /// <summary> /// 是否是网络驱动器 /// </summary> /// <param name="DriveName">驱动器号 (例如. 'X:')</param> /// <returns></returns> public bool IsNetworkDrive(string LocalDrive) { //collect and clean the passed LocalDrive param if (LocalDrive == null || LocalDrive.Trim().Length == 0) throw new Exception("Invalid 'LocalDrive' passed, 'DriveName' cannot be 'empty'"); LocalDrive = LocalDrive.Substring(0, 1); //return status of drive type return (IsNetworkDrive(LocalDrive + ":")); } #endregion #region API [DllImport("mpr.dll")] private static extern int WNetAddConnection2A(ref structNetResource NetResStruct, string Password, string Username, int Flags); [DllImport("mpr.dll")] private static extern int WNetCancelConnection2A(string Name, int Flags, int Force); [DllImport("mpr.dll")] private static extern int WNetConnectionDialog(int hWnd, int Type); [DllImport("mpr.dll")] private static extern int WNetDisconnectDialog(int hWnd, int Type); [DllImport("mpr.dll", CharSet = CharSet.Unicode)] private static extern int WNetRestoreConnectionW(int hWnd, string LocalDrive); [DllImport("mpr.dll")] private static extern int WNetGetConnection(string LocalDrive, byte[] RemoteName, ref int BufferLength); [DllImport("shlwapi.dll")] private static extern bool PathIsNetworkPath(string LocalDrive); [DllImport("kerneldll")] private static extern int GetDriveType(string LocalDrive); [StructLayout(LayoutKind.Sequential)] private struct structNetResource { public int Scope; public int Type; public int DisplayType; public int Usage; public string LocalDrive; public string RemoteName; public string Comment; public string Provider; } //Standard private const int RESOURCETYPE_DISK = 0x1; private const int CONNECT_INTERACTIVE = 0x00000008; private const int CONNECT_PROMPT = 0x00000010; private const int CONNECT_UPDATE_PROFILE = 0x00000001; //IE4+ private const int CONNECT_REDIRECT = 0x00000080; //NT5 only private const int CONNECT_COMMANDLINE = 0x00000800; private const int CONNECT_CMD_SAVECRED = 0x00001000; #endregion #region 私有方法 /// <summary> /// 映射网络驱动器 /// </summary> /// <param name="Username"></param> /// <param name="Password"></param> private void z_MapDrive(string Username, string Password) { //if drive property is set to auto select, collect next free drive if (lf_FindNextFreeDrive) { ls_LocalDrive = z_NextFreeDrive(); if (ls_LocalDrive == null || ls_LocalDrive.Length == 0) { throw new Exception("Could not find valid free drive name"); } } //create struct data to pass to the api function structNetResource stNetRes = new structNetResource(); stNetRes.Scope = 2; stNetRes.Type = RESOURCETYPE_DISK; stNetRes.DisplayType = 3; stNetRes.Usage = 1; stNetRes.RemoteName = ls_ShareName; stNetRes.LocalDrive = ls_LocalDrive; //prepare params int iFlags = 0; if (lf_SaveCredentials) { iFlags += CONNECT_CMD_SAVECRED; } if (lf_Persistent) { iFlags += CONNECT_UPDATE_PROFILE; } if (ls_PromptForCredentials) { iFlags += CONNECT_INTERACTIVE + CONNECT_PROMPT; } if (Username != null && Username.Length == 0) { Username = null; } if (Password != null && Password.Length == 0) { Password = null; } //if force, unmap ready for new connection if (lf_Force) { try { z_UnMapDrive(); } catch { } } //call and return int i = WNetAddConnection2A(ref stNetRes, Password, Username, iFlags); if (i > 0) { throw new System.ComponentModel.Win32Exception(i); } } /// <summary> /// 断开网络驱动器 /// </summary> private void z_UnMapDrive() { //prep vars and call unmap int iFlags = 0; int iRet = 0; if (lf_Persistent) { iFlags += CONNECT_UPDATE_PROFILE; } if (ls_LocalDrive == null) { //unmap use connection, passing the share name, as local drive iRet = WNetCancelConnection2A(ls_ShareName, iFlags, Convert.ToInt32(lf_Force)); } else { //unmap drive iRet = WNetCancelConnection2A(ls_LocalDrive, iFlags, Convert.ToInt32(lf_Force)); } //if errors, throw exception if (iRet > 0) { throw new System.ComponentModel.Win32Exception(iRet); } } /// <summary> /// 恢复网络驱动器 /// </summary> /// <param name="DriveName"></param> private void z_RestoreDrive(string DriveName) { //call restore and return int i = WNetRestoreConnectionW(0, DriveName); if (i > 0) { throw new System.ComponentModel.Win32Exception(i); } } /// <summary> /// 显示窗口 /// </summary> /// <param name="WndHandle"></param> /// <param name="DialogToShow"></param> private void z_DisplayDialog(IntPtr WndHandle, int DialogToShow) { int i = -1; int iHandle = 0; //get parent handle if (WndHandle != IntPtr.Zero) { iHandle = WndHandle.ToInt32(); } //chose dialog to show bassed on if (DialogToShow == 1) { i = WNetConnectionDialog(iHandle, RESOURCETYPE_DISK); } else if (DialogToShow == 2) { i = WNetDisconnectDialog(iHandle, RESOURCETYPE_DISK); } if (i > 0) { throw new System.ComponentModel.Win32Exception(i); } } /// <summary> /// 下一个可用的网络驱动器号 /// </summary> /// <returns></returns> private string z_NextFreeDrive() { //loop from c to z and check that drive is free string sRet = null; for (int i = 67; i <= 90; i++) { if (GetDriveType(((char)i).ToString() + ":") == 1) { sRet = ((char)i).ToString() + ":"; break; } } //return selected drive return (sRet); } #endregion