新手请教:C# 实现访问服务器 现在想用C#来实现访问服务器,请问各位大虾们有没有这方面的资料或例程,请发给小弟学习学习?感激不尽~~邮箱:[email protected] 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 一、调用Net use命令 // 使用方法: //if (Connect("192.168.1.48", "用户名", "密码")) //{ // File.Copy(@"\\192.168.1.48\共享目录\test.txt", @"e:\\test.txt", true); //} public bool Connect(string remoteHost, string userName, string passWord) { bool Flag = true; Process proc = new Process(); proc.StartInfo.FileName = "cmd.exe"; proc.StartInfo.UseShellExecute = false; proc.StartInfo.RedirectStandardInput = true; proc.StartInfo.RedirectStandardOutput = true; proc.StartInfo.RedirectStandardError = true; proc.StartInfo.CreateNoWindow = true; try { proc.Start(); string command = @"net use \\" + remoteHost + " " + passWord + " " + " /user:" + userName + ">NUL"; proc.StandardInput.WriteLine(command); command = "exit"; proc.StandardInput.WriteLine(command); while (proc.HasExited == false) { proc.WaitForExit(1000); } string errormsg = proc.StandardError.ReadToEnd(); if (errormsg != "") Flag = false; proc.StandardError.Close(); } catch (Exception ex) { Flag = false; } finally { proc.Close(); proc.Dispose(); } return Flag; }二、调用WNetAddConnection2、WNetAddConnection3或者NetUseAdd函数,进行磁盘映射。using System;using System.Collections.Generic;using System.Text; using System.Runtime.InteropServices;namespace WindowsApplication1{ public class MyMap { [DllImport("mpr.dll", EntryPoint = "WNetAddConnection2")] public static extern uint WNetAddConnection2( [In] NETRESOURCE lpNetResource, string lpPassword, string lpUsername, uint dwFlags); [DllImport("Mpr.dll")] public static extern uint WNetCancelConnection2( string lpName, uint dwFlags, bool fForce); [StructLayout(LayoutKind.Sequential)] public class NETRESOURCE { public int dwScope; public int dwType; public int dwDisplayType; public int dwUsage; public string LocalName; public string RemoteName; public string Comment; public string Provider; } // remoteNetworkPath format: @"\\192.168.1.48\sharefolder" // localDriveName format: @"E:" public static bool CreateMap(string userName, string password, string remoteNetworkPath, string localDriveName) { NETRESOURCE myNetResource = new NETRESOURCE(); myNetResource.dwScope = 2; //2:RESOURCE_GLOBALNET myNetResource.dwType = 1; //1:RESOURCETYPE_ANY myNetResource.dwDisplayType = 3; //3:RESOURCEDISPLAYTYPE_GENERIC myNetResource.dwUsage = 1; //1: RESOURCEUSAGE_CONNECTABLE myNetResource.LocalName = localDriveName; myNetResource.RemoteName = remoteNetworkPath; myNetResource.Provider = null; uint nret = WNetAddConnection2(myNetResource, password, userName, 0); if (nret == 0) return true; else return false; } // localDriveName format: @"E:" public static bool DeleteMap(string localDriveName) { uint nret = WNetCancelConnection2(localDriveName, 1, true); if (nret == 0) return true; else return false; } public void test() { // 注意: // remote、local、username的格式一定要正确,否则可能出现错误 string remote = @"\\192.168.1.48\generals"; string local = @"P:"; string username = @"Domain\UserName"; string password = @"Password"; bool ret = MyMap.CreateMap(username, password, remote, local); if (ret) { //do what you want: // ... //File.Copy("q:\\test.htm", "c:\\test.htm"); MyMap.DeleteMap(local); } } }}三、使用WebClient类由于WebClient类可以上传下载文件,并且支持以http:、https:和file:开头的URI,所以可以用WebClient类来传输文件。添加System.Net命名空间后使用如下代码下载文件: private void Test1() { try { WebClient client = new WebClient(); NetworkCredential cred = new NetworkCredential("username", "password", "172.16.0.222"); client.Credentials = cred; client.DownloadFile("file://172.16.0.222/test/111.txt", "111.txt"); } catch (Exception ex) { // 如果网络很慢,而文件又很大,这时可能有超时异常(Time out)。 } } public void Test2() { try { WebClient client = new WebClient(); NetworkCredential cred = new NetworkCredential("username", "password", "domain"); client.Credentials = cred; client.DownloadFile("file://172.16.0.222/test/111.txt", "111.txt"); } catch (Exception ex) { // 如果网络很慢,而文件又很大,这时可能有超时异常(Time out)。 } }类似的还可以试试WebRequest、FileWebRequest等: WebRequest req = WebRequest.Create("file://138.12.12.14/generals/test.htm"); NetworkCredential cred = new NetworkCredential("username", "password", "IP"); req.Credentials = cred; WebResponse response = req.GetResponse(); Stream strm = response.GetResponseStream(); StreamReader r = new StreamReader(strm); ... ... 四、角色模拟using System;using System.Collections.Generic;using System.Text;using System.Runtime.InteropServices;using System.Security.Principal;using System.IO;namespace Test{ public class Test { // logon types const int LOGON32_LOGON_INTERACTIVE = 2; const int LOGON32_LOGON_NETWORK = 3; const int LOGON32_LOGON_NEW_CREDENTIALS = 9; // logon providers const int LOGON32_PROVIDER_DEFAULT = 0; const int LOGON32_PROVIDER_WINNT50 = 3; const int LOGON32_PROVIDER_WINNT40 = 2; const int LOGON32_PROVIDER_WINNT35 = 1; [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int LogonUser(String lpszUserName, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int DuplicateToken(IntPtr hToken, int impersonationLevel, ref IntPtr hNewToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern bool RevertToSelf(); [DllImport("kernel32.dll", CharSet = CharSet.Auto)] public static extern bool CloseHandle(IntPtr handle); private WindowsImpersonationContext impersonationContext; public bool impersonateValidUser(String userName, String domain, String password) { WindowsIdentity tempWindowsIdentity; IntPtr token = IntPtr.Zero; IntPtr tokenDuplicate = IntPtr.Zero; if (RevertToSelf()) { // 这里使用LOGON32_LOGON_NEW_CREDENTIALS来访问远程资源。 // 如果要(通过模拟用户获得权限)实现服务器程序,访问本地授权数据库可 // 以用LOGON32_LOGON_INTERACTIVE if (LogonUser(userName, domain, password, LOGON32_LOGON_NEW_CREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref token) != 0) { if (DuplicateToken(token, 2, ref tokenDuplicate) != 0) { tempWindowsIdentity = new WindowsIdentity(tokenDuplicate); impersonationContext = tempWindowsIdentity.Impersonate(); if (impersonationContext != null) { System.AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal); IPrincipal pr = System.Threading.Thread.CurrentPrincipal; IIdentity id = pr.Identity; CloseHandle(token); CloseHandle(tokenDuplicate); return true; } } } } if (token != IntPtr.Zero) CloseHandle(token); if (tokenDuplicate != IntPtr.Zero) CloseHandle(tokenDuplicate); return false; } public void undoImpersonation() { impersonationContext.Undo(); } public void TestFunc() { bool isImpersonated = false; try { if (impersonateValidUser("UserName", "Domain", "Password")) { isImpersonated = true; //do what you want now, as the special user // ... File.Copy(@"\\192.168.1.48\generals\now.htm", "c:\\now.htm", true); } } finally { if (isImpersonated) undoImpersonation(); } } }}五、比较方法一通过调用Shell命令Net Use实现,有点笨拙。方法二和方法一有些相似之处。映射远程资源,然后访问。方法三由于会有超时异常出现,所以在网络速度快、传输小文件时是可以的。方法四通过身份模拟实现远程资源访问。一些服务器进程就是通过这种方式运行的。这种方法也是我的最爱。六、要注意的地方关于这几种方法,google后都可以找到一些文章。但是等到自己实际测试时,有时会出现各种小错误,这些错误基本来源于两方面:1、函数的参数选择有问题,和自己的环境不相符。比如 public static extern int LogonUser(String lpszUserName, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);中的dwLogonType,要访问远程资源就要用LOGON32_LOGON_NEW_CREDENTIALS,要模拟本机用户就要用LOGON32_LOGON_INTERACTIVE。2、函数的参数格式有问题。 a、比如 public static extern int LogonUser(String lpszUserName, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken); 中的lpszUserName、lpszDomain、lpszPassword就要写清楚。 我就在这遇到过问题,第一次测试时,远程服务器就是一台独立的文件服务器,这是我的调用方式: LogonUser("myname", "192.168.1.48", "password", LOGON32_LOGON_NEW_CREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref token); 第二次测试时,远程服务器是域MyDomain中的一个成员服务器,提供文件服务。这时代码就应该是: LogonUser("myname", "MyDomain", "password", LOGON32_LOGON_NEW_CREDENTIALS, LOGON32_PROVIDER_DEFAULT, ref token); 注意,代码中是MyDomain而不是IP地址。 b、再如: 参考上面代码 string remote = @"\\192.168.1.48\generals"; string local = @"P:"; string username = @"Domain\UserName"; string password = @"Password"; 如果@"\\192.168.1.48\generals"变成@"\\192.168.1.48\generals\”就会出错; 如果是域中的用户,那么把@"Domain\UserName"变成@"UserName"就会出错。 新手...关于picture添加和读取图片的问题 动态调用webservice DatagridView多表头 winFrom C#创建完数据库不能立即连接,好像非要延时才行 项目寻求合作,有能力现金交易 请教大家一个禁止改变窗体大小的问题,问题比较菜,请多指教 在windows应用程序中如何实现客户端与服务器之间传送信息,非常急 有关委托与函数指针的问题 数组问题 (高分求助)byte[] 转化为结构时候出错 数据写入DataGridView的同时写入txtBox里面去? 新手求大大指导 C#调用C++ 的DLL 有问题啊~!
一、调用Net use命令 // 使用方法:
//if (Connect("192.168.1.48", "用户名", "密码"))
//{
// File.Copy(@"\\192.168.1.48\共享目录\test.txt", @"e:\\test.txt", true);
//}
public bool Connect(string remoteHost, string userName, string passWord)
{
bool Flag = true;
Process proc = new Process();
proc.StartInfo.FileName = "cmd.exe";
proc.StartInfo.UseShellExecute = false;
proc.StartInfo.RedirectStandardInput = true;
proc.StartInfo.RedirectStandardOutput = true;
proc.StartInfo.RedirectStandardError = true;
proc.StartInfo.CreateNoWindow = true;
try
{
proc.Start();
string command = @"net use \\" + remoteHost + " " + passWord + " " + " /user:" + userName + ">NUL";
proc.StandardInput.WriteLine(command);
command = "exit";
proc.StandardInput.WriteLine(command);
while (proc.HasExited == false)
{
proc.WaitForExit(1000);
}
string errormsg = proc.StandardError.ReadToEnd();
if (errormsg != "")
Flag = false;
proc.StandardError.Close();
}
catch (Exception ex)
{
Flag = false;
}
finally
{
proc.Close();
proc.Dispose();
}
return Flag;
}二、调用WNetAddConnection2、WNetAddConnection3或者NetUseAdd函数,进行磁盘映射。using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;namespace WindowsApplication1
{
public class MyMap
{
[DllImport("mpr.dll", EntryPoint = "WNetAddConnection2")]
public static extern uint WNetAddConnection2(
[In] NETRESOURCE lpNetResource,
string lpPassword,
string lpUsername,
uint dwFlags);
[DllImport("Mpr.dll")]
public static extern uint WNetCancelConnection2(
string lpName,
uint dwFlags,
bool fForce);
[StructLayout(LayoutKind.Sequential)]
public class NETRESOURCE
{
public int dwScope;
public int dwType;
public int dwDisplayType;
public int dwUsage;
public string LocalName;
public string RemoteName;
public string Comment;
public string Provider;
} // remoteNetworkPath format: @"\\192.168.1.48\sharefolder"
// localDriveName format: @"E:"
public static bool CreateMap(string userName, string password, string remoteNetworkPath, string localDriveName)
{
NETRESOURCE myNetResource = new NETRESOURCE();
myNetResource.dwScope = 2; //2:RESOURCE_GLOBALNET
myNetResource.dwType = 1; //1:RESOURCETYPE_ANY
myNetResource.dwDisplayType = 3; //3:RESOURCEDISPLAYTYPE_GENERIC
myNetResource.dwUsage = 1; //1: RESOURCEUSAGE_CONNECTABLE
myNetResource.LocalName = localDriveName;
myNetResource.RemoteName = remoteNetworkPath;
myNetResource.Provider = null; uint nret = WNetAddConnection2(myNetResource, password, userName, 0); if (nret == 0)
return true;
else
return false;
} // localDriveName format: @"E:"
public static bool DeleteMap(string localDriveName)
{
uint nret = WNetCancelConnection2(localDriveName, 1, true); if (nret == 0)
return true;
else
return false;
} public void test()
{
// 注意:
// remote、local、username的格式一定要正确,否则可能出现错误
string remote = @"\\192.168.1.48\generals";
string local = @"P:";
string username = @"Domain\UserName";
string password = @"Password";
bool ret = MyMap.CreateMap(username, password, remote, local);
if (ret)
{
//do what you want:
// ...
//File.Copy("q:\\test.htm", "c:\\test.htm"); MyMap.DeleteMap(local);
}
}
}
}三、使用WebClient类由于WebClient类可以上传下载文件,并且支持以http:、https:和file:开头的URI,所以可以用WebClient类来传输文件。
添加System.Net命名空间后使用如下代码下载文件:
private void Test1()
{
try
{
WebClient client = new WebClient();
NetworkCredential cred = new NetworkCredential("username", "password", "172.16.0.222");
client.Credentials = cred;
client.DownloadFile("file://172.16.0.222/test/111.txt", "111.txt");
}
catch (Exception ex)
{
// 如果网络很慢,而文件又很大,这时可能有超时异常(Time out)。
}
} public void Test2()
{
try
{
WebClient client = new WebClient();
NetworkCredential cred = new NetworkCredential("username", "password", "domain");
client.Credentials = cred;
client.DownloadFile("file://172.16.0.222/test/111.txt", "111.txt");
}
catch (Exception ex)
{
// 如果网络很慢,而文件又很大,这时可能有超时异常(Time out)。
}
}类似的还可以试试WebRequest、FileWebRequest等: WebRequest req = WebRequest.Create("file://138.12.12.14/generals/test.htm");
NetworkCredential cred = new NetworkCredential("username", "password", "IP");
req.Credentials = cred;
WebResponse response = req.GetResponse();
Stream strm = response.GetResponseStream();
StreamReader r = new StreamReader(strm);
... ...
四、角色模拟using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.IO;namespace Test
{
public class Test
{
// logon types
const int LOGON32_LOGON_INTERACTIVE = 2;
const int LOGON32_LOGON_NETWORK = 3;
const int LOGON32_LOGON_NEW_CREDENTIALS = 9;
// logon providers
const int LOGON32_PROVIDER_DEFAULT = 0;
const int LOGON32_PROVIDER_WINNT50 = 3;
const int LOGON32_PROVIDER_WINNT40 = 2;
const int LOGON32_PROVIDER_WINNT35 = 1; [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int LogonUser(String lpszUserName,
String lpszDomain,
String lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int DuplicateToken(IntPtr hToken,
int impersonationLevel,
ref IntPtr hNewToken); [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool RevertToSelf(); [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
public static extern bool CloseHandle(IntPtr handle); private WindowsImpersonationContext impersonationContext; public bool impersonateValidUser(String userName, String domain, String password)
{
WindowsIdentity tempWindowsIdentity;
IntPtr token = IntPtr.Zero;
IntPtr tokenDuplicate = IntPtr.Zero; if (RevertToSelf())
{
// 这里使用LOGON32_LOGON_NEW_CREDENTIALS来访问远程资源。
// 如果要(通过模拟用户获得权限)实现服务器程序,访问本地授权数据库可
// 以用LOGON32_LOGON_INTERACTIVE
if (LogonUser(userName, domain, password, LOGON32_LOGON_NEW_CREDENTIALS,
LOGON32_PROVIDER_DEFAULT, ref token) != 0)
{
if (DuplicateToken(token, 2, ref tokenDuplicate) != 0)
{
tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
impersonationContext = tempWindowsIdentity.Impersonate();
if (impersonationContext != null)
{
System.AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
IPrincipal pr = System.Threading.Thread.CurrentPrincipal;
IIdentity id = pr.Identity;
CloseHandle(token);
CloseHandle(tokenDuplicate);
return true;
}
}
}
} if (token != IntPtr.Zero)
CloseHandle(token); if (tokenDuplicate != IntPtr.Zero)
CloseHandle(tokenDuplicate); return false;
} public void undoImpersonation()
{
impersonationContext.Undo();
} public void TestFunc()
{
bool isImpersonated = false;
try
{
if (impersonateValidUser("UserName", "Domain", "Password"))
{
isImpersonated = true;
//do what you want now, as the special user
// ...
File.Copy(@"\\192.168.1.48\generals\now.htm", "c:\\now.htm", true);
}
}
finally
{
if (isImpersonated)
undoImpersonation();
}
}
}
}
五、比较方法一通过调用Shell命令Net Use实现,有点笨拙。
方法二和方法一有些相似之处。映射远程资源,然后访问。
方法三由于会有超时异常出现,所以在网络速度快、传输小文件时是可以的。
方法四通过身份模拟实现远程资源访问。一些服务器进程就是通过这种方式运行的。这种方法也是我的最爱。六、要注意的地方关于这几种方法,google后都可以找到一些文章。但是等到自己实际测试时,有时会出现各种小错误,
这些错误基本来源于两方面:1、函数的参数选择有问题,和自己的环境不相符。
比如
public static extern int LogonUser(String lpszUserName,
String lpszDomain,
String lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken);
中的dwLogonType,要访问远程资源就要用LOGON32_LOGON_NEW_CREDENTIALS,
要模拟本机用户就要用LOGON32_LOGON_INTERACTIVE。2、函数的参数格式有问题。 a、比如
public static extern int LogonUser(String lpszUserName,
String lpszDomain,
String lpszPassword,
int dwLogonType,
int dwLogonProvider,
ref IntPtr phToken);
中的lpszUserName、lpszDomain、lpszPassword就要写清楚。 我就在这遇到过问题,第一次测试时,远程服务器就是一台独立的文件服务器,这是我的调用方式:
LogonUser("myname", "192.168.1.48", "password", LOGON32_LOGON_NEW_CREDENTIALS,
LOGON32_PROVIDER_DEFAULT, ref token); 第二次测试时,远程服务器是域MyDomain中的一个成员服务器,提供文件服务。这时代码就应该是:
LogonUser("myname", "MyDomain", "password", LOGON32_LOGON_NEW_CREDENTIALS,
LOGON32_PROVIDER_DEFAULT, ref token); 注意,代码中是MyDomain而不是IP地址。
b、再如: 参考上面代码
string remote = @"\\192.168.1.48\generals";
string local = @"P:";
string username = @"Domain\UserName";
string password = @"Password"; 如果@"\\192.168.1.48\generals"变成@"\\192.168.1.48\generals\”就会出错;
如果是域中的用户,那么把@"Domain\UserName"变成@"UserName"就会出错。