1、在Windows下用CMD netstat命令可以获得当前进程监听端口号的信息，如netstat -ano可以看到IP、port、状态和监听的PID。
那么可以执行CMD这个进程得到监听的端口号信息，C#代码如下：
//进程id
int pid = ProcInfo.ProcessID; //存放进程使用的端口号链表
List<int> ports = new List<int>(); Process pro = new Process();
pro.StartInfo.FileName = "cmd.exe";
pro.StartInfo.UseShellExecute = false;
pro.StartInfo.RedirectStandardInput = true;
pro.StartInfo.RedirectStandardOutput = true;
pro.StartInfo.RedirectStandardError = true;
pro.StartInfo.CreateNoWindow = true;
pro.Start();
pro.StandardInput.WriteLine("netstat -ano");
pro.StandardInput.WriteLine("exit");
Regex reg = new Regex("\\s+", RegexOptions.Compiled);
string line = null;
ports.Clear();
while ((line = pro.StandardOutput.ReadLine()) != null)
{
line = line.Trim();
if (line.StartsWith("TCP", StringComparison.OrdinalIgnoreCase))
{
line = reg.Replace(line, ",");
string[] arr = line.Split(',');
if (arr[] == pid.ToString())
{
string soc = arr[];
int pos = soc.LastIndexOf(':');
int pot = int.Parse(soc.Substring(pos + ));
ports.Add(pot);
}
}
else if (line.StartsWith("UDP", StringComparison.OrdinalIgnoreCase))
{
line = reg.Replace(line, ",");
string[] arr = line.Split(',');
if (arr[] == pid.ToString())
{
string soc = arr[];
int pos = soc.LastIndexOf(':');
int pot = int.Parse(soc.Substring(pos + ));
ports.Add(pot);
}
}
}
pro.Close();
2、如果不执行CMD进程，如何获得？可以参考这篇文章http://www.cnblogs.com/BoyXiao/archive/2012/02/20/2359273.html
文章介绍了使用Windows API获得进程和端口的映射关系：
（1）根据进程 ID 获得该进程所打开的所有的 TCP 和 UDP 端口。
（2）根据端口号来获得打开该端口的进程。
C语言代码如下：
// ProcessorPort.cpp : 定义 DLL 应用程序的导出函数。
// #include "stdafx.h" #include <Windows.h>
#include <Psapi.h>
#include <Iprtrmib.h>
#include <Winsock2.h> #pragma comment(lib,"Psapi.lib")
#pragma comment(lib,"Iphlpapi.Lib")
#pragma comment(lib,"WS2_32.lib") enum TcpOrUdp
{
TcpType,
UdpType
}; typedef struct
{
DWORD dwState; //连接状态
DWORD dwLocalAddr; //本地地址
DWORD dwLocalPort; //本地端口
DWORD dwRemoteAddr; //远程地址
DWORD dwRemotePort; //远程端口
DWORD dwProcessId; //进程标识
}MIB_TCPEXROW,*PMIB_TCPEXROW; typedef struct
{
DWORD dwLocalAddr; //本地地址
DWORD dwLocalPort; //本地端口
DWORD dwProcessId; //进程标识 }MIB_UDPEXROW,*PMIB_UDPEXROW; typedef struct
{
DWORD dwState; //连接状态
DWORD dwLocalAddr; //本地地址
DWORD dwLocalPort; //本地端口
DWORD dwRemoteAddr; //远程地址
DWORD dwRemotePort; //远程端口
DWORD dwProcessId; //进程标识
DWORD Unknown; //待定标识
}MIB_TCPEXROW_VISTA,*PMIB_TCPEXROW_VISTA; typedef struct
{
DWORD dwNumEntries;
MIB_TCPEXROW table[ANY_SIZE];
}MIB_TCPEXTABLE,*PMIB_TCPEXTABLE; typedef struct
{
DWORD dwNumEntries;
MIB_TCPEXROW_VISTA table[ANY_SIZE];
}MIB_TCPEXTABLE_VISTA,*PMIB_TCPEXTABLE_VISTA; typedef struct
{
DWORD dwNumEntries;
MIB_UDPEXROW table[ANY_SIZE];
}MIB_UDPEXTABLE,*PMIB_UDPEXTABLE; //=====================================================================================//
//Name: DWORD AllocateAndGetTcpExTableFromStack() // //
//Descripion: 该函数仅仅只在 Windows XP，Windows Server 2003 下有效 //
//=====================================================================================//
typedef DWORD (WINAPI *PFNAllocateAndGetTcpExTableFromStack)(
PMIB_TCPEXTABLE *pTcpTabel,
bool bOrder,
HANDLE heap,
DWORD zero,
DWORD flags
); //=====================================================================================//
//Name: DWORD AllocateAndGetUdpExTableFromStack() //
//Descripion: 该函数仅仅只在 XP，Windows Server 2003 下有效 //
//=====================================================================================//
typedef DWORD (WINAPI *PFNAllocateAndGetUdpExTableFromStack)(
PMIB_UDPEXTABLE *pUdpTable,
bool bOrder,
HANDLE heap,
DWORD zero,
DWORD flags
); //=====================================================================================//
//Name: DWORD InternalGetTcpTable2() //
//Descripion: 该函数在 Windows Vista 以及 Windows 7 下面效 //
//=====================================================================================//
typedef DWORD (WINAPI *PFNInternalGetTcpTable2)(
PMIB_TCPEXTABLE_VISTA *pTcpTable_Vista,
HANDLE heap,
DWORD flags
); //=====================================================================================//
//Name: DWORD InternalGetUdpTableWithOwnerPid() //
//Descripion: 该函数在 Windows Vista 以及 Windows 7 下面效 //
//=====================================================================================//
typedef DWORD (WINAPI *PFNInternalGetUdpTableWithOwnerPid)(
PMIB_UDPEXTABLE *pUdpTable,
HANDLE heap,
DWORD flags
); //=====================================================================================//
//Name: DWORD GetProcessIdByPort() //
//Descripion: 根据端口号得到打开该端口号的进程ID(支持 XP，Server 2003，Vista，Win7) //
//=====================================================================================//
extern "C" __declspec(dllexport) DWORD __stdcall GetProcessIdByPort(TcpOrUdp type, DWORD dwPort)
{
HMODULE hModule = LoadLibraryW(L"iphlpapi.dll");
if (hModule == NULL)
{
return ;
} if(type == TcpType)
{
// 表明查询的是 TCP 信息
PFNAllocateAndGetTcpExTableFromStack pAllocateAndGetTcpExTableFromStack;
pAllocateAndGetTcpExTableFromStack =
(PFNAllocateAndGetTcpExTableFromStack)GetProcAddress(hModule, "AllocateAndGetTcpExTableFromStack");
if (pAllocateAndGetTcpExTableFromStack != NULL)
{
// 表明为 XP 或者 Server 2003 操作系统
PMIB_TCPEXTABLE pTcpExTable = NULL;
if (pAllocateAndGetTcpExTableFromStack(&pTcpExTable, TRUE, GetProcessHeap(), , AF_INET) != )
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
} for (UINT i = ; i < pTcpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只查询我们需要的进程数据
if(dwPort == ntohs(0x0000FFFF & pTcpExTable->table[i].dwLocalPort))
{
DWORD dwProcessId = pTcpExTable->table[i].dwProcessId;
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwProcessId;
}
} if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
}
else
{
// 表明为 Vista 或者 7 操作系统
PMIB_TCPEXTABLE_VISTA pTcpExTable = NULL;
PFNInternalGetTcpTable2 pInternalGetTcpTable2 =
(PFNInternalGetTcpTable2)GetProcAddress(hModule, "InternalGetTcpTable2");
if (pInternalGetTcpTable2 == NULL)
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
} if (pInternalGetTcpTable2(&pTcpExTable, GetProcessHeap(), ))
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
} for (UINT i = ;i < pTcpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只查询我们需要的进程数据
if(dwPort == ntohs(0x0000FFFF & pTcpExTable->table[i].dwLocalPort))
{
DWORD dwProcessId = pTcpExTable->table[i].dwProcessId;
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwProcessId;
}
} if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
}
}
else if(type == UdpType)
{
// 表明查询的是 UDP 信息
PMIB_UDPEXTABLE pUdpExTable = NULL;
PFNAllocateAndGetUdpExTableFromStack pAllocateAndGetUdpExTableFromStack;
pAllocateAndGetUdpExTableFromStack =
(PFNAllocateAndGetUdpExTableFromStack)GetProcAddress(hModule,"AllocateAndGetUdpExTableFromStack");
if (pAllocateAndGetUdpExTableFromStack != NULL)
{
// 表明为 XP 或者 Server 2003 操作系统
if (pAllocateAndGetUdpExTableFromStack(&pUdpExTable, TRUE, GetProcessHeap(), , AF_INET) != )
{
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
} for (UINT i = ; i < pUdpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只查询我们需要的进程数据
if (dwPort == ntohs(0x0000FFFF & pUdpExTable->table[i].dwLocalPort))
{
DWORD dwProcessId = pUdpExTable->table[i].dwProcessId;
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwProcessId;
}
} if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
}
else
{
// 表明为 Vista 或者 7 操作系统
PFNInternalGetUdpTableWithOwnerPid pInternalGetUdpTableWithOwnerPid;
pInternalGetUdpTableWithOwnerPid =
(PFNInternalGetUdpTableWithOwnerPid)GetProcAddress(hModule, "InternalGetUdpTableWithOwnerPid");
if (pInternalGetUdpTableWithOwnerPid != NULL)
{
if (pInternalGetUdpTableWithOwnerPid(&pUdpExTable, GetProcessHeap(), ))
{
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
} for (UINT i = ; i < pUdpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只查询我们需要的进程数据
if (dwPort == ntohs(0x0000FFFF & pUdpExTable->table[i].dwLocalPort))
{
DWORD dwProcessId = pUdpExTable->table[i].dwProcessId;
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwProcessId;
}
}
} if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return ;
}
}
else
{
FreeLibrary(hModule);
hModule = NULL; return -;
}
} //===========================================================================================//
//Name: DWORD GetAllPortByProcessId() //
//Descripion: 根据进程ID得到该进程所打开的所有的端口号，并且在 dwAllPort 数组中返回所有端口号//
// 其中 dwMaxLen 为数组的长度，函数的返回值为进程所打开的端口的数目 //
// (支持 XP，Server 2003，Vista，Win7) //
//===========================================================================================//
extern "C" __declspec(dllexport) DWORD __stdcall GetAllPortByProcessId(TcpOrUdp type, DWORD dwProcessId, DWORD * dwAllPort, DWORD dwMaxLen)
{
DWORD dwPortCount = ;
HMODULE hModule = LoadLibraryW(L"iphlpapi.dll");
if (hModule == NULL)
{
return dwPortCount;
} if(type == TcpType)
{
// 表明查询的是 UDP 信息
PFNAllocateAndGetTcpExTableFromStack pAllocateAndGetTcpExTableFromStack;
pAllocateAndGetTcpExTableFromStack = (PFNAllocateAndGetTcpExTableFromStack)GetProcAddress(hModule, "AllocateAndGetTcpExTableFromStack");
if (pAllocateAndGetTcpExTableFromStack != NULL)
{
// 表明为 XP 或者 Server 2003 操作系统
PMIB_TCPEXTABLE pTcpExTable = NULL;
if (pAllocateAndGetTcpExTableFromStack(&pTcpExTable, TRUE, GetProcessHeap(), , AF_INET) != )
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
} for (UINT i = ; i < pTcpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只获取我们要查询的进程的 Port 信息
if(dwProcessId == pTcpExTable->table[i].dwProcessId)
{
if(dwPortCount < dwMaxLen)
{
dwAllPort[dwPortCount] = ntohs(0x0000FFFF & pTcpExTable->table[i].dwLocalPort);
dwPortCount++;
}
}
} if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
}
else
{
// 表明为 Vista 或者 7 操作系统
PMIB_TCPEXTABLE_VISTA pTcpExTable = NULL;
PFNInternalGetTcpTable2 pInternalGetTcpTable2 = (PFNInternalGetTcpTable2)GetProcAddress(hModule, "InternalGetTcpTable2");
if (pInternalGetTcpTable2 == NULL)
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
} if (pInternalGetTcpTable2(&pTcpExTable, GetProcessHeap(), ))
{
if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
} for (UINT i = ;i < pTcpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只获取我们要查询的进程的 TCP Port 信息
if(dwProcessId == pTcpExTable->table[i].dwProcessId)
{
if(dwPortCount < dwMaxLen)
{
dwAllPort[dwPortCount] = ntohs(0x0000FFFF & pTcpExTable->table[i].dwLocalPort);
dwPortCount++;
}
}
} if (pTcpExTable)
{
HeapFree(GetProcessHeap(), , pTcpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
}
}
else if(type == UdpType)
{
// 表明查询的是 UDP 信息
PMIB_UDPEXTABLE pUdpExTable = NULL;
PFNAllocateAndGetUdpExTableFromStack pAllocateAndGetUdpExTableFromStack;
pAllocateAndGetUdpExTableFromStack = (PFNAllocateAndGetUdpExTableFromStack)GetProcAddress(hModule,"AllocateAndGetUdpExTableFromStack");
if (pAllocateAndGetUdpExTableFromStack != NULL)
{
// 表明为 XP 或者 Server 2003 操作系统
if (pAllocateAndGetUdpExTableFromStack(&pUdpExTable, TRUE, GetProcessHeap(), , AF_INET) != )
{
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
} for (UINT i = ; i < pUdpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只获取我们要查询的进程的 UDP Port信息
if(dwProcessId == pUdpExTable->table[i].dwProcessId)
{
if(dwPortCount < dwMaxLen)
{
dwAllPort[dwPortCount] = ntohs(0x0000FFFF & pUdpExTable->table[i].dwLocalPort);
dwPortCount++;
}
}
} if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
}
else
{
// 表明为 Vista 或者 7 操作系统
PFNInternalGetUdpTableWithOwnerPid pInternalGetUdpTableWithOwnerPid;
pInternalGetUdpTableWithOwnerPid = (PFNInternalGetUdpTableWithOwnerPid)GetProcAddress(hModule, "InternalGetUdpTableWithOwnerPid");
if (pInternalGetUdpTableWithOwnerPid != NULL)
{
if (pInternalGetUdpTableWithOwnerPid(&pUdpExTable, GetProcessHeap(), ))
{
if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
} for (UINT i = ; i < pUdpExTable->dwNumEntries; i++)
{
// 过滤掉数据，只获取我们要查询的进程的 UDP Port信息
if(dwProcessId == pUdpExTable->table[i].dwProcessId)
{
if(dwPortCount < dwMaxLen)
{
dwAllPort[dwPortCount] = ntohs(0x0000FFFF & pUdpExTable->table[i].dwLocalPort);
dwPortCount++;
}
}
}
} if (pUdpExTable)
{
HeapFree(GetProcessHeap(), , pUdpExTable);
} FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
}
}
else
{
FreeLibrary(hModule);
hModule = NULL; return dwPortCount;
}
}
如果要在.Net平台下使用，将其编译成DLL，使用PInvoke得到DLL导出函数就可以了。
C#测试代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices; namespace ProcessorPortDllTest
{
public enum TcpOrUdp
{
TcpType,
UdpType
}; public class ProcessPortHelper
{
[DllImport("ProcessorPort.dll",CallingConvention = CallingConvention.StdCall)]
public extern static uint GetProcessIdByPort(TcpOrUdp type, uint dwPort); [DllImport("ProcessorPort.dll",CallingConvention = CallingConvention.StdCall)]
public extern static uint GetAllPortByProcessId(TcpOrUdp type, uint dwProcessId, uint[] dwAllPort, uint dwMaxLen);
} class Program
{
static void Main(string[] args)
{
uint port = ;
uint processorId = ProcessPortHelper.GetProcessIdByPort(TcpOrUdp.TcpType, port);
Console.WriteLine("Port {0} is using by processor {1}",port,processorId); uint processorId1 = ; uint[] TcpPorts = new uint[];
uint count = ProcessPortHelper.GetAllPortByProcessId(TcpOrUdp.TcpType, processorId1, TcpPorts, (uint)TcpPorts.Length);
Console.WriteLine("Processor {0} is using TCP port: ", processorId1);
for (uint i = ; i < count; ++i)
{
Console.WriteLine(TcpPorts[i]);
} uint[] UdpPorts = new uint[];
uint count1 = ProcessPortHelper.GetAllPortByProcessId(TcpOrUdp.UdpType, processorId1, UdpPorts, (uint)UdpPorts.Length);
Console.WriteLine("Processor {0} is using UDP port: ", processorId1);
for (uint i = ; i < count1; ++i)
{
Console.WriteLine(UdpPorts[i]);
}
Console.ReadKey();
}
}
}
获得进程监听TCP/UDP端口号的DLL：ProcessorPort.rar