重启网卡的几种方法

1.重启windows网卡命令

rem 禁用网卡
netsh interface set interface 本地连接 disabled
rem 启用网卡

netsh interface set interface 本地连接 enabled

2.根据相关信息作出如下修改

rem 禁用网卡
netsh interface set interface 以太网 disabled
rem 启用网卡

netsh interface set interface 以太网 enabled

三、以下是网上找到的C++代码，

调试OK，需要管理员模式，requireAdministrator (/level='requireAdministrator')，不知道原文地址了，着时尴尬

方法一，VS2015 ANSI

// lan2.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <stdio.h>#include <windows.h>#include <Setupapi.h>#include <objbase.h>#pragma comment(lib, "Setupapi.lib")void EnumDevices(HDEVINFO hDevInfo){SP_DEVINFO_DATA DeviceInfoData = { sizeof(SP_DEVINFO_DATA) };LPOLESTR guid;char devName[128];char instanceId[128];for (int i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); i++){StringFromCLSID(DeviceInfoData.ClassGuid, &guid);SetupDiClassNameFromGuid(&DeviceInfoData.ClassGuid, devName, 128, NULL);//printf("%s\n", devName);;if (!strcmp(devName, "Net")){SetupDiGetDeviceInstanceId(hDevInfo, &DeviceInfoData, instanceId, 128, NULL);//printf("instanceId1:%s\n", instanceId);if (!strncmp(instanceId, "PCI", 3)){//wprintf(L"guid:%s\n", guid);//printf("devName:%s\n", devName);//printf("instanceId2:%s\n", instanceId);SP_PROPCHANGE_PARAMS params = { sizeof(SP_CLASSINSTALL_HEADER) };params.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;params.Scope = DICS_FLAG_CONFIGSPECIFIC; params.StateChange = DICS_DISABLE;//params.StateChange = DICS_ENABLE;params.HwProfile = 0;SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER*)¶ms, sizeof(SP_PROPCHANGE_PARAMS));SetupDiChangeState(hDevInfo, &DeviceInfoData);}}CoTaskMemFree(guid);}}int main(int argc, char* argv[]){HDEVINFO hDevInfo = INVALID_HANDLE_VALUE;hDevInfo = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES);if (INVALID_HANDLE_VALUE == hDevInfo)return GetLastError();EnumDevices(hDevInfo);SetupDiDestroyDeviceInfoList(hDevInfo);return 0;}

UNICODE mode

// lan2.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <stdio.h>#include <windows.h>#include <Setupapi.h>#include <objbase.h>#pragma comment(lib, "Setupapi.lib") int main(int argc, char* argv[]){HDEVINFO hDevInfo = INVALID_HANDLE_VALUE;hDevInfo = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES);if (INVALID_HANDLE_VALUE == hDevInfo)return GetLastError();//EnumDevices(hDevInfo);SP_DEVINFO_DATA DeviceInfoData = { sizeof(SP_DEVINFO_DATA) };LPOLESTR guid;wchar_t devName[128];wchar_t instanceId[128];for (int i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); i++){StringFromCLSID(DeviceInfoData.ClassGuid, &guid);SetupDiClassNameFromGuid(&DeviceInfoData.ClassGuid, devName, 128, NULL);// printf("%s\n", devName); if (!wcscmp(devName, _T("Net"))){SetupDiGetDeviceInstanceId(hDevInfo, &DeviceInfoData, instanceId, 128, NULL);//printf("instanceId1:%s\n", instanceId);if (!wcsncmp(instanceId, _T("PCI"), 3)){//wprintf(L"guid:%s\n", guid);//printf("devName:%s\n", devName);//printf("instanceId2:%s\n", instanceId);SP_PROPCHANGE_PARAMS params = { sizeof(SP_CLASSINSTALL_HEADER) };params.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;params.Scope = DICS_FLAG_CONFIGSPECIFIC; // params.StateChange = DICS_DISABLE;params.StateChange = DICS_ENABLE;params.HwProfile = 0;SetupDiSetClassInstallParams(hDevInfo, &DeviceInfoData, (SP_CLASSINSTALL_HEADER*)¶ms, sizeof(SP_PROPCHANGE_PARAMS));SetupDiChangeState(hDevInfo, &DeviceInfoData);}}CoTaskMemFree(guid);}SetupDiDestroyDeviceInfoList(hDevInfo);return 0;}

方法二.VS2015 UNICODE

SetupDiCallClassInstaller函数需要编译64位程序运行64位系统

// LAN.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include <windows.h>#include <SetupAPI.h>#include <stdio.h>#include <tchar.h>#define ERROR_IN_WOW64 (APPLICATION_ERROR_MASK|ERROR_SEVERITY_ERROR|0x235)#pragma comment(lib,"setupapi.lib")DWORD CtrlNetcard(BOOL bStatus);void _tmain(int arg, TCHAR** argv){BOOL b = FALSE;DWORD err = 0;if (2 == arg){argv++;if (!_tcsicmp(TEXT("enable"), *argv)){b = TRUE;err = CtrlNetcard(TRUE);}else if (!_tcsicmp(TEXT("disable"), *argv)){b = FALSE;err = CtrlNetcard(FALSE);}else{goto main_end;}_tprintf(_T("\n%s NetAdapter %s !\n"),b ? TEXT("Enable") : TEXT("Disable"),err ? TEXT("fail") : TEXT("success"));return;}main_end:_tprintf(TEXT("\nenable NetCard: enable"));_tprintf(TEXT("\ndisable NetCard: disable\n"));}DWORD CtrlNetcard(BOOL bStatus){LPCTSTR HardwareId = TEXT("{4D36E972-E325-11CE-BFC1-08002BE10318}");GUID g = { 0X4D36E972, 0XE325, 0X11CE,{ 0XBF, 0XC1, 0X08, 0X00, 0X2B, 0XE1, 0X03, 0X18 } };DWORD NewState = 0;//调用ddk函数，来禁用网卡    DWORD i = 0, err = 0;HDEVINFO hDevInfo = NULL;SP_DEVINFO_DATA spDevInfoData = { 0 };NewState = bStatus ? DICS_ENABLE : DICS_DISABLE;//访问系统的硬件库hDevInfo = SetupDiGetClassDevs(NULL, TEXT("PCI"), NULL, DIGCF_ALLCLASSES | DIGCF_PRESENT);if (INVALID_HANDLE_VALUE == hDevInfo){_tprintf(TEXT("访问系统硬件出错!"));return GetLastError();}//枚举硬件，获得需要的接口spDevInfoData.cbSize = sizeof(SP_DEVINFO_DATA);memcmp(&(spDevInfoData.ClassGuid), &g, sizeof(GUID));for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &spDevInfoData); i++){PBYTE PropertyBuffer = NULL;DWORD PropertyBufferSize = 0;//获得硬件的属性值while (!SetupDiGetDeviceRegistryProperty(hDevInfo,&spDevInfoData,SPDRP_CLASSGUID,NULL,PropertyBuffer,PropertyBufferSize,&PropertyBufferSize)){if (ERROR_INSUFFICIENT_BUFFER == GetLastError()){if (PropertyBuffer){free(PropertyBuffer);}PropertyBuffer = (PBYTE)malloc(PropertyBufferSize);}else{break;}}if (!PropertyBuffer){continue;} //MessageBox(NULL, (LPCTSTR)PropertyBuffer, L"提示", MB_OK); if (!_tcsicmp(HardwareId, (LPTSTR)PropertyBuffer)){SP_PROPCHANGE_PARAMS spPropChangeParams;//printf("PropertyBuffer ok\n");free(PropertyBuffer);spPropChangeParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);spPropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;spPropChangeParams.Scope = DICS_FLAG_GLOBAL;spPropChangeParams.StateChange = NewState;if (!SetupDiSetClassInstallParams(hDevInfo, &spDevInfoData, (SP_CLASSINSTALL_HEADER*)&spPropChangeParams, sizeof(spPropChangeParams))){err = GetLastError();printf("SetupDiSetClassInstallParams:%d\n", GetLastError());goto cleanup_DeviceInfo;}if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, &spDevInfoData)){err = GetLastError();printf("SetupDiCallClassInstaller:%x\n", GetLastError());goto cleanup_DeviceInfo;}}else{//printf("PropertyBuffer error\n");free(PropertyBuffer);}}cleanup_DeviceInfo:SetupDiDestroyDeviceInfoList(hDevInfo);return err;} 

方法三.网上相关：http://blog.csdn.net/buyicn/article/details/6438635