重启网卡的几种方法

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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

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：重启网卡的几种方法