「ローカルネットワークの接続　有効･無効」の編集履歴（バックアップ）一覧はこちら

「ローカルネットワークの接続　有効･無効」(2008/06/22 (日) 13:11:18) の最新版変更点

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

public class NetWorkUtil
{
    #region プロパティ
    private static Guid GUID_DEVCLASS_NET = new Guid(0x4d36e972, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18);
    private const int DIGCF_PRESENT = 2;
    private const int DIF_PROPERTYCHANGE = 0x00000012;
    private const int DICS_FLAG_GLOBAL = 0x00000001;
    private const int INVALID_HANDLE_VALUE = -1;
    private const int DICS_ENABLE = 0x00000001;
    private const int DICS_DISABLE = 0x00000002;
    private const int DICS_FLAG_CONFIGSPECIFIC = 0x00000002;
    [StructLayout(LayoutKind.Sequential)]
    private struct SP_DEVINFO_DATA
    {
        public int cbSize;
        public Guid ClassGuid;
        public int DevInst;
        public int Reserved;
    }
    [StructLayout(LayoutKind.Sequential)]
    private struct SP_CLASSINSTALL_HEADER
    {
        public int cbSize;
        public int InstallFunction;
    }
    [StructLayout(LayoutKind.Sequential)]
    private struct SP_PROPCHANGE_PARAMS
    {
        public SP_CLASSINSTALL_HEADER ClassInstallHeader;
        public int StateChange;
        public int Scope;
        public int HwProfile;
        public void Init()
        {
            ClassInstallHeader = new SP_CLASSINSTALL_HEADER();
        }

    }
    #endregion

    #region SetUp API
    [DllImport("setupapi.dll")]
    private static extern IntPtr SetupDiGetClassDevs(ref Guid ClassGuid, IntPtr Enumerator, IntPtr hWndParent, int Flags);
    [DllImport("setupapi.dll")]
    private static extern bool SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, int Supplies, ref SP_DEVINFO_DATA DeviceInfoData);
    [DllImport("setupapi.dll")]
    private static extern bool SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
    [DllImport("setupapi.dll")]
    private static extern bool SetupDiSetClassInstallParams(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData, ref SP_CLASSINSTALL_HEADER ClassInstallParams, int ClassInstallParamsSize);
    [DllImport("setupapi.dll")]
    private static extern bool SetupDiCallClassInstaller(int InstallFunction, IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData);
    #endregion

    private static IntPtr hDevInfo = (IntPtr)0;
    private static bool StateChange(int NewState, int SelectedItem, IntPtr hDevInfo)
    {

        SP_PROPCHANGE_PARAMS PropChangeParams;
        SP_DEVINFO_DATA DeviceInfoData;
        PropChangeParams = new SP_PROPCHANGE_PARAMS();
        PropChangeParams.Init();
        DeviceInfoData = new SP_DEVINFO_DATA();
        PropChangeParams.ClassInstallHeader.cbSize = Marshal.SizeOf(PropChangeParams.ClassInstallHeader);
        DeviceInfoData.cbSize = Marshal.SizeOf(DeviceInfoData);
        if (!SetupDiEnumDeviceInfo(hDevInfo, SelectedItem, ref DeviceInfoData))
            return false;
        PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
        PropChangeParams.Scope = DICS_FLAG_GLOBAL;
        PropChangeParams.StateChange = NewState;
        if (!SetupDiSetClassInstallParams(hDevInfo, ref DeviceInfoData, ref PropChangeParams.ClassInstallHeader, Marshal.SizeOf(PropChangeParams)))
            return false;
        if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, ref DeviceInfoData))
            return false;
        PropChangeParams.ClassInstallHeader.InstallFunction = DIF_PROPERTYCHANGE;
        PropChangeParams.Scope = DICS_FLAG_CONFIGSPECIFIC;
        PropChangeParams.StateChange = NewState;
        if (!SetupDiSetClassInstallParams(hDevInfo, ref DeviceInfoData, ref PropChangeParams.ClassInstallHeader, Marshal.SizeOf(PropChangeParams)))
            return false;
        if (!SetupDiCallClassInstaller(DIF_PROPERTYCHANGE, hDevInfo, ref DeviceInfoData))
            return false;
        return true;
    }    
    /// <summary>
    /// ネットワークを無効にします。
    /// </summary>
    /// <returns>bool:処理の成否</returns>
    public static bool DisableNetAdapter()
    {
        IntPtr hdi;
        bool res = true;
        hdi = SetupDiGetClassDevs(ref GUID_DEVCLASS_NET, (IntPtr)0, (IntPtr)0, DIGCF_PRESENT);
        if (hdi == (IntPtr)INVALID_HANDLE_VALUE)
            return false;
        res = StateChange(DICS_DISABLE, 0, hdi);
        SetupDiDestroyDeviceInfoList(hdi);
        System.Threading.Thread.Sleep(500);
        return res;
    }
    /// <summary>
    /// <para>ネットワーク接続を有効にします</para>
    /// </summary>
    /// <returns>bool:処理の成否</returns>
    public static bool EnableNetAdapter()
    {
        IntPtr hdi;
        Boolean res = true;
        hdi = SetupDiGetClassDevs(ref GUID_DEVCLASS_NET, (IntPtr)0, (IntPtr)0, DIGCF_PRESENT);
        if (hdi == (IntPtr)INVALID_HANDLE_VALUE)
            return false;
        res = StateChange(DICS_ENABLE, 0, hdi);
        SetupDiDestroyDeviceInfoList(hdi);
        System.Threading.Thread.Sleep(500);
        return res;
    }
}