怎么写代码触发win7系统里显示设置里的检测操作

你可以使用以下代码来触发win7系统里显示设置里的检测操作：

[DllImport("user32.dll")]
public static extern bool EnumDisplayDevices(string lpDevice, uint iDevNum, ref DISPLAY_DEVICE lpDisplayDevice, uint dwFlags);

[DllImport("user32.dll")]
public static extern bool EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE devMode);

[DllImport("user32.dll")]
public static extern int ChangeDisplaySettingsEx(string lpszDeviceName, ref DEVMODE lpDevMode, IntPtr hwnd, uint dwflags, IntPtr lParam);

[StructLayout(LayoutKind.Sequential)]
public struct DEVMODE
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string dmDeviceName;

    public short dmSpecVersion;
    public short dmDriverVersion;
    public short dmSize;
    public short dmDriverExtra;
    public int dmFields;

    public short dmOrientation;
    public short dmPaperSize;
    public short dmPaperLength;
    public short dmPaperWidth;

    public short dmScale;
    public short dmCopies;
    public short dmDefaultSource;
    public short dmPrintQuality;
    public short dmColor;
    public short dmDuplex;
    public short dmYResolution;
    public short dmTTOption;
    public short dmCollate;

    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string dmFormName;

    public short dmUnusedPadding;
    public int dmBitsPerPel;
    public int dmPelsWidth;
    public int dmPelsHeight;
    public int dmDisplayFlags;
    public int dmDisplayFrequency;
    public int dmICMMethod;
    public int dmICMIntent;
    public int dmMediaType;
    public int dmDitherType;
    public int dmReserved1;
    public int dmReserved2;
    public int dmPanningWidth;
    public int dmPanningHeight;
}

[StructLayout(LayoutKind.Sequential)]
public struct DISPLAY_DEVICE
{
    public int cb;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string DeviceName;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
    public string DeviceString;
    public int StateFlags;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
    public string DeviceID;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
    public string DeviceKey;
}

private const int ENUM_CURRENT_SETTINGS = -1;
private const int CDS_UPDATEREGISTRY = 0x01;
private const int CDS_TEST = 0x02;
private const int DISP_CHANGE_SUCCESSFUL = 0;
private const int DISP_CHANGE_BADDUALVIEW = -6;

public void TriggerDisplayDetection()
{
    DISPLAY_DEVICE displayDevice = new DISPLAY_DEVICE();
    displayDevice.cb = Marshal.SizeOf(displayDevice);

    // 枚举显示器设备
    for (uint i = 0; EnumDisplayDevices(null, i, ref displayDevice, 0); i++)
    {
        // 获取显示器的设备名称
        string deviceName = displayDevice.DeviceName.Trim();
        if (deviceName.StartsWith("DISPLAY"))
        {
            DEVMODE devMode = new DEVMODE();
            devMode.dmSize = (short)Marshal.SizeOf(devMode);

            // 枚举显示器的显示模式
            for (int modeNum = 0; EnumDisplaySettings(deviceName, modeNum, ref devMode); modeNum++)
            {
                // 设置显示器的显示模式
                int result = ChangeDisplaySettingsEx(deviceName, ref devMode, IntPtr.Zero, CDS_TEST | CDS_UPDATEREGISTRY, IntPtr.Zero);
                if (result == DISP_CHANGE_SUCCESSFUL)
                {
                    ChangeDisplaySettingsEx(deviceName, ref devMode, IntPtr.Zero, CDS_UPDATEREGISTRY, IntPtr.Zero);
                    break;
                }
                else if (result == DISP_CHANGE_BADDUALVIEW)
                {
                    // 如果检测到双屏显示，则忽略该显示器
                    break;
                }
            }
        }
    }
}

这里的 `TriggerDisplayDetection()` 方法会枚举系统中的显示器设备，并依次设置它们的显示模式，从而触发检测操作。该方法调用后会使系统重新检测并配置显示器。