Question

我正在开发一个使用额外显示器（Wacom平板电脑）的应用程序。我需要确定它的放置位置，但我从java代码收集的DisplayName总是显示0，显示1等... 我尝试使用小型c ++来获取系统显示：

void DumpDevice(const DISPLAY_DEVICE& dd, size_t nSpaceCount)
{   
    printf("%*sDevice Name: %s\n", nSpaceCount, "", dd.DeviceName);
    printf("%*sDevice String: %s\n", nSpaceCount, "", dd.DeviceString);
    printf("%*sState Flags: %x\n", nSpaceCount, "", dd.StateFlags);
    printf("%*sDeviceID: %s\n", nSpaceCount, "", dd.DeviceID);
    printf("%*sDeviceKey: ...%s\n\n", nSpaceCount, "", dd.DeviceKey + 42);
}

int main()
{
    DISPLAY_DEVICE dd;

    dd.cb = sizeof(DISPLAY_DEVICE);

    DWORD deviceNum = 0;
    while (EnumDisplayDevices(NULL, deviceNum, &dd, 0)){
        DumpDevice(dd, 0);
        DISPLAY_DEVICE newdd = { 0 };
        newdd.cb = sizeof(DISPLAY_DEVICE);
        DWORD monitorNum = 0;
        while (EnumDisplayDevices(dd.DeviceName, monitorNum, &newdd, 0))
        {
            DumpDevice(newdd, 4);
            monitorNum++;
        }
        puts("");
        deviceNum++;
    }

    system("pause");

    return 0;
}

（我从堆栈溢出的另一个答案中获取此代码，但我不记得链接到它的页面。）

无论如何，输出真的没用：

Device Name: \
Device String: I
State Flags: 5
DeviceID: P
DeviceKey: ...\

    Device Name: \
    Device String: G
    State Flags: 3
    DeviceID: M
    DeviceKey: ...\


Device Name: \
Device String: I
State Flags: 1
DeviceID: P
DeviceKey: ...\

    Device Name: \
    Device String: G
    State Flags: 3
    DeviceID: M
    DeviceKey: ...\


Device Name: \
Device String: I
State Flags: 1
DeviceID: P
DeviceKey: ...\

    Device Name: \
    Device String: G
    State Flags: 3
    DeviceID: M
    DeviceKey: ...\


Device Name: \
Device String: I
State Flags: 8000000
DeviceID: P
DeviceKey: ...\


Device Name: \
Device String: I
State Flags: 0
DeviceID: P
DeviceKey: ...\


Device Name: \
Device String: I
State Flags: 0
DeviceID: P
DeviceKey: ...\

有什么提示可以解决这个问题吗？

编辑：在Java应用程序中需要这一切，我使用c ++创建一个简单的包装并使用JNI来调用我的包。如果存在，更好的方法是在不通过c ++的情况下做到这一点更好。

Answer 1

我改为ANSII charset，现在输出如下（感谢SirDarius提示）：

Device Name: \\.\DISPLAY1
Device String: Intel(R) HD Graphics Family
State Flags: 5
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0000

    Device Name: \\.\DISPLAY1\Monitor0
    Device String: Generic PnP Monitor
    State Flags: 3
    DeviceID: MONITOR\AUO133D\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
    DeviceKey: ...\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003


Device Name: \\.\DISPLAY2
Device String: Intel(R) HD Graphics Family
State Flags: 1
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0001

    Device Name: \\.\DISPLAY2\Monitor0
    Device String: Generic PnP Monitor
    State Flags: 3
    DeviceID: MONITOR\DELA0B9\{4d36e96e-e325-11ce-bfc1-08002be10318}\0004
    DeviceKey: ...\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0004


Device Name: \\.\DISPLAY3
Device String: Intel(R) HD Graphics Family
State Flags: 1
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0002

    Device Name: \\.\DISPLAY3\Monitor0
    Device String: Generic PnP Monitor
    State Flags: 3
    DeviceID: MONITOR\WAC1039\{4d36e96e-e325-11ce-bfc1-08002be10318}\0006
    DeviceKey: ...\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0006


Device Name: \\.\DISPLAY4
Device String: Intel(R) HD Graphics Family
State Flags: 8000000
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0003


Device Name: \\.\DISPLAY5
Device String: Intel(R) HD Graphics Family
State Flags: 8000000
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0004


Device Name: \\.\DISPLAY6
Device String: Intel(R) HD Graphics Family
State Flags: 8000000
DeviceID: PCI\VEN_8086&DEV_0A16&SUBSYS_05CB1028&REV_0B
DeviceKey: ...\Control\Video\{80DB7D25-0399-49FD-A13A-F5FEAD8FCC0B}\0005

如何查看显示器的友好名称，所有显示为Generic PnP！

连接的监视器名称

1 个答案: