我正在尝试检索系统上存在的所有各种监视器（及其适配器）的信息。到目前为止，我尝试使用 EnumDisplayDevices 列出所有显示器效果很好 - 它发现了两个，第一个是 "\\.\DISPLAY1\Monitor0" （第二个是分别只是 2 和 1，但这与这个问题无关）。无论如何，然后我尝试对其调用 EnumDisplaySettingsEx ，并按上面的方式传递监视器的名称，但它总是失败。使用空名称参数的调用成功，但返回的 DEVMODE 结构表示 dmDeviceName 是“cdd”，我非常怀疑它是否准确。我做错了什么？
哦，我尝试过使用 EnumDisplaySettings （非 Ex 的），但它甚至不适用于 null 名称参数。
P/Invoke 签名（Ex 对 pinvoke.net 上的签名进行了轻微修改，尝试使其正常工作）：
[DllImport("user32.dll")]
public static extern bool EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE devMode);
[DllImport("user32.dll", CharSet = CharSet.Ansi)]
public static extern bool EnumDisplaySettingsEx([MarshalAs(UnmanagedType.LPStr)]string lpszDeviceName, int iModeNum, ref DEVMODE lpDevMode, EdsDwFlags dwFlags);
DEVMODE 在 http://www.pinvoke.net/default.aspx/Structures/DEVMODE.html。 EdsDwFlags 目前始终为零。 iModeNum 为 -1（对于当前设置）。
由于某种原因，StackOveflow 不允许我在这篇文章中附加 C# 标签。
I am attempting to retrieve information on all the various monitors (and their adapters) present on a system. So far, my attempts at using EnumDisplayDevices to list all the monitors has worked great - it found two, the first being "\\.\DISPLAY1\Monitor0" (the second is just 2 and 1, respectively, but it's irrelevant to this question). Anyway, I then attempted to call EnumDisplaySettingsEx on it, passing the name of the monitor as above, but it always fails. Calls with a null name parameter succeed, but the DEVMODE structure returned says the dmDeviceName is "cdd" which I highly doubt is accurate. What am I doing wrong?
Oh, and I've tried using EnumDisplaySettings (the non-Ex one) and that doesn't even work with the null name parameter.
P/Invoke signatures (Ex's slightly modified from the one on pinvoke.net in a flailing attempt to get it to work):
[DllImport("user32.dll")]
public static extern bool EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE devMode);
[DllImport("user32.dll", CharSet = CharSet.Ansi)]
public static extern bool EnumDisplaySettingsEx([MarshalAs(UnmanagedType.LPStr)]string lpszDeviceName, int iModeNum, ref DEVMODE lpDevMode, EdsDwFlags dwFlags);
DEVMODE is defined at http://www.pinvoke.net/default.aspx/Structures/DEVMODE.html. EdsDwFlags for now is always zero. iModeNum is -1 (for current settings).
And for some reason StackOveflow won't let me attach a C# tag to this post.
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我是个白痴，你应该将显示适配器传递给这个函数，而不是显示器。仅传递
"\\.\DISPLAY1"效果很好。不过，我仍然收到
dmDeviceName字段的垃圾信息，因此我很感激任何有关我如何出错的建议。I'm an idiot, you're supposed to pass a display adapter to this function, not a monitor. Passing just
"\\.\DISPLAY1"worked fine.I'm still getting garbage back for the
dmDeviceNamefield, though, so I'd appreciate any suggestions as to how I got that wrong.