如何从 DEV_BROADCAST_DEVICEINTERFACE 和设备实例 ID 获取友好的设备名称 [英] How to get friendly device name from DEV_BROADCAST_DEVICEINTERFACE and Device Instance ID

问题描述

我已经使用 RegisterDeviceNotification 并且可以成功接收 DEV_BROADCAST_DEVICEINTERFACE 消息.但是，返回结构中的 dbcc_name 字段始终为空.我的结构定义如下:

I've registered a window with RegisterDeviceNotification and can successfully recieve DEV_BROADCAST_DEVICEINTERFACE messages. However, the dbcc_name field in the returned struct is always empty. The struct I have is defined as such:

[StructLayout(LayoutKind.Sequential)]
public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
    [MarshalAs(UnmanagedType.LPStr)]
    public string dbcc_name;
}

我在 WM_DEVICECHANGE 消息.

And I'm using Marshal.PtrToStructure on the LParam of the WM_DEVICECHANGE message.

这应该有效吗?

或者更好...有没有其他方法可以在连接时获取设备名称?

Or even better... Is there an alternative way to get the name of a device upon connection?

编辑(02/05/2010 20:56GMT):

我通过这样做找到了如何填充 dbcc_name 字段:

I found out how to get the dbcc_name field to populate by doing this:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public struct DEV_BROADCAST_DEVICEINTERFACE
{
    public int dbcc_size;
    public int dbcc_devicetype;
    public int dbcc_reserved;
    public Guid dbcc_classguid;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=255)]
    public string dbcc_name;
}

但我仍然需要一种方法来从 int dbcc_name 中获取友好"名称.如下所示:

but I still need a way to get a "Friendly" name from what is int dbcc_name. It looks like the following:

?USB#VID_05AC&PID_1294​​&MI_00#0#{6bdd1fc6-810f-11d0-bec7-08002be2092f}

?USB#VID_05AC&PID_1294&MI_00#0#{6bdd1fc6-810f-11d0-bec7-08002be2092f}

我真的只是想让它说Apple iPhone"(在这种情况下就是设备).

And I really just want it to say "Apple iPhone" (which is what the device is in this case).

推荐答案

好吧，如上所述，我发现了如何正确填充 dbcc_name.我发现这是获取设备名称的最简单方法:

Well, as noted above I found out how to get dbcc_name to populate correctly. I found that this was the easiest way to get the device name:

private static string GetDeviceName(DEV_BROADCAST_DEVICEINTERFACE dvi)
{
    string[] Parts = dvi.dbcc_name.Split('#');
    if (Parts.Length >= 3)
    {
        string DevType = Parts[0].Substring(Parts[0].IndexOf(@"?") + 2);
        string DeviceInstanceId = Parts[1];
        string DeviceUniqueID = Parts[2];
        string RegPath = @"SYSTEMCurrentControlSetEnum" + DevType + "\" + DeviceInstanceId + "\" + DeviceUniqueID;
        RegistryKey key = Registry.LocalMachine.OpenSubKey(RegPath);
        if (key != null)
        {
            object result = key.GetValue("FriendlyName");
            if (result != null)
                return result.ToString();
            result = key.GetValue("DeviceDesc");
            if (result != null)
                return result.ToString();
        }
    }
    return String.Empty;
}

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