我正在尝试在PC中启用媒体设备。我可以使用WMI来获取设备列表,但是似乎没有属性来标识设备是否启用(我指的是设备管理器中的设备状态)。
我目前正在使用此代码来获取工作良好的设备列表。然而,如果用户已经禁用了设备,它仍然由这个列表返回,我的应用程序试图使用它,但显然不能使用…
private static ManagementObjectCollection GetMediaDevices()
{
ManagementObjectSearcher objSearcher =
new ManagementObjectSearcher("SELECT HardwareID FROM Win32_PnPSignedDriver Where DeviceClass = 'MEDIA'");
return objSearcher.Get();
}
我已经看了所有的属性(SELECT *
),但似乎没有这个信息。
任何想法?
我得到了一些像这样的代码片段。
public static List<DeviceCompactInfo> GetPnPDeviceInfo(string captionLikeCondition)
{
var selectQuery = "SELECT Caption, Description, Manufacturer, SystemName, DeviceID From Win32_PnPEntity ";
var query = string.Format("{0} WHERE ConfigManagerErrorCode = 0 and Caption like '{1}' ", selectQuery, captionLikeCondition);
var searcher = new System.Management.ManagementObjectSearcher(query);
var pnpList = searcher.Get().Cast<System.Management.ManagementBaseObject>()
.Select(x => new DeviceCompactInfo
{
Name = Convert.ToString(x["Caption"]),
Description = Convert.ToString(x["Description"]),
Manufacturer = Convert.ToString(x["Manufacturer"]),
SystemName = Convert.ToString(x["SystemName"]),
DeviceID = Convert.ToString(x["DeviceID"]),
})
.ToList();
return pnpList;
}
[System.Diagnostics.DebuggerDisplay("Name:{Name}, Description:{Description}, Manufacturer:{Manufacturer}, SystemName:{SystemName}, DeviceID:{DeviceID}", Name = "DeviceCompactInfo")]
public class DeviceCompactInfo
{
public string Name
{
get;
set;
}
public string Description
{
get;
set;
}
public string Manufacturer
{
get;
set;
}
public string SystemName
{
get;
set;
}
public string DeviceID
{
get;
set;
}
}
和call
GetPnPDeviceInfo("%cam%").Select(x => x.Name).ToList()
或"%COM%"给captionlikeconcondition参数。
如果你得到启用信息添加到where条件ConfigManagerErrorCode = 0参见https://msdn.microsoft.com/en-us/library/aa394353%28v=vs.85%29.aspx?f=255&MSPPError=-2147217396