WmiMonitorID - 将结果转换为 ASCII [英] WmiMonitorID - Converting the results to ASCII

问题描述

我正在尝试查询显示器的序列号和型号.
我设法使用 WMI 代码创建器生成以下代码:

Am attempting to query the serial number and the model of the monitor.
I managed to use the WMI code creator to generate the below code:

Try
    Dim MInfo As New ManagementObjectSearcher("root\WMI", "SELECT * FROM WmiMonitorID")

    For Each Monitor In MInfo.Get()
        If Monitor("SerialNumberID") Is Nothing Then
            MsgBox("NA")
        Else
            Dim arrSerialNumberID As UInt16()
            arrSerialNumberID = Monitor("SerialNumberID")
            For Each arrValue As UInt16 In arrSerialNumberID
                Console.WriteLine("Serial: " & arrValue)
            Next
        End If
        If Monitor("UserFriendlyName") Is Nothing Then
            MsgBox("NA")
        Else
            Dim arrSerialNumberID As UInt16()
            arrSerialNumberID = Monitor("UserFriendlyName")
            For Each arrValue As UInt16 In arrSerialNumberID
                Console.WriteLine("Model: " & arrValue)
            Next
        End If
    Next
Catch err As ManagementException
    MessageBox.Show("An error occurred while querying for WMI data: " & err.Message)
 End Try

输出如下:

SerialNumberID: 67,78,75,52,49,49,49,49,55,57,0,0,0,0,0,0    
UserFriendlyName: 104,112,32,76,49,53,51,48,0,0,0,0,0

我正在尝试将输出转换为 ASCII.

I am trying to convert the output to ASCII.

推荐答案

返回的数组需要转成字符串，对人眼友好.
UInt16 字节数组可以使用 Convert.ToByte(UInt16)，然后用 Encoding.UTF8.GetString().

The returned array needs to be converted to a string, to become human-eye-friendly.
The UInt16 byte array can be converted with Convert.ToByte(UInt16), then transformed into string with Encoding.UTF8.GetString().

这里，一个转换方法包含在一个专门的类 (MonitorID) 中，用于返回系统中所有监视器的一些信息，查询 \WMI\WmiMonitorID.
它可以使用 \CIMV2\Win32_DesktopMonitor

Here, a conversion method is included in a specialized class (MonitorID) that is used to return some information on all Monitors in a System, querying \WMI\WmiMonitorID.
It could be extended with \CIMV2\Win32_DesktopMonitor

你可以这样使用:

Dim MonitorIds As List(Of MonitorID) = GetDesktopMonitorsID()

将返回(以及其他详细信息):

Will return (among other details):

MonitorIds(0).SerialNumberID = CNK4111179  
MonitorIds(0).UserFriendlyName = HP L1530  

类和 WMI 查询方法:

Class and WMI Query method:

Imports System.Management

Public Class MonitorID
    Public Property Active As Boolean?
    Public Property InstanceName As String
    Public Property ManufacturerName As String
    Public Property ProductCodeID As String
    Public Property SerialNumberID As String
    Public Property UserFriendlyName As String
    Public Property WeekOfManufacture As String
    Public Property YearOfManufacture As String

    Public Shared Function ConvertToString(mObject As Object) As String
        If mObject Is Nothing Then Return String.Empty
        Return Encoding.UTF8.GetString(CType(mObject, UInt16()).
            TakeWhile(Function(ui) ui <> 0).Select(Function(ui) Convert.ToByte(ui)).ToArray())
    End Function
End Class


Public Shared Function GetDesktopMonitorsID() As List(Of MonitorID)
    Dim MonitorsIds As New List(Of MonitorID)()

    Dim ConnOptions As New ConnectionOptions() With {
        .EnablePrivileges = True,
        .Timeout = EnumerationOptions.InfiniteTimeout
    }

    Dim mOptions As New EnumerationOptions() With {
        .Rewindable = False,
        .ReturnImmediately = True,
        .DirectRead = True,
        .EnumerateDeep = False
    }

    Dim mQuery As New SelectQuery("SELECT * FROM WmiMonitorID")
    Dim mScope As New ManagementScope($"\\{Environment.MachineName}\root\WMI", ConnOptions)
    mScope.Connect()

    Using moSearcher As New ManagementObjectSearcher(mScope, mQuery, mOptions)
        For Each moMonitor As ManagementObject In moSearcher.[Get]()

        MonitorsIds.Add(New MonitorID() With {
            .Active = CType(moMonitor("Active"), Boolean?),
            .InstanceName = moMonitor("InstanceName")?.ToString(),
            .ManufacturerName = MonitorID.ConvertToString(moMonitor("ManufacturerName")),
            .ProductCodeID = MonitorID.ConvertToString(moMonitor("ProductCodeID")),
            .SerialNumberID = MonitorID.ConvertToString(moMonitor("SerialNumberID")),
            .UserFriendlyName = MonitorID.ConvertToString(moMonitor("UserFriendlyName")),
            .WeekOfManufacture = moMonitor("WeekOfManufacture")?.ToString(),
            .YearOfManufacture = moMonitor("YearOfManufacture")?.ToString()
        })
        Next
    End Using
    Return MonitorsIds
End Function

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