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
The output is as per below:
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
I am trying to convert the output to ASCII.
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().
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
You can use it this way:
Dim MonitorIds As List(Of MonitorID) = GetDesktopMonitorsID()
Will return (among other details):
MonitorIds(0).SerialNumberID = CNK4111179
MonitorIds(0).UserFriendlyName = HP L1530
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