Develop Reference

How to find Active (In Use) Graphic Cards? C#

I used this code for finding graphic cards:
ManagementScope scope = new ManagementScope("\\\\.\\ROOT\\cimv2");
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_VideoController");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection queryCollection = searcher.Get();
string graphicsCard = "";
foreach (ManagementObject mo in queryCollection)
{
foreach (PropertyData property in mo.Properties)
{
if (property.Name == "Description")
{
graphicsCard += property.Value.ToString() + " ";
}
}
}
I have two graphic cards:
Above code return all graphic cards.
How to find active graphic card that chosen by windows?

try this
ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_VideoController");
string graphicsCard = string.Empty;
foreach (ManagementObject obj in searcher.Get())
{
if (obj["CurrentBitsPerPixel"] != null && obj["CurrentHorizontalResolution"] != null)
{
graphicsCard = obj["Name"].ToString();
}
}

Using ManagementObjectSearcher to query Win32_PnPEntity comes back empty

OK, so this drives me nuts.
The code below worked just fine in Windows 7 with .NET 3.5.
In Windows 8.1 and .NET 4.5.1 I get an empty result, but using the WMI Code Creator I can get the results.
I cannot find anything about this online.
I want to get the friendly names of any COM ports, e.g. "Communications Port (COM1)".
Just using System.IO.Ports.SerialPort.GetPortNames() wont do.
I really hope someone know how to do this. Thanks!
using System;
using System.Collections.Generic;
using System.Management;
namespace OakHub
{
public class SerialMgmt
{
static public List<String> GetCOMDevices()
{
List<String> list = new List<String>();
ManagementScope scope = new ManagementScope(#"\\" + Environment.MachineName + #"\root\CIMV2");
SelectQuery sq = new SelectQuery("SELECT Caption FROM Win32_PnPEntity");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, sq);
ManagementObjectCollection moc = searcher.Get();
foreach (ManagementObject mo in moc)
{
String name = mo.ToString();
if (name.ToString().Contains("(COM"))
{
list.Add(name);
}
}
return list;
}
}
}

First of all I dont know why this code is even working for you (with .Net 3.5).
You just selected the property Caption. (Use * to select all, if needed)
I think you want the name of the Win32_PnPEntity-Devices, you cant get it with this line of code
String name = mo.ToString();
Because the Name is a property. You First have to load the Property with the WMI-String :
SELECT Name,Caption FROM Win32_PnPEntity //Get Name and Caption Property
or
SELECT * FROM Win32_PnPEntity //Load all the Propertys of that WMI-Obj
And than you have to check if value is null else --> return the value
Code:
public List<String> GetLocalCOMDevices()
{
List<String> list = new List<String>();
ManagementScope scope = new ManagementScope(#"\\" + Environment.MachineName + #"\root\CIMV2");
SelectQuery sq = new SelectQuery("SELECT Name,Caption FROM Win32_PnPEntity");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, sq);
ManagementObjectCollection moc = searcher.Get();
foreach (ManagementObject mo in moc)
{
object propName = mo.Properties["Name"].Value;
if (propName == null) { continue; }
list.Add(propName.ToString());
}
return list;
}

ManagementObjectSearcher is not working

I'm trying to get some info about RSOP_SecuritySettingBoolean but it returns an empty collection. Am i doing something wrong? Win7 x64 HP without domain:
var options = new ConnectionOptions();
var scope = new ManagementScope(#"\\.\root\RSOP\Computer", options);
var objectQuery = new ObjectQuery("SELECT * FROM RSOP_SecuritySettingBoolean");
using (var searcher = new ManagementObjectSearcher(scope, objectQuery))
{
foreach (ManagementObject o in searcher.Get())
{
Console.WriteLine("Key Name: {0}", o["KeyName"]);
Console.WriteLine("Precedence: {0}", o["Precedence"]);
Console.WriteLine("Setting: {0}", o["Setting"]);
}
}

How to get connection name used by the Windows Network adapter?

Is it possible get it using WMI query?
my current code:
ManagementObjectSearcher searcher = new ManagementObjectSearcher(
"SELECT * FROM Win32_NetworkAdapte");
foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine(queryObj[??]);
}
I'm tried get the connections name from:
Control Panel \ Network and Internet \ Network Connections

Using code below you would be able dump all properties of the Network Adapter, you need Name property:
ManagementObjectSearcher searcher = new ManagementObjectSearcher(
"SELECT * FROM Win32_NetworkAdapter");
foreach (ManagementObject adapter in searcher.Get())
{
StringBuilder propertiesDump = new StringBuilder();
foreach (var property in adapter.Properties)
{
propertiesDump.AppendFormat(
"{0} == {1}{2}",
property.Name,
property.Value,
Environment.NewLine);
}
}
OR simply using LINQ (add using System.Linq):
foreach (ManagementObject adapter in searcher.Get())
{
string adapterName = adapter.Properties
.Cast<PropertyData>()
.Single(p => p.Name == "Name")
.Value.ToString();
}
PS: Also be aware you've typo in WMI query - forgot r in Adapter: Win32_NetworkAdapte_r_

Let's change the code a little more and shorten it. ManagementClass class shortens the WMI query.
ManagementClass mc = new ManagementClass("Win32_NetworkAdapter");
ManagementObjectCollection results = mc.GetInstances();
foreach (var result in results)
{
foreach (PropertyData data in result.Properties)
Console.WriteLine($"{data.Name} == {data.Value}");
}

Get active sessions with wmi (Win32_LogonSession returns also inactive/old sessions)

Is there a way to show only active sessions with wmi?
The problem is that Win32_LogonSession shows also inactive/disconnected sessions.
ManagementScope scope = new ManagementScope(ManagementPath.DefaultPath);
SelectQuery query = new SelectQuery("Win32_LogonSession");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection results = searcher.Get();
foreach (ManagementObject mo in results)
{
PrintWmiObject(mo);
}
The output of this is something like this
AuthenticationPackage - Kerberos
Caption -
Description -
InstallDate -
LogonId - 10179411
LogonType - 10
Name -
StartTime - 20110617083244.547220+120
Status -

What about:
SelectQuery query = new SelectQuery("Select * from Win32_LogonSession Where LogonType = 10")