First of all, apologies if this doesn't make sense, and/or it has already been asked (although searching didn't find anything).
I have an application which sets default printers for our end users but I would like to expand it by also making it able to install printers from a remote machine as well.
What I need to do is on Form_Load populate a Combo Box with all network shares from the print server.
I am shooting in the dark and am wondering if anyone can shed some light.
I believe this works.
This isnt my code originally but I cant remember where it came from.
using System.Management;
private void btnGetPrinters_Click(object sender, EventArgs e) {
// Use the ObjectQuery to get the list of configured printers.
ObjectQuery oquery = new ObjectQuery("SELECT * FROM Win32_Printer");
ManagementObjectSearcher mosearcher = new ManagementObjectSearcher(oquery);
ManagementObjectCollection moc = mosearcher.Get();
foreach (ManagementObject mo in moc)
{
PropertyDataCollection pdc = mo.Properties;
foreach (System.Management.PropertyData pd in pdc)
{
if ((bool)mo["Network"])
{
cmbPrinters.Items.Add(mo[pd.Name]);
}
}
}
}
Related
I have a C# project where I am trying to deploy a protection mechanism by registering a combination of the Hardware IDs.
I am using the ManagementObjectSearcher Class for the same. Here are some of the commands:
ManagementObjectSearcher cpuget = new ManagementObjectSearcher("Select * From Win32_processor");
ManagementObjectSearcher mainboardget = new ManagementObjectSearcher("SELECT * FROM Win32_BaseBoard");
ManagementObjectSearcher biosget = new ManagementObjectSearcher("Select * From Win32_BIOS");
For fetching the IDs I have:
foreach (ManagementObject mo in cpuList)
{
cpuid = mo["ProcessorID"].ToString();
}
foreach (ManagementObject mo in mainboardlist)
{
mbid = mo["SerialNumber"].ToString();
}
This has been working fine. However, *in some machines(I tested on 10 PCs and two were defaulters)* the error message showed up.
Reference not set to Instance of an Object
Why so? Please Help.
The most difficult problems have the silliest of Answers. Period.
All I had to do was Check for a null component in the management object class.
foreach (ManagementObject mo in cpuget.Get())
{
if (mo["ProcessorID"] != null)
cpuid = mo.GetPropertyValue("ProcessorID").ToString();
}
The similar would be for mbid.
What a dufus? :|
P.S.: #L.B suggested this. More power to him.
I am able to know the sound devices and USB Devices attached to my PC but not getting any way to find Cameras attached to my machine.
Used below code to get Sound Devices
Console.WriteLine("Win32 SoundDevices\r\n===============================");
ManagementObjectSearcher searcher = new ManagementObjectSearcher("Select * from Win32_SoundDevice");
foreach (ManagementObject soundDevice in searcher.Get())
{
//Console.WriteLine("Device found: {0}\n", soundDevice.ToString());
Console.WriteLine("Device found: {0}\n", soundDevice.GetPropertyValue("ProductName"));
}
Console.WriteLine("Search complete.");
I wrote a solution that worked well for me. This method found two USB cameras and an integrated camera on my laptop.
private static async Task ListAllCamerasAsync()
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM win32_PNPEntity WHERE PnPClass='Camera'");
var collection = await Task.Run(() => { return searcher.Get(); });
var cameraIndex = 0;
foreach (ManagementObject cameraDevice in collection)
{
Console.WriteLine($"Camera {cameraIndex}: {cameraDevice["Name"]}");
cameraIndex++;
}
}
This tool will prove helpful:
http://www.microsoft.com/en-us/download/details.aspx?id=8572
I'm fairly certain there's no equivalent string you can send to ManagementObjectSearcher() for webcams specifically. There is the "Win32_USBControllerDevice" which you can then determine if it is a webcam or not.
A better solution altogether is to take advantage of DirectShow.NET
I am trying to search for all available sound input and outut devices and adding their names into a ComboBox.
I am using this code (found here at stackoverflow in a similiar question):
ManagementObjectSearcher mo = new ManagementObjectSearcher("select * from Win32_SoundDevice");
foreach (ManagementObject soundDevice in mo.Get())
{
string deviceId = soundDevice.GetPropertyValue("DeviceId").ToString();
string name = soundDevice.GetPropertyValue("Name").ToString();
comboBox1.Items.Add(name);
}
But this seems to select all available devices, I need to separate input devices and output devices. Is there a simple way of editing this code, or is there a more sophisticated method needed?
I need to enumerate all user profiles on a local computer and list them in a combo box. Any special accounts need to be filtered out. I'm only concerned about actual user profiles on the computer where the app is running. I have done some searching but I haven't found a clear answer posted anywhere. I did find some code that might work but SelectQuery and ManagementObjectSearcher are displaying errors in VS and I'm not sure what I need to do to make this work.
using System.Management;
SelectQuery query = new SelectQuery("Win32_UserAccount");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
foreach (ManagementObject envVar in searcher.Get())
{
Console.WriteLine("Username : {0}", envVar["Name"]);
}
By saying "SelectQuery and ManagementObjectSearcher are displaying errors" I guess you didn't reference the System.Management dll.
You should right click References in your solution and add System.Management.
Then, with your using statement, the errors should disappear.
Anyway, including the error next time will assist everyone to help you :)
The mentioned code is great but when I tried on a machine connected to a Active Directory Domain all the usernames where returned for the domain. I was able to tweak the code a bit to only return the users that actually have a local directory on the current machine. If a better C# developer can refactor the code to make it cleaner - please help!
var localDrives = Environment.GetLogicalDrives();
var localUsers = new List<string>();
var query = new SelectQuery("Win32_UserAccount") { Condition = "SIDType = 1 AND AccountType = 512" };
var searcher = new ManagementObjectSearcher(query);
foreach (ManagementObject envVar in searcher.Get())
{
foreach (string drive in localDrives)
{
var dir = Path.Combine(String.Format("{0}Users", drive), envVar["name"].ToString());
if (Directory.Exists(dir))
{
localUsers.Add(envVar["name"].ToString());
}
}
}
Once you have the localUsers variable you can set this as the data source to your ComboBox control of our choice.
My C# application sits on the embedded box which has Intel motherboard and graphics chipset. ATI graphics card is put on to PCI express. Generally graphics card drives the video, but if ATI card fails then the video comes out from graphics chipset.
I have to detect the failure of ATI graphics card for diagnostic purposes.
Any ideas/sample code on how to do this.
Thanks in advance
Raju
This should hopefully get you started.
Add a reference to System.Management, then you can do this:
ManagementObjectSearcher searcher
= new ManagementObjectSearcher("SELECT * FROM Win32_DisplayConfiguration");
string graphicsCard = string.Empty;
foreach (ManagementObject mo in searcher.Get())
{
foreach (PropertyData property in mo.Properties)
{
if (property.Name == "Description")
{
graphicsCard = property.Value.ToString();
}
}
}
In my case, graphicsCard is equal to
NVIDIA GeForce 8400 GS (Microsoft
Corporation - WDDM v1.1)
I'm not a fan of how the selected answer only returns the first video controller. Also, there's no need to loop over all the properties. Just get the ones you need. If CurrentBitsPerPixel is not null, then you're looking at one of the active controllers. I'm using Win32_VideoController as suggested by #bairog, instead of the deprecated Win32_DisplayConfiguration.
ManagementObjectSearcher searcher =
new ManagementObjectSearcher("SELECT * FROM Win32_VideoController");
foreach (ManagementObject mo in searcher.Get())
{
PropertyData currentBitsPerPixel = mo.Properties["CurrentBitsPerPixel"];
PropertyData description = mo.Properties["Description"];
if (currentBitsPerPixel != null && description != null)
{
if (currentBitsPerPixel.Value != null)
System.Console.WriteLine(description.Value);
}
}
My machine has 3 video controllers. The first one is not active (ShoreTel). The second one is active, but is not the video card (Desktop Authority). The third one is my NVidia. This code will print out both the DA controller and the NVidia controller.
Promoted answer works only for single video card system. When I have ATI and Nvidia cards - WMI query returns ATI even if that monitor is plugged into Nvidia card, dxdiag shows Nvidia and games runs on that card (usage).
The only way I could determine right video card was using SlimDX to create DX device and examine what card it used. However that .dll weights over 3Mb.
var graphicsCardName = new Direct3D().Adapters[0].Details.Description;
Your question isn't entirely clear, so I'm not sure if the follwing idea will help or not.
Perhaps something very simple would suffice:
If the two graphics cards run different resolutions check the monitor resolution using:
System.Windows.Forms.SystemInformation.PrimaryMonitorSize
Similarly, if one card supports more than one monitor, check the number of monitors using SystemInformation.MonitorCount.
I tried all the approaches in this question but none gives me a correct answer. However I found it possible to get your current using the Win32_DisplayControllerConfiguration class. Although according to MSDN this class is obsolete, it's the only one returning a correct answer:
using System;
using System.Management;
using System.Windows.Forms;
namespace WMISample
{
public class MyWMIQuery
{
public static void Main()
{
try
{
ManagementObjectSearcher searcher =
new ManagementObjectSearcher("root\\CIMV2",
"SELECT * FROM Win32_DisplayControllerConfiguration");
foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine("----------------------------------- ");
Console.WriteLine("Win32_DisplayControllerConfiguration instance");
Console.WriteLine("-----------------------------------");
Console.WriteLine("Name: {0}", queryObj["Name"]);
}
}
catch (ManagementException e)
{
MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
}
}
}
}
(Code generated by WMI Code Creator, a great tool if you are messing with WMI.)
This gives GeForce GTX 1080 on my Windows 10 (RS2) + Intel(R) HD Graphics 4600 + NVIDIA GeForce GTX 1080 system.
Sometimes I need to switch between the Nvidia GPU and onboard GPU. To know which is connected to the monitor, I use the property MinRefreshRate. It works reliably for me, not CurrentBitsPerPixel.
public static void UpdateActiveGpu()
{
ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_VideoController");
foreach (ManagementObject mo in searcher.Get())
{
PropertyData minRefreshRate = mo.Properties["MinRefreshRate"];
PropertyData description = mo.Properties["Description"];
if (minRefreshRate != null && description != null && minRefreshRate.Value != null)
{
Global.Instance.activeGpu = description.Value.ToString();
break;
}
}
}