Detect CD-ROM Insertion in a WinForm Application

Question

Hi,

How can I alter the c# code below so that I can use it in a WinForm application.

using System;
using System.Management;
 
namespace CDROMManagement
{
  class WMIEvent
  {
    static void Main(string[] args)
    {
      WMIEvent we = new WMIEvent();
      ManagementEventWatcher w = null;
      WqlEventQuery q;
      ManagementOperationObserver observer = new
          ManagementOperationObserver();
 
      // Bind to local machine
      ConnectionOptions opt = new ConnectionOptions();
      opt.EnablePrivileges = true; //sets required privilege
      ManagementScope scope = new ManagementScope( "root\\CIMV2", opt );
 
      try
      {
        q = new WqlEventQuery();
        q.EventClassName = "__InstanceModificationEvent";
        q.WithinInterval = new TimeSpan( 0, 0, 1 );
 
        // DriveType - 5: CDROM
        q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and
            TargetInstance.DriveType = 5";
        w = new ManagementEventWatcher( scope, q );
 
        // register async. event handler
        w.EventArrived += new EventArrivedEventHandler( we.CDREventArrived );
        w.Start();
 
        // Do something usefull,block thread for testing
        Console.ReadLine();
      }
      catch( Exception e )
      {
        Console.WriteLine( e.Message );
      }
      finally
      {
        w.Stop();
      }
    }
 
    // Dump all properties
    public void CDREventArrived(object sender, EventArrivedEventArgs e)
    {
      // Get the Event object and display it
      PropertyData pd = e.NewEvent.Properties["TargetInstance"];
 
      if (pd != null)
      {
        ManagementBaseObject mbo = pd.Value as ManagementBaseObject;
 
        // if CD removed VolumeName == null
        if (mbo.Properties["VolumeName"].Value != null)
        {
          Console.WriteLine("CD has been inserted");
        }
        else
        {
          Console.WriteLine("CD has been ejected");
        }
      }
    }
  }
}
http://en.csharp-online.net/Detect%5FCD-ROM%5FInsertion

Answer 1

Hi,

You can use this method in a windows form like below.

Don't forget to add System.Management to your project as a reference.

And don't forget to hook Form load and Form closing events.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.Threading;
using System.Management;

namespace WindowsFormsApplication1
{
    public partial class Form6 : Form
    {
        public Form6()
        {
            InitializeComponent();
        }
        ManagementEventWatcher w = null;
        private void Form6_Load(object sender, EventArgs e)
        {


            WqlEventQuery q;
            ManagementOperationObserver observer = new ManagementOperationObserver();

            // Bind to local machine
            ConnectionOptions opt = new ConnectionOptions();
            opt.EnablePrivileges = true; //sets required privilege
            ManagementScope scope = new ManagementScope("root\\CIMV2", opt);

            try
            {
                q = new WqlEventQuery();
                q.EventClassName = "__InstanceModificationEvent";
                q.WithinInterval = new TimeSpan(0, 0, 1);

                // DriveType - 5: CDROM
                q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";
                w = new ManagementEventWatcher(scope, q);

                // register async. event handler
                w.EventArrived += new EventArrivedEventHandler(this.CDREventArrived);
                w.Start();

                // Do something usefull,block thread for testing

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }

        }
        public void CDREventArrived(object sender, EventArrivedEventArgs e)
        {
            // Get the Event object and display it
            PropertyData pd = e.NewEvent.Properties["TargetInstance"];

            if (pd != null)
            {
                ManagementBaseObject mbo = pd.Value as ManagementBaseObject;

                // if CD removed VolumeName == null
                if (mbo.Properties["VolumeName"].Value != null)
                {
                    MessageBox.Show("CD has been inserted");
                }
                else
                {
                    MessageBox.Show("CD has been ejected");
                }
            }

        }

        private void Form6_FormClosing(object sender, FormClosingEventArgs e)
        {
            w.Stop();
        }
    }
}

Answer 2

Thank you Tamer, I'm trying to run media player and then get the attritutes in the section of the code below from the above, only the first two instrutions run but the 3rd one doesn't what can I do to make it work?

// if CD removed VolumeName == null
if (mbo.Properties["VolumeName"].Value != null)
{

MessageBox.Show("CD has been inserted"); //1

axWindowsMediaPlayer1.URL = @"C:\music.wma"; //2

textBox1.Text = "Name: " + axWindowsMediaPlayer1.currentMedia.getItemInfo( "Name"); //3

}

Answer 3

Hi,

How is playing a media using windows media player control from c drive is related to cd-rom status detection?

And

What's do you ment it doesn't work. Does it throws exceptions?

COuld you share the full code, it would be easier to help.

Answer 4

Thanks Tamer, please see full code below. Media Player plays the music on the cd rom when a disk is inserted but the instruction to retrive the music info does not work.

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.IO;

using System.Windows.Forms;

using System.Threading;

using WMPLib;

using AxWMPLib;

using System.Management;

namespace WindowsApplication1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

ManagementEventWatcher w = null;

private void Form1_Load(object sender, EventArgs e)

{

WqlEventQuery q;

ManagementOperationObserver observer = new ManagementOperationObserver();

// Bind to local machine

ConnectionOptions opt = new ConnectionOptions();

opt.EnablePrivileges = true; //sets required privilege

ManagementScope scope = new ManagementScope("root\\CIMV2", opt);

try

{

q = new WqlEventQuery();

q.EventClassName = "__InstanceModificationEvent";

q.WithinInterval = new TimeSpan(0, 0, 1);

// DriveType - 5: CDROM

q.Condition = @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DriveType = 5";

w = new ManagementEventWatcher(scope, q);

// register async. event handler

w.EventArrived += new EventArrivedEventHandler(this.CDREventArrived);

w.Start();

// Do something usefull,block thread for testing

}

catch (Exception ex)

{

MessageBox.Show(ex.ToString());

}

}

public void CDREventArrived(object sender, EventArrivedEventArgs e)

{

// Get the Event object and display it

PropertyData pd = e.NewEvent.Properties["TargetInstance"];

if (pd != null)

{

ManagementBaseObject mbo = pd.Value as ManagementBaseObject;

// if CD removed VolumeName == null

if (mbo.Properties["VolumeName"].Value != null)

{

 

MessageBox.Show("CD has been inserted"); //1

axWindowsMediaPlayer1.URL = "CD Rom Drive"; //2

textBox1.Text = "Name: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Name"); //3

 

}

else

{

MessageBox.Show("CD has been ejected");

}

}

}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)

{

w.Stop();

}

}

}

Answer 5

Hi,

I think you are trying to make windows media player component to run automatic in cd insertion.

You don't have to use wmi for this.

Just hook up to CdRomMediaChanged event of axwindowsmediaplayer1.

Here is a sample.

        private void axWindowsMediaPlayer1_CdromMediaChange(object sender, AxWMPLib._WMPOCXEvents_CdromMediaChangeEvent e)
        {
            axWindowsMediaPlayer1.currentPlaylist=axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;
            axWindowsMediaPlayer1.Ctlcontrols.play();
            this.Text=axWindowsMediaPlayer1.currentMedia.getItemInfo("Name");
        }

Answer 6

Thanks for your help Tamer,

Please how do I use the above code in my program? I have tried it like below, but nothing happens:

using

 

System;

using

 

System.Collections.Generic;

using

 

System.ComponentModel;

using

 

System.Data;

using

 

System.Drawing;

using

 

System.Text;

using

 

System.IO;

using

 

System.Windows.Forms;

using

 

System.Threading;

using

 

WMPLib;

using

 

AxWMPLib;

namespace

 

CdRomMediaChangedEvent

{

 

public partial class Form1 : Form

{

 

public Form1()

{

InitializeComponent();

}

 

private void axWindowsMediaPlayer1_CdromMediaChange(object sender, AxWMPLib._WMPOCXEvents_CdromMediaChangeEvent e)

{

axWindowsMediaPlayer1.currentPlaylist = axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;

axWindowsMediaPlayer1.Ctlcontrols.play();

 

this.Text = axWindowsMediaPlayer1.currentMedia.getItemInfo("Name");

}

 

}

}

Answer 7

Put a Windows Media Player Control on your form. From the properties windows click events icon and go to CdRomMediaChanged event and double click.

You should be seeing the method in cs file now.

Write the code below into that method.

axWindowsMediaPlayer1.currentPlaylist = axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;

axWindowsMediaPlayer1.Ctlcontrols.play();

this.Text = axWindowsMediaPlayer1.currentMedia.getItemInfo("Name"); 
<br/>

Or change the code above like this.

        public Form1()
        {

            InitializeComponent();
            axWindowsMediaPlayer1.CdromMediaChange+=new AxWMPLib._WMPOCXEvents_CdromMediaChangeEventHandler(axWindowsMediaPlayer1_CdromMediaChange);

        }




        private void axWindowsMediaPlayer1_CdromMediaChange(object sender, AxWMPLib._WMPOCXEvents_CdromMediaChangeEvent e)
        {

            axWindowsMediaPlayer1.currentPlaylist = axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;

            axWindowsMediaPlayer1.Ctlcontrols.play();




            this.Text = axWindowsMediaPlayer1.currentMedia.getItemInfo("Name");

        }

Answer 8

It is working. Thank you very much Tamer.

Answer 9

Hi Tamer,

Is there a way I can put media player on a WebForm? I can only see media player on the ToolBox on a WinForm application. I tried using Windows Control Library but it won't allow me to add it to the toolbox on a WebForm. 

Answer 10

Since it's related to asp.net you can ask your question at http://forums.asp.net

Here is a thread about your questions.

http://forums.asp.net/t/1134158.aspx

By the way if your question is answered, asking totally different question in a same thread is not a good thing for people searching answers future.

Answer 11

Thanks Tamer for your quick response. I will follow your advice in the future.

Answer 12

Hi Tamer, The CdRomMediaChanged event was  getting the getItemInfo values at first now for reasons I cannot understand the getItemInfo values are not being displayed anymore. What could have gone wrong? Please help. 

using

System;

using

System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

namespace CdRomManagement

{

public partial class Form1 : Form

{ 

public Form1()

{

InitializeComponent();

} 

private void axWindowsMediaPlayer1_CdromMediaChange(object sender, AxWMPLib._WMPOCXEvents_CdromMediaChangeEvent

e)

{

axWindowsMediaPlayer1.currentPlaylist = axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;

axWindowsMediaPlayer1.Ctlcontrols.play();

//this.textBox1.Text = axWindowsMediaPlayer1.currentMedia.getItemInfo("Name");

this.textBox1.Text = "Name: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Name") + Environment.NewLine;

this.textBox1.Text += "author: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("author") + Environment.NewLine;

this.textBox1.Text += "Title: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Title") + Environment.NewLine;

this.textBox1.Text += "Album: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Album") + Environment.NewLine;

this.textBox1.Text += "copyright: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("copyright") + Environment.NewLine;

this.textBox1.Text += "Artist: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Artist") + Environment.NewLine;

this.textBox1.Text += "Genre: " + axWindowsMediaPlayer1.currentMedia.getItemInfo("Genre") + Environment.NewLine;

}

}

}

 

 

 

 

 

 

Answer 13

I'm desperate for a solution to the problem above, I need someone to help me.

Answer 14

Hi,

Put the code below to your forms contructor after the InitializeComponent line.

  axWindowsMediaPlayer1.CdromMediaChange+=new AxWMPLib._WMPOCXEvents_CdromMediaChangeEventHandler(axWindowsMediaPlayer1_CdromMediaChange);

Answer 15

Thanks Tamer, I have tried the above in the code below but still getItemInfo("Genre") is not returning any string

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using WMPLib;
using AxWMPLib;

namespace CdRomManagement
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            axWindowsMediaPlayer1.CdromMediaChange += new AxWMPLib._WMPOCXEvents_CdromMediaChangeEventHandler(axWindowsMediaPlayer1_CdromMediaChange);
        }

        private void axWindowsMediaPlayer1_CdromMediaChange(object sender, AxWMPLib._WMPOCXEvents_CdromMediaChangeEvent e)
        {
            axWindowsMediaPlayer1.currentPlaylist = axWindowsMediaPlayer1.cdromCollection.Item(e.cdromNum).Playlist;

            axWindowsMediaPlayer1.Ctlcontrols.play();     
    
            this.textBox1.Text = axWindowsMediaPlayer1.currentMedia.getItemInfo("Genre");

   

        }
    }
}

Answer 16

Please Tamer is there anything else I can try.

Answer 17

If all other properties are working ok but genre is not I think the media does not have any genre attribute set,

Could you try this code, and see if genre there. If not I think I'll stick with the first answer.

IWMPMedia media = axWindowsMediaPlayer1.currentMedia;
    lblMediaInfo.Text = "Süre (Saniye): " + media.duration.ToString() + "\r\nSüre: " + media.durationString + "\r\nDosya Yolu: " + media.sourceURL;
    for (int i = 0; i < media.attributeCount; i++)
    {
        textBox1.Text += media.getAttributeName(i) + ":" +  media.getItemInfo(lvi.Text) +Environment.NewLine;
    }

Answer 18

Hi Tamer, I'll try the above.