find out when a removal device connected? [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so 开发者_JAVA百科that it can be reopened, visit the help center. Closed 12 years ago.

How to find if a removal device connected to system and give it's name ?

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I am assuming you meant removable device.

Here is some code that can be modified to accommodate your needs.

using System;
using System.Collections.Generic;
using System.Text;
using System.Management;

namespace DeviceMonitor.Event
{
 /// <summary>Media watcher delegate.</summary>
 /// <param name="sender"></param>
 /// <param name="driveStatus"></param>
 public delegate void MediaWatcherEventHandler( object sender, DeviceMonitor.Event.MediaEvent.DriveStatus driveStatus );
 /// <summary>Class to monitor devices.</summary>
 public class MediaEvent
 {
  #region Variables

  /*------------------------------------------------------------------------*/
  private string m_logicalDrive;
  private ManagementEventWatcher m_managementEventWatcher = null;
  /*------------------------------------------------------------------------*/
  #endregion

  #region Events
  /*------------------------------------------------------------------------*/
  public event MediaWatcherEventHandler MediaWatcher;
  /*------------------------------------------------------------------------*/
  #endregion


  #region Enums
  /*------------------------------------------------------------------------*/
  /// <summary>The drive types.</summary>
  public enum DriveType
  {
   Unknown = 0,
   NoRootDirectory = 1,
   RemoveableDisk  = 2,
   LocalDisk       = 3,
   NetworkDrive    = 4,
   CompactDisk     = 5,
   RamDisk         = 6
  }

  /// <summary>The drive status.</summary>
  public enum DriveStatus
  {
   Unknown  = -1,
   Ejected  = 0,
   Inserted = 1,
  }
  /*-----------------------------------------------------------------------*/
  #endregion


  #region Monitoring
  /*-----------------------------------------------------------------------*/
  /// <summary>Starts the monitoring of device.</summary>
  /// <param name="path"></param>
  /// <param name="mediaEvent"></param>
  public void Monitor( string path, MediaEvent mediaEvent ) {
   if( null == mediaEvent ) {
    throw new ArgumentException( "Media event cannot be null!" );
   }

   //In case same class was called make sure only one instance is running
   /////////////////////////////////////////////////////////////
   this.Exit();

   //Keep logica drive to check
   /////////////////////////////////////////////////////////////
   this.m_logicalDrive = this.GetLogicalDrive( path );

   WqlEventQuery wql;
   ManagementOperationObserver observer = new
       ManagementOperationObserver();

   //Bind to local machine
   /////////////////////////////////////////////////////////////
   ConnectionOptions opt = new ConnectionOptions();

   //Sets required privilege
   /////////////////////////////////////////////////////////////
   opt.EnablePrivileges = true;
   ManagementScope scope = new ManagementScope( "root\\CIMV2", opt );

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

    wql.Condition = String.Format( @"TargetInstance ISA 'Win32_LogicalDisk' and TargetInstance.DeviceId = '{0}'", this.m_logicalDrive );
    this.m_managementEventWatcher = new ManagementEventWatcher( scope, wql );

    //Register async. event handler
    /////////////////////////////////////////////////////////////
    this.m_managementEventWatcher.EventArrived += new EventArrivedEventHandler( mediaEvent.MediaEventArrived );
    this.m_managementEventWatcher.Start();
   } catch( Exception e ) {
    this.Exit();
    throw new Exception( "Media Check: "  + e.Message );
   }
  }

  /// <summary>Stops the monitoring of device.</summary>
  public void Exit( ) {
   //In case same class was called make sure only one instance is running
   /////////////////////////////////////////////////////////////
   if( null != this.m_managementEventWatcher ) {
    try {
     this.m_managementEventWatcher.Stop();
     this.m_managementEventWatcher = null;
    } catch {
    }
   }
  }
  /*-----------------------------------------------------------------------*/
  #endregion


  #region Helpers
  /*-----------------------------------------------------------------------*/

  private DriveStatus m_driveStatus = DriveStatus.Unknown;
  /// <summary>Triggers the event when change on device occured.</summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void MediaEventArrived( object sender, EventArrivedEventArgs e ) {
   // Get the Event object and display it
   PropertyData pd = e.NewEvent.Properties["TargetInstance"];
   DriveStatus driveStatus = this.m_driveStatus;
   if( pd != null ) {
    ManagementBaseObject mbo = pd.Value as ManagementBaseObject;
    System.IO.DriveInfo info = new System.IO.DriveInfo( (string)mbo.Properties["DeviceID"].Value );
    driveStatus = info.IsReady ? DriveStatus.Inserted : DriveStatus.Ejected;
   }

   if( driveStatus != this.m_driveStatus ){
    this.m_driveStatus = driveStatus;
    if( null != MediaWatcher ) {
     MediaWatcher( sender, driveStatus );
    }
   }
  }


  /// <summary>Gets the logical drive of a given path.</summary>
  /// <param name="path"></param>
  /// <returns></returns>
  private string GetLogicalDrive( string path ) {
   System.IO.DirectoryInfo dirInfo = new System.IO.DirectoryInfo( path );
   string root = dirInfo.Root.FullName;
   string logicalDrive = root.Remove( root.IndexOf( System.IO.Path.DirectorySeparatorChar ) );
   return logicalDrive;
  }
  /*-----------------------------------------------------------------------*/
  #endregion
 }
}

I found this on MSDN at: http://social.msdn.microsoft.com/forums/en-US/csharpgeneral/thread/09912cee-4d2d-4efd-82a0-da20024b868b/