usb 识别代码,CSharp代码库,德仔网

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【CSharp】 usb 识别
作者:dezai / 发布于2014/2/21/ 504
 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.Runtime.InteropServices;
namespace USB
{
  public partial class USB : Form
  {
    public USB()
    {
      InitializeComponent();
    }
    public const int WM_DEVICECHANGE = 0x219;
    public const int DBT_DEVICEARRIVAL = 0x8000;
    public const int DBT_CONFIGCHANGECANCELED = 0x0019;
    public const int DBT_CONFIGCHANGED = 0x0018;
    public const int DBT_CUSTOMEVENT = 0x8006;
    public const int DBT_DEVICEQUERYREMOVE = 0x8001;
    public const int DBT_DEVICEQUERYREMOVEFAILED = 0x8002;
    public const int DBT_DEVICEREMOVECOMPLETE = 0x8004;
    public const int DBT_DEVICEREMOVEPENDING = 0x8003;
    public const int DBT_DEVICETYPESPECIFIC = 0x8005;
    public const int DBT_DEVNODES_CHANGED = 0x0007;
    public const int DBT_QUERYCHANGECONFIG = 0x0017;
    public const int DBT_USERDEFINED = 0xFFFF;
    // 逻辑卷标
    public const int DBT_DEVTYP_VOLUME = 0x00000002;
   // private LockScreen Ls = new LockScreen();
    public string ID="";
    public string Value;
    public string[] item;

    [StructLayout(LayoutKind.Sequential)]
    public struct DEV_BROADCAST_VOLUME
    {
      public int dbcv_size;
      public int dbcv_devicetype;
      public int dbcv_reserved;
      public int dbcv_unitmask;
    }



    protected override void WndProc(ref Message m)
    {
      try
      {
        if (m.Msg == WM_DEVICECHANGE)
        {
          switch (m.WParam.ToInt32())
          {
            case WM_DEVICECHANGE:
              break;
            case DBT_DEVICEARRIVAL://U盘有插入
              this.timer1.Enabled = true;
              DriveInfo[] s = DriveInfo.GetDrives();
              foreach (DriveInfo DriveI in s)
              {
                if (DriveI.DriveType == DriveType.Removable)
                {
                 // Ls.Show();
                 // this.Hide();
                 // MessageBox.Show("sss");
                 
                  break;
                }
                int devType = Marshal.ReadInt32(m.LParam, 4);
                if (devType == DBT_DEVTYP_VOLUME)
                {
                  DEV_BROADCAST_VOLUME vol;
                  vol = (DEV_BROADCAST_VOLUME)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_VOLUME));
                  ID=vol.dbcv_unitmask.ToString("x");
                  this.Text = IO(ID);
                 this.Tag = IO(ID);
                 //if (item.Length ==0||IO(ID)!=this.Tag.ToString ())
                 //{
                  
                 //}
                }
                this.label1.Text = this.Text;
              }
              break;
            case DBT_CONFIGCHANGECANCELED:
              break;
            case DBT_CONFIGCHANGED:
              break;
            case DBT_CUSTOMEVENT:
              break;
            case DBT_DEVICEQUERYREMOVE:
              break;
            case DBT_DEVICEQUERYREMOVEFAILED:
              break;
            case DBT_DEVICEREMOVECOMPLETE: //U盘卸载
              DriveInfo[] I = DriveInfo.GetDrives();
              foreach (DriveInfo DrInfo in I)
              {
                int devType = Marshal.ReadInt32(m.LParam, 4);
                if (devType == DBT_DEVTYP_VOLUME)
                {
                  DEV_BROADCAST_VOLUME vol;
                  vol = (DEV_BROADCAST_VOLUME)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_VOLUME));
                  ID = vol.dbcv_unitmask.ToString("x");
                  this.Text = IO(ID) + "盘退出！\n";
                 
                 
                }
                this.label1.Text += this.Text;
               // MessageBox.Show("U盘已经卸载", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
              }
              break;
            case DBT_DEVICEREMOVEPENDING:
              break;
            case DBT_DEVICETYPESPECIFIC:
              break;
            case DBT_DEVNODES_CHANGED:
              break;
            case DBT_QUERYCHANGECONFIG:
              break;
            case DBT_USERDEFINED:
              break;
            default:
              break;
          }
        }
      }
      catch (Exception ex)
      {
        throw new Exception(ex.Message);
      }
      base.WndProc(ref m);
    }

    private void USB_Load(object sender, EventArgs e)
    {
     
    }
    public string IO(string ff)
           {
             switch (ff)
             {
               case "1":
                Value="A:";
                break;
               case "2":
                 Value= "B:";
                 break;
               case "4":
                 Value= "C:";
                 break;
               case "8":
                 Value= "D:";
                 break;
               case "10":
                 Value= "E:";
                 break;
               case "20":
                 Value= "F:";
                 break;
               case "40":
                 Value= "G:";
                 break;
               case "80":
                 Value= "H:";
                 break;
               case "100":
                 Value= "I:";
                 break;
               case "200":
                 Value= "J:";
                 break;
               case "400":
                 Value= "K:";
                 break;
               case "800":
                 Value= "L:";
                 break;
               case "1000":
                 Value= "M:";
                 break;
               case "2000":
                 Value= "N:";
                 break;
               case "4000":
                 Value= "O:";
                 break;
               case "8000":
                 Value= "P:";
                 break;
               case "10000":
                 Value= "Q:";
                 break;
               case "20000":
                 Value= "R:";
                 break;
               case "40000":
                 Value= "S:";
                 break;
               case "80000":
                 Value= "T:";
                 break;
               case "100000":
                 Value= "U:";
                 break;
               case "200000":
                 Value= "V:";
                 break;
               case "400000":
                 Value= "W:";
                 break;
               case "800000":
                 Value= "X:";
                 break;
               case "1000000":
                 Value= "Y:";
                 break;
               case "2000000":
                 Value= "Z:";
                 break;
               default: break;
             }
             return Value;
     }






    private void timer1_Tick(object sender, EventArgs e)
    {
     // this.Text = ID;
    }

    private void USB_Load_1(object sender, EventArgs e)
    {

    }
  }
}
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