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【CSharp】 USB 通讯
作者:涵 / 发布于2014/11/3/ 878

	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.IO;
	namespace USB
	{
	 public partial class Form1 : Form
	 {
	 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;

	 public Form1()
	 {
	 InitializeComponent();
	 }
	 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盘插入
	 DriveInfo[] s = DriveInfo.GetDrives();
	 foreach (DriveInfo drive in s)
	 {
	 if (drive.DriveType == DriveType.Removable)
	 {
	 listBox1.Items.Add("U盘已插入，盘符为:" + drive.Name.ToString());
	 break;
	 }
	 }
	 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
	 listBox1.Items.Add("U盘卸载:" );
	 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)
	 {
	 MessageBox.Show(ex.Message);
	 }
	 base.WndProc(ref m);
	 }

	 private void button1_Click(object sender, EventArgs e)
	 {
	 DriveInfo[] s = DriveInfo.GetDrives();
	 listBox1.Items.Clear();
	 foreach (DriveInfo drive in s)
	 {
	 if (drive.DriveType == DriveType.Removable)
	 {
	 listBox1.Items.Add("Uxxx插入，盘符为:" + drive.Name.ToString());
	
	 }
	 if (drive.DriveType == DriveType.CDRom)
	 {
	 listBox1.Items.Add("Uxyyx插入，盘符为:" + drive.Name.ToString());
	 }
	 }
	
	 }
	 }
	}
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