C#识别U盘和盘符
2012-02-12 09:25
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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; } } }
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