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检测u盘插拔状态并读写的方法新
本文来介绍一下,利用VB.Net检测U盘插拔状态并读写的方法
代码如下:
Imports?System.IOPublic?Class?Form1????Public?Const?WM_DEVICECHANGE?=?&H219????Public?Const?DBT_DEVICEARRIVAL?=?&H8000????Public?Const?DBT_CONFIGCHANGECANCELED?=?&H19????Public?Const?DBT_CONFIGCHANGED?=?&H18????Public?Const?DBT_CUSTOMEVENT?=?&H8006????Public?Const?DBT_DEVICEQUERYREMOVE?=?&H8001????Public?Const?DBT_DEVICEQUERYREMOVEFAILED?=?&H8002????Public?Const?DBT_DEVICEREMOVECOMPLETE?=?&H8004????Public?Const?DBT_DEVICEREMOVEPENDING?=?&H8003????Public?Const?DBT_DEVICETYPESPECIFIC?=?&H8005????Public?Const?DBT_DEVNODES_CHANGED?=?&H7????Public?Const?DBT_QUERYCHANGECONFIG?=?&H17????Public?Const?DBT_USERDEFINED?=?&HFFFF????Protected?Overrides?Sub?WndProc(ByRef?m?As?System.Windows.Forms.Message)????????If?m.Msg?=?WM_DEVICECHANGE?Then????????????Select?Case?m.WParam????????????????Case?WM_DEVICECHANGE????????????????Case?DBT_DEVICEARRIVAL?'U盘插入????????????????????ComboBox1.Items.Clear()????????????????????Dim?s()?As?DriveInfo?=?DriveInfo.GetDrives????????????????????For?Each?drive?As?DriveInfo?In?s????????????????????????If?drive.DriveType?=?DriveType.Removable?Then????????????????????????????ListBox1.Items.Add("U盘已插入!盘符为:"?+?drive.Name.ToString())????????????????????????????ComboBox1.Items.Add(drive.Name)????????????????????????End?If????????????????????Next????????????????????BtnWrite.Enabled?=?True????????????????????BtnRead.Enabled?=?True????????????????Case?DBT_CONFIGCHANGECANCELED????????????????Case?DBT_CONFIGCHANGED????????????????Case?DBT_CUSTOMEVENT????????????????Case?DBT_DEVICEQUERYREMOVE????????????????Case?DBT_DEVICEQUERYREMOVEFAILED????????????????Case?DBT_DEVICEREMOVECOMPLETE?'U盘卸载????????????????????ListBox1.Items.Add("U盘卸载!")????????????????????BtnWrite.Enabled?=?False????????????????????BtnRead.Enabled?=?False????????????????Case?DBT_DEVICEREMOVEPENDING????????????????Case?DBT_DEVICETYPESPECIFIC????????????????Case?DBT_DEVNODES_CHANGED????????????????Case?DBT_QUERYCHANGEC
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