QT windows平台下获取U盘 QComboBox显示U盘盘符

来源：互联网发布：检测手机硬件的软件编辑：程序博客网时间：2024/05/17 06:16

在windows平台下获取U盘信息，可以调用windows API函数比较方便。本来想用qt QDBusConnection 来写的，网上关于这方面的代码比较多，但按照提示的步骤来写的就是无法编译，我也不知道为什么。如果有知道的朋友，留言给我或者qq 1585519210联系

在windows平台下U盘检测采用windows事件来设计，废话少说，上代码！

#ifndef GETUSBDISKWIDGET_H#define GETUSBDISKWIDGET_H#include <QWidget>#include <windows.h>#include <winbase.h>#include <winnls.h>#include <dbt.h>#include <QCoreApplication>#include <QDebug>#include <QString>#include <QVector>#include <QStringList>namespace Ui {    class GetUsbDiskWidget;}typedef struct USB_DISK_INFO{    QString DirPath;    float TotalMemory;    float FreeMemory;}USB_DISK_INFO;class GetUsbDiskWidget : public QWidget{    Q_OBJECTpublic:    explicit GetUsbDiskWidget(QWidget *parent = 0);    ~GetUsbDiskWidget();    void Init();    void ScanHD();    void AddDisk(QString &DiskName);    void DeleteDisk(QString &DiskName);    bool SearchDisk(QString &DiskName,int &iter);    void GetMemorySize(USB_DISK_INFO & disk);    void AddComboBoxItem(QString &item);    void DeleteComboBoxItem(QString &item);    bool winEvent(MSG *message, long *result);    char FirstDriveFromMask (ULONG unitmask);    USB_DISK_INFO GetCheckedDisk();private:    Ui::GetUsbDiskWidget *ui;      QVector<USB_DISK_INFO> usb_disk_info;    USB_DISK_INFO CurrentUseDisk;private slots:    void on_comboBox_USB_currentIndexChanged(QString );};#endif // GETUSBDISKWIDGET_H

#include "getusbdiskwidget.h"#include "ui_getusbdiskwidget.h"#include <QTextCodec>GetUsbDiskWidget::GetUsbDiskWidget(QWidget *parent) :    QWidget(parent),    ui(new Ui::GetUsbDiskWidget){    QTextCodec::setCodecForCStrings(QTextCodec::codecForName("gb18030"));    QTextCodec::setCodecForLocale(QTextCodec::codecForName("gb18030"));    QTextCodec::setCodecForTr(QTextCodec::codecForName("gb18030"));    ui->setupUi(this);       this->Init();}GetUsbDiskWidget::~GetUsbDiskWidget(){    delete ui;}//=================================================================================//系统初始化//=================================================================================void GetUsbDiskWidget::Init(){   this->ScanHD();   ui->comboBox_USB->clear();   this->usb_disk_info.clear();}//=================================================================================//系统启动扫描已经连接的U盘 程序只会在系统执行时执行一次//=================================================================================void GetUsbDiskWidget::ScanHD(){        qDebug()<<"开机U盘扫描";    char diskPath[5] = { 0 };    DWORD allDisk = GetLogicalDrives(); //返回一个32位整数，将他转换成二进制后，表示磁盘,最低位为A盘    if (allDisk!=0)    {        for (int i=0;i<13;i++)     //假定最多有12个磁盘从A开始计数        {                       if ((allDisk & 1)==1)            {                sprintf( diskPath, "%c", 'A'+i );                strcat( diskPath, ":" );                LPCWSTR RootPathName =(LPCWSTR)QString(diskPath).utf16();                if (GetDriveType(RootPathName) ==  DRIVE_REMOVABLE)                {                                       if( GetVolumeInformation(RootPathName,0,0,0,0,0,0,0) ) //判断驱动是否准备就绪                    {                       qDebug()<<"U盘准备就绪！"<<diskPath;                       QString  path(diskPath);                        this->AddDisk(path);                    }                }            }         allDisk = allDisk>>1;        }     }}//=================================================================================//增加移动设备//=================================================================================void GetUsbDiskWidget::AddDisk(QString &DiskName){    int iter = 0;    if(SearchDisk(DiskName,iter))    {        return ;    }    USB_DISK_INFO usbtemp;    usbtemp.DirPath = DiskName;    GetMemorySize(usbtemp);//获取设备内存信息    this->usb_disk_info.push_back(usbtemp);    this->AddComboBoxItem(DiskName);}//=================================================================================//删除移动设备//=================================================================================void GetUsbDiskWidget::DeleteDisk(QString &DiskName){    int iter = 0;    if(SearchDisk(DiskName,iter))    {        this->usb_disk_info.remove(iter);        this->DeleteComboBoxItem(DiskName);    }}//=================================================================================//搜索移动设备//=================================================================================bool GetUsbDiskWidget::SearchDisk(QString &DiskName, int &iter){    for(int i = 0;i < this->usb_disk_info.size();i++)    {        if(usb_disk_info.at(i).DirPath.compare(DiskName) == 0)        {            iter = i;            return true;        }    }    return false;}//=================================================================================//获取设备的内存信息//=================================================================================void GetUsbDiskWidget::GetMemorySize(USB_DISK_INFO &disk){     ULARGE_INTEGER liFreeBytesAvailable, liTotalBytes, liTotalFreeBytes;    LPCWSTR lpcwstrDriver=(LPCWSTR)disk.DirPath.utf16();    if( !GetDiskFreeSpaceEx( lpcwstrDriver, &liFreeBytesAvailable, &liTotalBytes, &liTotalFreeBytes) )    {         qDebug() << "ERROR: Call to GetDiskFreeSpaceEx() failed.";         return ;    }    disk.FreeMemory  = (float)liTotalFreeBytes.QuadPart/1024/1024/1024; //剩余内存    disk.TotalMemory = (float)liTotalBytes.QuadPart/1024/1024/1024;     //总内存}//=================================================================================//过滤windows的U盘插入事件//=================================================================================bool GetUsbDiskWidget::winEvent(MSG *message, long *result){    QString DirPath;    int msgType = message->message;    if(msgType == WM_DEVICECHANGE)    {        qDebug()<< "winEvent in MgFrame : WM_DEVICECHANGE" ;        PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)message->lParam;        switch(message->wParam)        {        case DBT_DEVICEARRIVAL:            if (lpdb -> dbch_devicetype == DBT_DEVTYP_VOLUME)            {                PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;                if (lpdbv -> dbcv_flags == 0)                {                    //插入U盘，获取盘符                    DirPath = QString(this->FirstDriveFromMask(lpdbv ->dbcv_unitmask));                    DirPath += ":";                    this->AddDisk(DirPath);                    qDebug()<<"this->USBDisk Path ="<<DirPath;                }            }            break;         case DBT_DEVICEREMOVECOMPLETE:            if (lpdb -> dbch_devicetype == DBT_DEVTYP_VOLUME)            {                PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;                if (lpdbv -> dbcv_flags == 0)                {                    qDebug() << "USB_Removed";                    DirPath = QString(this->FirstDriveFromMask(lpdbv ->dbcv_unitmask));                    DirPath += ":";                    this->DeleteDisk(DirPath);                    qDebug()<<"this-delete is ="<<DirPath;                }            }            break;        }    }    return false;}//=================================================================================//U盘盘符计算//=================================================================================char GetUsbDiskWidget::FirstDriveFromMask(ULONG unitmask){    char i;    for (i = 0; i < 26; ++i)    {            if (unitmask & 0x1)                    break;            unitmask = unitmask >> 1;    }    return (i + 'A');}//=================================================================================//增加下拉列表选项//=================================================================================void GetUsbDiskWidget::AddComboBoxItem(QString &item){    QStringList ComboboxList = QStringList()<<item;    //ComboboxList<<item;    ui->comboBox_USB->addItems(ComboboxList);}//=================================================================================//删除下拉列表选项//=================================================================================void GetUsbDiskWidget::DeleteComboBoxItem(QString &item){    int i = ui->comboBox_USB->findText(item);    ui->comboBox_USB->removeItem(i);}//=================================================================================//下拉列表选项发生改变//=================================================================================void GetUsbDiskWidget::on_comboBox_USB_currentIndexChanged(QString e){    qDebug()<<" this is test changed ="<<e;    int iter;    if(this->SearchDisk(e,iter))    {        this->CurrentUseDisk = this->usb_disk_info.at(iter);    }}//=================================================================================//获取下拉列表当前选定的U盘//=================================================================================USB_DISK_INFO GetUsbDiskWidget::GetCheckedDisk(){    return this->CurrentUseDisk;}

#include <QtGui/QApplication>#include "getusbdiskwidget.h"int main(int argc, char *argv[]){    QApplication a(argc, argv);    GetUsbDiskWidget w;    w.show();    return a.exec();}