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目录

基本概念

知识点如下：

CreateToolhelp32Snapshot    获取当前系统进程快照

void Thread::getSnapshot(){    HANDLE hProcess = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);    if(!hProcess){        qDebug() << "CreateToolhelp32Snapshot failed!";        return;    }    PROCESSENTRY32 info;    info.dwSize = sizeof(PROCESSENTRY32);    if(!Process32First(hProcess, &info)){        qDebug() << "Process32First null";        return;    }    bool haveNext = true;    while(haveNext){        haveNext = Process32Next(hProcess, &info);        if(haveNext){            HANDLE hProcess = OpenProcess(PROCESS_ALL_ACCESS, TRUE, info.th32ProcessID);            insertInfo(QString::number(info.th32ProcessID), QString::number(info.cntUsage),                       QString::number(info.th32ParentProcessID), QString::number(info.pcPriClassBase),                       QString::number((DWORD)hProcess), QString::fromWCharArray(info.szExeFile));//            qDebug() << info.th32ProcessID << "  " << info.pcPriClassBase << "  " << QString::fromWCharArray(info.szExeFile) << "  " << hProcess;        }    }//    qDebug() << "Over!";}

通过此方式获取当前系统的进程信息

另外一个是关于QTableWidget相关设置：

QStringList headList;    headList << "进程ID" << "     进程名     " << "父类进程ID" << "进程句柄" << "优先级";    ui->tableWidget->setColumnCount(5);    ui->tableWidget->setHorizontalHeaderLabels(headList);//    ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);    ui->tableWidget->setColumnWidth(1, 150);    ui->tableWidget->horizontalHeader()->setStretchLastSection(true);    ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);    ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);    ui->tableWidget->setShowGrid(false);

设置表头数据，以及最后一列填充，以及不可编辑，以及设置每一项Stretch

代码与实例

程序运行截图如下：

上面那有一部分关键代码。

下面给出补充的关键代码：

#include "widget.h"#include "ui_widget.h"#include "thread.h"#include 
   
    #include 
    
     Widget::Widget(QWidget *parent) :    QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    m_thread = new Thread;    QStringList headList;    headList << "进程ID" << "     进程名     " << "父类进程ID" << "进程句柄" << "优先级";    ui->tableWidget->setColumnCount(5);    ui->tableWidget->setHorizontalHeaderLabels(headList);//    ui->tableWidget->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);    ui->tableWidget->setColumnWidth(1, 150);    ui->tableWidget->horizontalHeader()->setStretchLastSection(true);    ui->tableWidget->setSelectionBehavior(QAbstractItemView::SelectRows);    ui->tableWidget->setEditTriggers(QAbstractItemView::NoEditTriggers);    ui->tableWidget->setShowGrid(false);    startTimer(1000);}Widget::~Widget(){    delete ui;    delete m_thread;}void Widget::addNew(){    QVector
     
       vec = m_thread->getVec();    for(ProcessInfo info : vec){        bool have = false;        for(int i = 0; i < ui->tableWidget->rowCount(); i++){            if(ui->tableWidget->item(i, 0)->text() == info.processID){               have = true;            }        }        if(!have){            ui->tableWidget->insertRow(0);            ui->tableWidget->setItem(0, 0, new QTableWidgetItem(info.processID));            ui->tableWidget->setItem(0, 1, new QTableWidgetItem(info.processName));            ui->tableWidget->setItem(0, 2, new QTableWidgetItem(info.parentProcessID));            ui->tableWidget->setItem(0, 3, new QTableWidgetItem(info.processHandle));            ui->tableWidget->setItem(0, 4, new QTableWidgetItem(info.processPri));        }    }}void Widget::removeOld(){    QVector
      
        vec = m_thread->getVec();    for(int i = 0; i < ui->tableWidget->rowCount(); i++){        bool have = false;        for(ProcessInfo info : vec){            if(info.processID == ui->tableWidget->item(i, 0)->text()){                have = true;                continue;            }        }        if(!have){            ui->tableWidget->removeRow(i);        }    }}void Widget::timerEvent(QTimerEvent *event){    Q_UNUSED(event)    m_thread->clearVec();    m_thread->getSnapshot();    addNew();    removeOld();}
      
     
    
   

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