Qt：小的任务管理器（task）

 1.widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <windows.h>
#include <tlhelp32.h>
#include <QTableWidget>
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
public:
    void showProcess();
private slots:
    void on_pushButton_clicked();

private:
    Ui::Widget *ui;
};
#endif // WIDGET_H

2.widget.cpp

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    ui->tableWidget->setSelectionMode(QTableWidget::SingleSelection);
    ui->tableWidget->setSelectionBehavior(QTableWidget::SelectRows);
    showProcess();
}

Widget::~Widget()
{
    delete ui;
}

void Widget::showProcess()
{
    //获取进程信息的链表
    HANDLE hsnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if(hsnapShot == INVALID_HANDLE_VALUE)return;
    //获取链表的头
    PROCESSENTRY32 pe;
    pe.dwSize = sizeof(PROCESSENTRY32);
    BOOL bFlag = Process32First(hsnapShot,&pe);
    QString str;
    int i = 0;
    while(bFlag)
    {
        str = QString::fromWCharArray(pe.szExeFile);
        ui->tableWidget->setItem(i,0,new QTableWidgetItem(str));
        str = QString::number(pe.th32ProcessID);
        ui->tableWidget->setItem(i,1,new QTableWidgetItem(str));
        str = QString::number(pe.cntThreads);
        ui->tableWidget->setItem(i,2,new QTableWidgetItem(str));
         //遍历链表
        bFlag = Process32Next(hsnapShot,&pe);
        i++;
    }
}


void Widget::on_pushButton_clicked()
{
    //获取当前选择项 id
    QList<QTableWidgetItem*> lstitem = ui->tableWidget->selectedItems();
    QTableWidgetItem* pItem = lstitem.front();
    //获取选中行
    int nrow = ui->tableWidget->row(pItem);
    lstitem.pop_front();
    pItem = lstitem.front();
    lstitem.pop_front();
    QString strid = pItem->text();
    if(strid.isEmpty())return;
    //获取句柄
    HANDLE hProcess = OpenProcess(PROCESS_TERMINATE,0,strid.toInt());
    //杀死进程
    if(hProcess)
    {
       TerminateProcess(hProcess,-1);
       ui->tableWidget->removeRow(nrow);
    }

}

3.

 4.输出：