AfxBeginThread的一个例子

最新推荐文章于 2023-03-13 07:31:59 发布

转载最新推荐文章于 2023-03-13 07:31:59 发布 · 343 阅读

文章标签：

#initialization #dialog #多线程 #null #file #function

VC++多线程专栏收录该内容

31 篇文章

订阅专栏

本文介绍了一个使用多线程更新两个进度条的简单示例。通过AfxBeginThread创建线程，并传递结构体参数控制进度条更新速度。每个线程独立更新一个进度条，实现了基本的多线程并发操作。

//这是一个多线程控制进度条的例子，很简单，但是对于初学者掌握多线程的实现方法是非常硬手的。
//重点是AfxBeginThread的用法，
//
//
// MultiThread5Dlg.cpp : implementation file
//
#include "stdafx.h"
#include "MultiThread5.h"
#include "MultiThread5Dlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
struct threadInfo
{
UINT nMilliSecond;
CProgressCtrl* pctrlProgress;//进程指针
};//结构体
threadInfo Info;
threadInfo Info2;//此处增添新进程的定义
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
  // No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMultiThread5Dlg dialog
CMultiThread5Dlg::CMultiThread5Dlg(CWnd* pParent /*=NULL*/)
: CDialog(CMultiThread5Dlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CMultiThread5Dlg)
m_nMilliSecond = 0;
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CMultiThread5Dlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CMultiThread5Dlg)
DDX_Control(pDX, IDC_PROGRESS1, m_ctrlProgress);
  DDX_Control(pDX, IDC_PROGRESS2, m_ctrlProgress2);
DDX_Text(pDX, IDC_MILLISECOND, m_nMilliSecond);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMultiThread5Dlg, CDialog)
//{{AFX_MSG_MAP(CMultiThread5Dlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_START, OnStart)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CMultiThread5Dlg message handlers
BOOL CMultiThread5Dlg::OnInitDialog()
{
CDialog::OnInitDialog();
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
  CString strAboutMenu;
  strAboutMenu.LoadString(IDS_ABOUTBOX);
  if (!strAboutMenu.IsEmpty())
  {
   pSysMenu->AppendMenu(MF_SEPARATOR);
   pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
  }
}

SetIcon(m_hIcon, TRUE);   // Set big icon
SetIcon(m_hIcon, FALSE);  // Set small icon

// TODO: Add extra initialization here
m_ctrlProgress.SetRange(0,99);
m_ctrlProgress2.SetRange(0,99); //确定进度条的范围
m_nMilliSecond=10;
UpdateData(FALSE);

return TRUE;  // return TRUE  unless you set the focus to a control
}
void CMultiThread5Dlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
  CAboutDlg dlgAbout;
  dlgAbout.DoModal();
}
else
{
  CDialog::OnSysCommand(nID, lParam);
}
}

void CMultiThread5Dlg::OnPaint()
{
if (IsIconic())
{
  CPaintDC dc(this); // device context for painting
  SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
  // Center icon in client rectangle
  int cxIcon = GetSystemMetrics(SM_CXICON);
  int cyIcon = GetSystemMetrics(SM_CYICON);
  CRect rect;
  GetClientRect(&rect);
  int x = (rect.Width() - cxIcon + 1) / 2;
  int y = (rect.Height() - cyIcon + 1) / 2;
  // Draw the icon
  dc.DrawIcon(x, y, m_hIcon);
}
else
{
  CDialog::OnPaint();
}
}
HCURSOR CMultiThread5Dlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CMultiThread5Dlg::OnStart()
{
UpdateData(TRUE);
Info.nMilliSecond=m_nMilliSecond;
Info.pctrlProgress=&m_ctrlProgress;

pThread=AfxBeginThread(ThreadFunc,&Info);
////////////////////////////////第二线程开始
Info2.nMilliSecond=m_nMilliSecond;
Info2.pctrlProgress=&m_ctrlProgress2;
pThread=AfxBeginThread(ThreadFunc,&Info2);  // 此处也可以用thradfunc2
}
UINT ThreadFunc(LPVOID lpParam)
{
threadInfo* pInfo=(threadInfo*)lpParam;
for(int i=0;i<100;i++)
{
  int nTemp=pInfo->nMilliSecond;
  pInfo->pctrlProgress->SetPos(i);
  Sleep(nTemp);
}
return 0;
}// 线程的处理方法
UINT ThreadFunc2(LPVOID lpParam)
{
threadInfo* pInfo=(threadInfo*)lpParam;
for(int i=0;i<100;i++)
{
  int nTemp=pInfo->nMilliSecond;

  pInfo->pctrlProgress->SetPos(i);

  Sleep(nTemp);
}
return 0;
}///也可以用上面的那个个函数实现