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小清新IT旅程 | 为中华之崛起而读书

MFC+多线程+进度条+复制文件（夹）

软件开发

发布于：2017年6月15日

次浏览





　　MFC，多线程+进度条+复制文件（夹）小程序。


　　多线程：

  1. 做一个MFC对话框程序。
  2. 点击开始按钮，程序启动一个工作线程，复制指定的文件夹到目标位置。
  3. 同时在更新进度条，反映当前的复制进度（按文件数量计算进度）。
  4. 点击停止按钮时终止，但需要保证当前正在复制的文件得以复制完成。
  5. 工作线程访问主线程需要使用消息机制，不能直接访问。
  6. 主界面不能锁死，停止按钮需要随时可以响应点击。

整体思路：
在开始按钮里的响应函数中创建一个线程，在线程里复制，通过消息机制更新进度条，在消息机制的函数中和复制过程关联显示进度。

需要解决的问题：
1.怎么创建线程
2.怎么更新进度条
3.怎么将编辑框中输入的路径被copyfile函数读取到
4.怎么获取文件个数（遍历）
5.怎么把进度条和复制文件进度关联
（通过文件个数 进度条范围设置为0-文件数量长度 步长为1 完成一次复制加一次）
6.点击取消怎么保证当前正在复制的文件得以复制完成

获取个数：
递归遍历整个文件夹，然后递归复制文件到目的文件夹。
在递归遍历整个文件夹的时候，就可以拿到整个文件夹的大小以及文件数量。

传递进度数据，用postmessage到该进度条的窗口，在进度条窗口获取该消息 设置SetPos，updatedata该控件。
一个对话框里有个进度条控件，当线程接收到数据（文件的总大小和收到的大小）postmessage给对话框，对话框的PreTranslateMessage(MSG* pMsg)截取该消息设置进度条控件（范围和增量，setpos）。

我的方案：
关键代码：

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//复制函数
void CopyDirectory(CString source, CString target, CCopyFoldersDlg * pDlg)    
{
 	 
	CreateDirectory(target,NULL);   
  
    CFileFind finder;    
    CString path;    
    path.Format(_T("%s\\*.*"),source);    
  
    BOOL bWorking = finder.FindFile(path);    
    while (bWorking)  
    {   
        bWorking = finder.FindNextFile();   
           
        if (finder.IsDirectory() && !finder.IsDots())  
        {   
            CopyDirectory(finder.GetFilePath(), target+_T("\\")+finder.GetFileName(), pDlg);  //递归 
        }    
        else  
        {      

			WaitForSingleObject(pDlg->hEvent,INFINITE);

            CopyFile(finder.GetFilePath(), target+_T("\\")+finder.GetFileName(), FALSE);   
            count++;  
            pDlg->PostMessage(WM_USER_PROCESS, count);  
          
  
             Sleep(50);   
        }   
    }    
}

VOID GetInfo(CString csPath, long& FoldersNum, long& FilesNum)  
{     
    SetCurrentDirectory(csPath);  
    CFileFind finder;  
    BOOL bWorking = finder.FindFile(_T("*.*"));  
    while(bWorking)  
    {  
        bWorking = finder.FindNextFile();  
  
        if(finder.IsDots())   
        {  
            continue;  
        }  
        else if(finder.IsDirectory())  
        {  
            ++FoldersNum;  
            GetInfo(finder.GetFilePath(), FoldersNum, FilesNum);  
        }  
        else  
        {  
            ++FilesNum;  
        }  
    }  
      
}  

//复制线程
DWORD WINAPI CCopyFoldersDlg::CopyFolders(LPVOID pParam)
{  
	CCopyFoldersDlg* pDlg = (CCopyFoldersDlg*)pParam;  

	 if (!pDlg) 
	 {
		 return 0;  
	 }
	 ResetEvent(pDlg->hExit);  

	long FoldersNum  = 0;                 
    long FilesNum = 0;                  
    GetInfo(pDlg->m_SrcPath,FoldersNum, FilesNum);  
	pDlg->m_Progress.SetRange(0, FilesNum);  
    pDlg->m_Progress.SetStep(1); 
	CopyDirectory(pDlg->m_SrcPath, pDlg->m_DesPath, pDlg);   

	SetEvent(pDlg->hExit);  
	return 0;
}

LRESULT CCopyFoldersDlg::Do_process(WPARAM wParam, LPARAM lParam)   
{   
   wParam += 1;  
   m_Progress.SetPos(wParam);    
    return 0;  
}         
  



void CCopyFoldersDlg::OnStart() 
{
	UpdateData(true);

	if ((m_SrcPath.IsEmpty() && m_DesPath.IsEmpty()))
	{
		MessageBox("路径不能为空！");
		return;
	}

	else
	{
		//创建线程
		hThread = CreateThread(NULL, 0, CopyFolders, this, 0, NULL);
		hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
		CloseHandle(hThread);
	}
}


void CCopyFoldersDlg::OnStop() 
{
	m_iStatus++;  
         
    if (m_iStatus % 2 == 0)  
    {    
         SetEvent(hEvent);
    }   
    else  
    {  
        ResetEvent(hEvent);
    }  
}

void CCopyFoldersDlg::OnTimer(UINT_PTR nIDEvent)  
{  
    CDialog::OnTimer(nIDEvent);  
}

完整代码：
.cpp文件

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// CopyFoldersDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CopyFolders.h"
#include "CopyFoldersDlg.h"
#include "windows.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

static int count = 0; 
#define WM_USER_PROCESS (WM_USER+101)  

void CopyDirectory(CString source, CString target,CWnd * pWndMsg);  
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

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()

/////////////////////////////////////////////////////////////////////////////
// CCopyFoldersDlg dialog

CCopyFoldersDlg::CCopyFoldersDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCopyFoldersDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCopyFoldersDlg)
	m_SrcPath = _T("");
	m_DesPath = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CCopyFoldersDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCopyFoldersDlg)
	DDX_Control(pDX, IDC_PROGRESS, m_Progress);
	DDX_Text(pDX, IDC_EDIT1, m_SrcPath);
	DDX_Text(pDX, IDC_EDIT2, m_DesPath);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCopyFoldersDlg, CDialog)
	//{{AFX_MSG_MAP(CCopyFoldersDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_START, OnStart)
	ON_BN_CLICKED(IDC_STOP, OnStop)
	ON_MESSAGE(WM_USER_PROCESS, Do_process)  
	ON_WM_TIMER()  
 
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCopyFoldersDlg message handlers

BOOL CCopyFoldersDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	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);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCopyFoldersDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CCopyFoldersDlg::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();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCopyFoldersDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}



//复制函数
void CopyDirectory(CString source, CString target, CCopyFoldersDlg * pDlg)    
{
 	 
	CreateDirectory(target,NULL);   
  
    CFileFind finder;    
    CString path;    
    path.Format(_T("%s\\*.*"),source);    
  
    BOOL bWorking = finder.FindFile(path);    
    while (bWorking)  
    {   
        bWorking = finder.FindNextFile();   
           
        if (finder.IsDirectory() && !finder.IsDots())  
        {   
            CopyDirectory(finder.GetFilePath(), target+_T("\\")+finder.GetFileName(), pDlg);  //递归 
        }    
        else  
        {      

			WaitForSingleObject(pDlg->hEvent,INFINITE);

            CopyFile(finder.GetFilePath(), target+_T("\\")+finder.GetFileName(), FALSE);   
            count++;  
            pDlg->PostMessage(WM_USER_PROCESS, count);  
          
  
             Sleep(50);   
        }   
    }    
}

VOID GetInfo(CString csPath, long& FoldersNum, long& FilesNum)  
{     
    SetCurrentDirectory(csPath);  
    CFileFind finder;  
    BOOL bWorking = finder.FindFile(_T("*.*"));  
    while(bWorking)  
    {  
        bWorking = finder.FindNextFile();  
  
        if(finder.IsDots())   
        {  
            continue;  
        }  
        else if(finder.IsDirectory())  
        {  
            ++FoldersNum;  
            GetInfo(finder.GetFilePath(), FoldersNum, FilesNum);  
        }  
        else  
        {  
            ++FilesNum;  
        }  
    }  
      
}  

//复制线程
DWORD WINAPI CCopyFoldersDlg::CopyFolders(LPVOID pParam)
{  
	CCopyFoldersDlg* pDlg = (CCopyFoldersDlg*)pParam;  

	 if (!pDlg) 
	 {
		 return 0;  
	 }
	 ResetEvent(pDlg->hExit);  

	long FoldersNum  = 0;                 
    long FilesNum = 0;                  
    GetInfo(pDlg->m_SrcPath,FoldersNum, FilesNum);  
	pDlg->m_Progress.SetRange(0, FilesNum);  
    pDlg->m_Progress.SetStep(1); 
	CopyDirectory(pDlg->m_SrcPath, pDlg->m_DesPath, pDlg);   

	SetEvent(pDlg->hExit);  
	return 0;
}

LRESULT CCopyFoldersDlg::Do_process(WPARAM wParam, LPARAM lParam)   
{   
   wParam += 1;  
   m_Progress.SetPos(wParam);    
    return 0;  
}         
  



void CCopyFoldersDlg::OnStart() 
{
	UpdateData(true);

	if ((m_SrcPath.IsEmpty() && m_DesPath.IsEmpty()))
	{
		MessageBox("路径不能为空！");
		return;
	}

	else
	{
		//创建线程
		hThread = CreateThread(NULL, 0, CopyFolders, this, 0, NULL);
		hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
		CloseHandle(hThread);
	}
}


void CCopyFoldersDlg::OnStop() 
{
	m_iStatus++;  
         
    if (m_iStatus % 2 == 0)  
    {    
         SetEvent(hEvent);
    }   
    else  
    {  
        ResetEvent(hEvent);
    }  
}

void CCopyFoldersDlg::OnTimer(UINT_PTR nIDEvent)  
{  
    CDialog::OnTimer(nIDEvent);  
}

.h文件：

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// CopyFoldersDlg.h : header file
//

#if !defined(AFX_COPYFOLDERSDLG_H__BADF1BD0_296B_4FED_96F7_BCD2628D4B03__INCLUDED_)
#define AFX_COPYFOLDERSDLG_H__BADF1BD0_296B_4FED_96F7_BCD2628D4B03__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000



/////////////////////////////////////////////////////////////////////////////
// CCopyFoldersDlg dialog

class CCopyFoldersDlg : public CDialog
{
// Construction
public:
	CCopyFoldersDlg(CWnd* pParent = NULL);	// standard constructor
				
	HANDLE hThread;
	HANDLE hEvent;     
	HANDLE hExit;  

	static DWORD WINAPI CopyFolders(LPVOID pParam);
	int m_iStatus;  

// Dialog Data
	//{{AFX_DATA(CCopyFoldersDlg)
	enum { IDD = IDD_COPYFOLDERS_DIALOG };
	CProgressCtrl	m_Progress;
	CString	m_SrcPath;
	CString	m_DesPath;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CCopyFoldersDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;





	// Generated message map functions
	//{{AFX_MSG(CCopyFoldersDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OnStart();
	afx_msg void OnStop();
	afx_msg LRESULT CCopyFoldersDlg::Do_process(WPARAM wParam,LPARAM lParam); 
    afx_msg void OnTimer(UINT_PTR nIDEvent);  
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_COPYFOLDERSDLG_H__BADF1BD0_296B_4FED_96F7_BCD2628D4B03__INCLUDED_)

界面：
界面

另一种方案（大同小异）：
.cpp文件

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// FileCopyNumDlg.cpp : implementation file
//

#include "stdafx.h"
#include "FileCopyNum.h"
#include "FileCopyNumDlg.h"

#define WM_COPYFILE_NOTIFY_NUM WM_USER+1
#define WM_COPYFILE_NOTIFY_SUM WM_USER+8
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

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()

/////////////////////////////////////////////////////////////////////////////
// CFileCopyNumDlg dialog

CFileCopyNumDlg::CFileCopyNumDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CFileCopyNumDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFileCopyNumDlg)
	m_sourcePath = _T("");
	m_desPath = _T("");
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CFileCopyNumDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFileCopyNumDlg)
	DDX_Control(pDX, IDC_PROGRESS1, m_progress);
	DDX_Text(pDX, IDC_EDIT1, m_sourcePath);
	DDX_Text(pDX, IDC_EDIT2, m_desPath);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CFileCopyNumDlg, CDialog)
	//{{AFX_MSG_MAP(CFileCopyNumDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BTN_CHOOSEFILE1, OnBtnChoosefile1)
	ON_BN_CLICKED(IDC_BTN_CHOOSEFILE2, OnBtnChoosefile2)
	ON_BN_CLICKED(IDC_BTN_PAUSE, OnBtnPause)
	ON_BN_CLICKED(IDC_BTN_RESUME, OnBtnResume)
	ON_WM_TIMER()
	ON_BN_CLICKED(IDC_BTN_BEGIN, OnBtnBegin)

	ON_MESSAGE(WM_COPYFILE_NOTIFY_NUM, OnCopyFileNotifyNum)
	ON_MESSAGE(WM_COPYFILE_NOTIFY_SUM, OnCopyFileNotifySum)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFileCopyNumDlg message handlers

BOOL CFileCopyNumDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	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);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	m_num = 0;
	m_sum = 0;
	m_progress.SetRange(0, 100);
	m_progress.SetPos(0);
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CFileCopyNumDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CFileCopyNumDlg::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();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CFileCopyNumDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CFileCopyNumDlg::OnBtnChoosefile1() 
{
    CFileDialog dlg(TRUE);
	if(IDOK==dlg.DoModal())
	{
		strSourceFile=dlg.GetPathName();
	}
	SetDlgItemText(IDC_EDIT1,strSourceFile);	
}

void CFileCopyNumDlg::OnBtnChoosefile2() 
{
    CFileDialog dlg(TRUE);
	if(IDOK==dlg.DoModal())
	{
		strNewFile=dlg.GetPathName();
	}
	SetDlgItemText(IDC_EDIT2,strSourceFile);	
}

void CFileCopyNumDlg::OnBtnBegin() 
{
	UpdateData(TRUE);

	hThread = CreateThread(NULL, 0, ThreadProc_Copy, this, 0, NULL);
	hEvent = CreateEvent(NULL, TRUE, TRUE, NULL);
	
	
}

DWORD WINAPI CFileCopyNumDlg::ThreadProc_Copy(LPVOID lpParam)
{
	double num = 0;
	double sum = 0;

	CString SourcePath = ((CFileCopyNumDlg*)lpParam)->m_sourcePath;
	CString DesPath = ((CFileCopyNumDlg*)lpParam)->m_desPath + L"\\";
  
	CFileFind findcount;
	BOOL bRet = findcount.FindFile(((CFileCopyNumDlg*)lpParam)->m_sourcePath + CString("\\*.*"));
	
	while (bRet)
	{
		bRet = findcount.FindNextFile();
		if (findcount.IsDirectory())
		{
			continue;
		}
		else
		{
			((CFileCopyNumDlg*)lpParam)->PostMessage(WM_COPYFILE_NOTIFY_SUM);
		}
	}
	findcount.Close();

	CFileFind find;
	bRet =  find.FindFile(((CFileCopyNumDlg*)lpParam)->m_sourcePath + CString("\\*.*"));

	while (bRet)
	{
		bRet = find.FindNextFile();
		if (find.IsDirectory())
		{
			continue;
		}
		else
		{
			((CFileCopyNumDlg*)lpParam)->m_sourcePath = find.GetFilePath();
			((CFileCopyNumDlg*)lpParam)->m_desPath = DesPath + find.GetFileName();
			
			WaitForSingleObject(((CFileCopyNumDlg*)lpParam)->hEvent,INFINITE);

			CopyFile(((CFileCopyNumDlg*)lpParam)->m_sourcePath, ((CFileCopyNumDlg*)lpParam)->m_desPath, FALSE);
			((CFileCopyNumDlg*)lpParam)->PostMessage(WM_COPYFILE_NOTIFY_NUM);
			
		}
	}
   
    AfxMessageBox("复制成功!");
	return 0 ;
}


void CFileCopyNumDlg::OnBtnPause() 
{
     ResetEvent(hEvent);	
}

void CFileCopyNumDlg::OnBtnResume() 
{
     SetEvent(hEvent);
}

void CFileCopyNumDlg::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	
	CDialog::OnTimer(nIDEvent);
}


afx_msg LRESULT CFileCopyNumDlg::OnCopyFileNotifyNum(WPARAM wParam, LPARAM lParam)
{
	m_num++;
	m_progress.SetPos(int(m_num / m_sum * 100));
	return 0;
}


afx_msg LRESULT CFileCopyNumDlg::OnCopyFileNotifySum(WPARAM wParam, LPARAM lParam)
{
	m_sum++;
	return 0;
}

.h文件

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// FileCopyNumDlg.h : header file
//

#if !defined(AFX_FILECOPYNUMDLG_H__02EF2204_005C_4A21_A048_ED73C9CD1F34__INCLUDED_)
#define AFX_FILECOPYNUMDLG_H__02EF2204_005C_4A21_A048_ED73C9CD1F34__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CFileCopyNumDlg dialog

class CFileCopyNumDlg : public CDialog
{
// Construction
public:
	CFileCopyNumDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	//{{AFX_DATA(CFileCopyNumDlg)
	enum { IDD = IDD_FILECOPYNUM_DIALOG };
	CProgressCtrl	m_progress;
	CString	m_sourcePath;
	CString	m_desPath;
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CFileCopyNumDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CFileCopyNumDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OnBtnChoosefile1();
	afx_msg void OnBtnChoosefile2();
	afx_msg void OnBtnPause();
	afx_msg void OnBtnResume();
	afx_msg void OnTimer(UINT nIDEvent);
	afx_msg void OnBtnBegin();

	afx_msg LRESULT OnCopyFileNotifyNum(WPARAM wParam, LPARAM lParam);
	afx_msg LRESULT OnCopyFileNotifySum(WPARAM wParam, LPARAM lParam);
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
public:
   // LPCTSTR lpExistingPathName;			//源文件
   //LPCTSTR lpNewPathName;	            //目标文件
    HANDLE hThread;                     //线程句柄
	HANDLE hEvent;                      //复制暂停事件

    CString strSourceFile;
	CString strNewFile;

	double m_num;
	double m_sum;
	static DWORD WINAPI ThreadProc_Copy(LPVOID lpParam);//线程函数
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_FILECOPYNUMDLG_H__02EF2204_005C_4A21_A048_ED73C9CD1F34__INCLUDED_)

这里写图片描述

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本文链接是：https://hubojing.github.io/2017/06/15/MFC-多线程-进度条-复制文件（夹）/

更新于：2017年6月15日

CPP

MFC

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