《深入浅出MFC》笔记（三）-白红宇

1,Win32 Console程序示例:

#include <windows.h>

#include <stdio.h>

#include <string.h>

#include <conio.h>

const int FILEMAX = 300; // allow max. 300 files in each directory

typedef struct _DESTFILE

{//目标文件

WIN32_FIND_DATA fd;

BOOL bMatch;

} DESTFILE;

typedef struct _SRCFILE

{//源文件

WIN32_FIND_DATA fd;

BOOL bIsNew;

} SRCFILE;

int main(int argc, char *argv[])

{

int i, j, iSrcFiles, iDestFiles;

HANDLE hFile;

WIN32_FIND_DATA fd;

BOOL bRet = TRUE;

char src[MAX_PATH+1], dest[MAX_PATH+1], destpath[MAX_PATH+1];

SRCFILE srcFiles[FILEMAX];

DESTFILE destFiles[FILEMAX];

BOOL bFound = FALSE;

DWORD dwcNameSize = MAX_PATH+1;

char szBuffer[MAX_PATH+1];

if (argc < 2)

{

return -1;

}

for (i=0; i< argc; i++)

printf("argv[%d]: %s \n", i, argv[i]);

strcpy(src, argv[1]);

if (argc == 2)

{//未指定目标文件夹

GetCurrentDirectory(dwcNameSize,(LPSTR) &szBuffer);

strcpy(dest, szBuffer);

dest[0] = 'I';//默认目标盘

strcpy(destpath, dest); // destpath should be something like "k:\u002\doc\".

strcat(destpath, "\\"); // just prepare for use latter (when updating and deleting).

strcat(dest, "\\*.*"); // dest should be something like "k:\u002\doc\*.*"

}

else

{//指定目标文件夹

strcpy(destpath, argv[2]); // destpath should be something like "k:"

// just prepare for usage latter (when updating and deleting).

strcpy(dest, argv[2]);

strcat(dest, "*.*"); // then dest should be something like "k:*.*"

}

strcat(src, "*.*"); // src should be something like g:*.*

// prepare srcFiles[]

bRet = TRUE;

iSrcFiles = 0;

// printf("Directory listing of %s\n", src);

hFile = FindFirstFile(src, &fd);

while (hFile != INVALID_HANDLE_VALUE && bRet)

{

if (fd.dwFileAttributes == FILE_ATTRIBUTE_ARCHIVE) {

srcFiles[iSrcFiles].fd = fd;

srcFiles[iSrcFiles].bIsNew = FALSE;

// printf("%s\n", srcFiles[iSrcFiles].fd.cFileName);

iSrcFiles++;

}

bRet = FindNextFile(hFile, &fd);

}

// prepare destFiles[]

bRet = TRUE;

iDestFiles = 0;

// printf("Directory listing of %s\n", dest);

hFile = FindFirstFile(dest, &fd);

while (hFile != INVALID_HANDLE_VALUE && bRet)

{

if (fd.dwFileAttributes == FILE_ATTRIBUTE_ARCHIVE) {

destFiles[iDestFiles].fd = fd;

destFiles[iDestFiles].bMatch = FALSE;

// printf("%s\n", destFiles[iDestFiles].fd.cFileName);

iDestFiles++;

}

bRet = FindNextFile(hFile, &fd);

}

// check for new files and redudant files

for (i=0; i<iSrcFiles; i++) {

bFound = FALSE;

for (j=0; j<iDestFiles; j++) {

if (!(destFiles[j].bMatch)) {

if (strcmpi(destFiles[j].fd.cFileName, srcFiles[i].fd.cFileName) == 0)

{//找到匹配

// find same files in dest directory

destFiles[j].bMatch = TRUE;

bFound = TRUE;

if (CompareFileTime(&destFiles[j].fd.ftLastWriteTime,

&srcFiles[i].fd.ftLastWriteTime) < 0)

{//比较文件更新时间

// src file is new than dest file

srcFiles[i].bIsNew = TRUE;

}

break; // break j loop, because found!

}

if (bFound == FALSE) // not found, so is new.

srcFiles[i].bIsNew = TRUE;

}

// updating new files

for (i=0, j=0; i<iSrcFiles; i++) { // j for new files counter

if (srcFiles[i].bIsNew) {

printf("%s\n", srcFiles[i].fd.cFileName);

j++;

}

if (j==0)

{

printf("no file new \n");

}

else

{

printf("There are %d files need to be updated \n", j);

printf("if you do not want to update these files, press Ctrl-Break \n");

printf("otherwise anykey\n");

getch();

}

for (i=0; i<iSrcFiles; i++)

{

if (srcFiles[i].bIsNew)

{

strcpy(dest, destpath);

strcat(dest, srcFiles[i].fd.cFileName);

CopyFile(srcFiles[i].fd.cFileName, dest, FALSE); // FALSE means overwrite

}

// deleting redudant files

for (j=0, i=0; j<iDestFiles; j++)

{ // i for redudant files counter

if (!destFiles[j].bMatch)

{

printf("%s\n", destFiles[j].fd.cFileName);

i++;

}

if (i==0)

{

printf("no redudant file \n");

}

else

{

printf("There are %d files need to be deleted \n", i);

printf("if you do not want to delete those files, press Ctrl-Break \n");

printf("otherwise anykey\n");

getch();

}

for (j=0; j<iDestFiles; j++)

{

if (!destFiles[j].bMatch)

{

strcpy(dest, destpath);

strcat(dest, destFiles[j].fd.cFileName);

DeleteFile(dest);

}

return 0;

}

2，String型转换为LPWSTR

在TextOut中想直接输出一个string型不行，它参数非得是一个LPWSTR，解决的办法是用MultiByteToWideChar，MultiByteToWideChar 函数可以把普通字符串转换为一个宽字符字符串（Unicode）

LONG OnPaint(HWND hWnd,UINT nMessage,WPARAM wParam,LPARAM lParam)

{

PAINTSTRUCT ps;

HDC hdc;

hdc = BeginPaint(hWnd, &ps);

WCHAR wszMsgInfo[256];

string strInfo = "aa";

MultiByteToWideChar(CP_ACP,0,strInfo.c_str(),strInfo.length(),wszMsgInfo,sizeof(wszMsgInfo)/sizeof(wszMsgInfo[0]));

::TextOut(hdc,10,10,wszMsgInfo,strInfo.length());

EndPaint(hWnd, &ps);

return 0;

}

3，对上一节的代码进行修改，加入一个新的功能，使得能从菜单呼出系统中的记事本

首先修改命令映射表

MSGMAP_ENTRY _commandEntries[] =

{

IDM_ABOUT,OnAbout,

IDM_EXIT,OnExit,

IDM_NOTEBOOK,OnNoteBook

};

再添加一个处理函数，在函数中创建一个记事本进程：

LONG OnNoteBook(HWND hWnd,UINT nMessage,WPARAM wParam,LPARAM lParam)

{

PROCESS_INFORMATION pInfo;

STARTUPINFO si;

ZeroMemory( &si, sizeof(si) );

si.cb = sizeof(si);

ZeroMemory( &pInfo, sizeof(pInfo) );

BOOL bCreated = FALSE;

bCreated = ::CreateProcess(_T("C:\\WINDOWS\\system32\\notepad.exe"),NULL,NULL,NULL,false,0,NULL,NULL,&si,&pInfo);

if(bCreated)

{//割断父子进程间的联系

CloseHandle(pInfo.hProcess);

CloseHandle(pInfo.hThread);

} return 0;

}

4，新开一个线程获取系统时间

case IDM_GETSYSTIME:

{

DWORD dwThrId;

hSysTime = CreateThread(NULL,0, (LPTHREAD_START_ROUTINE)ReadCurTime,NULL,0,&dwThrId);

if(hSysTime!=NULL)

{

WaitForSingleObject(hSysTime,INFINITE);

CloseHandle(hSysTime);

}

break;

void ReadCurTime(void)

{//当前系统时间

SYSTEMTIME st;

GetSystemTime(&st);

char buffer[256];

sprintf(buffer,"%d:%d:%d",st.wYear,st.wMonth,st.wDay);

}

本文转自Phinecos(洞庭散人)博客园博客，原文链接：http://www.cnblogs.com/phinecos/archive/2008/01/18/1044929.html，如需转载请自行联系原作者