孙鑫 lesson12 File

写入、读取文件

写入、读取注册表

代码：

    在应用程序开始写入注册表的键值与获取注册表中值

       SetRegistryKey("AXXX");


/*::WriteProfileStringA("my application test","admin","XXX");
CString str;
::GetProfileStringA("my application test","admin","lisi",
str.GetBuffer(100),100);
AfxMessageBox(str);*/


/*WriteProfileString("my application test","admin","XXX");
CString str;
str=GetProfileString("my application test","admin");
AfxMessageBox(str);*/

写入文件

void CFileView::OnFilewrite()
{
// TODO: 在此添加命令处理程序代码
/*FILE *pFile=_wfopen(_T("1.txt"),_T("w"));
fwrite("bbbbb",1,strlen("bbbbb"),pFile);
fseek(pFile,0,SEEK_SET);
fwrite("XXX:",1,strlen("XXX:"),pFile);
//fclose(pFile);
//fflush(pFile);
fclose(pFile);*/


/*FILE *pFile=_wfopen(_T("2.txt"),_T("wb"));
wchar_t ch[3];
ch[0]='a';
ch[1]='10';
ch[2]='b';
fwrite(ch,1,3,pFile);
fclose(pFile);*/


/*
FILE *pFile=_wfopen(_T("3.txt"),_T("w"));
int i=98341;
wchar_t ch[10];
/*ch[0]=9+48;
ch[1]=8+48;
ch[2]=3+48;
ch[3]=4+48;
ch[4]=1+48;*/
//_itow(i,ch,10);
//fwrite(&i,4,1,pFile);
//fwrite(ch,1,10,pFile);
//fclose(pFile);


/*ofstream ofs(_T("4.txt"));
ofs.write("XXX",strlen("XXX"));
ofs.close();*/
/*HANDLE hFile;
hFile=CreateFile(_T("5.txt"),GENERIC_WRITE,0,NULL,CREATE_NEW,FILE_ATTRIBUTE_NORMAL,NULL);
DWORD dwWrites;
WriteFile(hFile,"aaaaaa",strlen("aaaaaa"),&dwWrites,NULL);
CloseHandle(hFile);*/


/*CFile file(_T("6.txt"),CFile::modeCreate |CFile::modeWrite);
file.Write("the sixth txt",strlen("the sixth txt"));
file.Close();*/


CFileDialog fileDlg(FALSE);
fileDlg.m_ofn.lpstrTitle=_T("我的文件保存对话框");
fileDlg.m_ofn.lpstrFilter=_T("Text Files(*.txt)\0*.txt\0All Files(*.*)\0*.*\0\0");
fileDlg.m_ofn.lpstrDefExt=_T("txt");
fileDlg.DoModal();
}



读取文件
void CFileView::OnFileread()
{
// TODO: 在此添加命令处理程序代码
//FILE *pFile=_wfopen(_T("1.txt"),_T("r"));
//wchar_t ch[100];
//memset(ch,0,100);
//fread(ch,1,100,pFile);
//MessageBox(ch);
/*wchar_t *pBuf;
fseek(pFile,0,SEEK_END);
int len=ftell(pFile);
pBuf= new wchar_t[len+1];
rewind(pFile);
fread(pBuf,1,len,pFile);
pBuf[len]=0;
MessageBox(pBuf);
fclose(pFile);*/


/*FILE *pFile=_wfopen(_T("2.txt"),_T("r"));
wchar_t ch[100];
fread(ch,1,3,pFile);
ch[3]=0;
MessageBox(ch);
fclose(pFile);*/


/*ifstream ifs("4.txt");
char ch[100];
memset(ch,0,100);
ifs.read(ch,100);
ifs.close();
MessageBox((LPTSTR)ch);*/


/*HANDLE hFile;
hFile=CreateFile(_T("5.txt"),GENERIC_READ,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
char ch[100];
DWORD dwReads;
ReadFile(hFile,ch,100,&dwReads,NULL);
ch[dwReads]=0;
CloseHandle(hFile);
MessageBox((LPCTSTR)ch);*/


/*CFile file(_T("6.txt"),CFile::modeRead);
wchar_t *pBuf;
DWORD dwFileLen;
dwFileLen=file.GetLength();
pBuf=new wchar_t[dwFileLen+1];
pBuf[dwFileLen]=0;
file.Read(pBuf,dwFileLen);
file.Close();
MessageBox(pBuf);*/


CFileDialog fileDlg(TRUE);
fileDlg.m_ofn.lpstrTitle=_T("我的文件打开对话框");
fileDlg.m_ofn.lpstrFilter=_T("Text Files(*.txt)\0*.txt\0All Files(*.*)\0*.*\0\0");

//fileDlg.m_ofn.lpstrDefExt=_T("txt");
if(IDOK==fileDlg.DoModal())
{
CFile file(fileDlg.GetFileName(),CFile::modeRead);

wchar_t *pBuf;
   DWORD dwFileLen;
   dwFileLen=file.GetLength();
   pBuf=new wchar_t[dwFileLen+1];
   pBuf[dwFileLen]=0;
   file.Read(pBuf,dwFileLen);
   file.Close();
   MessageBox((LPCTSTR)pBuf);


/*CFile file(fileDlg.GetFileName(),CFile::modeRead);
char *pBuf;
DWORD dwFileLen;
dwFileLen=file.GetLength();
pBuf=new char[dwFileLen+1];
pBuf[dwFileLen]=0;
file.Read(pBuf,dwFileLen);
file.Close();
MessageBox((LPCTSTR)pBuf);*/
}
}



往注册表写入键值
void CFileView::OnRegWrite()
{
// TODO: 在此添加命令处理程序代码
HKEY hkey;
DWORD dwAge=30;
RegCreateKey(HKEY_CURRENT_USER,"Software\\AXXX\\admin2",&hkey);
RegSetValue(hkey,NULL,REG_SZ,"XXX2",strlen("XXX2"));
RegSetValueEx(hkey,"age",0,REG_DWORD,(const BYTE*)dwAge,4);
RegCloseKey(hkey);
}



从注册表读取键值
void CFileView::OnRegRead()
{
// TODO: 在此添加命令处理程序代码
/*LONG lValue;
RegQueryValue(HKEY_CURRENT_USER,"Software\\AXXX\\admin2",NULL,&lValue);
char *pBuf=new char[lValue];
RegQueryValue(HKEY_CURRENT_USER,"Software\\AXXX\\admin2",pBuf,&lValue);
MessageBox(pBuf);*/


HKEY hkey;
RegOpenKey(HKEY_CURRENT_USER,"Software\\AXXX\\admin2",&hkey);
DWORD dwType;
DWORD dwValue;
DWORD dwAge;
RegQueryValueEx(hkey,"age",0,&dwType,(LPBYTE)&dwAge,&dwValue);
CString str;
str.Format("age=%d",dwAge);
MessageBox(str);
}