C++文件操作——MFC打开文件与保存文件

1.MFC打开文件并按行读取文件内容

void CFileDlg::OnBnClickedButtonFileRead()
{
	vector v_str;
	CFileDialog fileDlg(TRUE);
	fileDlg.m_ofn.lpstrTitle = L"Open File";
	fileDlg.m_ofn.lpstrFilter = L"Text Files(*txt)\0*.txt\0All Files(*.*)\0*.*\0\0";
	if (IDOK == fileDlg.DoModal())
	{
		vector v_cstr;
		CStdioFile file;
		if (file.Open(fileDlg.GetPathName(), CFile::typeText | CFile::modeRead))
		{
			CString str;
			// 处理UNICODE下【中文乱码】异常
			char * pOldLocale = _strdup(setlocale(LC_CTYPE, NULL));
			setlocale(LC_CTYPE, "chs");

			while (file.ReadString(str))
			{
				v_cstr.push_back(str);
				str.Empty();
			}
			// 处理完毕后,释放资源
			setlocale(LC_CTYPE, pOldLocale);
			free(pOldLocale);
		}
		file.Close();
		m_CtrlEditReadFile.SetWindowText(fileDlg.GetPathName());
	}
}

2.MFC保存文件内容，则将上述

void CFileDlg::OnBnClickedButtonFileWrite()
{
	CFileDialog FileDlg(FALSE, L"txt", _T("Test"));   
	FileDlg.m_ofn.lpstrTitle = L"Save File";  
	FileDlg.m_ofn.lpstrFilter = L"Text Files(*txt)\0*.txt\0All Files(*.*)\0*.*\0\0";
	if (IDOK == FileDlg.DoModal())  
	{  
		CFile File(FileDlg.GetPathName(),CFile::modeCreate|CFile::modeReadWrite);  
		char szBufData[100] = {"hello word!"};  
		//写入文件内容,不包含/0  
		File.Write(szBufData, strlen(szBufData));  
		//立即写入，不缓冲  
		File.Flush();  
		//文件操作结束关闭  
		File.Close();  
	}  
}