只用一个load键打开文件

最新推荐文章于 2019-12-24 14:02:26 发布

Phenixyf

最新推荐文章于 2019-12-24 14:02:26 发布

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分类专栏： VC++ CFile

本文链接：https://blog.youkuaiyun.com/phenixyf/article/details/41750713

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本文介绍了一个基于MFC的应用程序中如何使用对话框来选择并加载文件内容至内存的过程。具体步骤包括：设置文件对话框样式、过滤器及默认文件名；通过对话框获取用户选定文件的路径；打开文件并读取其内容到缓冲区；最后解析文件内容并填充到UI编辑框中。

处理过程分：

设置打开文件对话框；

获取要打开文件的路径；

根据打开路径打开文件；

将文件内容取出后保存到CString；

处理取出的文件。

void COperationDlg::OnBnClickedBtnOpeLoad()
{
	// TODO: Add your control notification handler code here
	
	CString sFilePath;
	// 打开文件对话框样式设置
	CFileDialog FileOpenDialog(TRUE);
	FileOpenDialog.m_ofn.Flags = OFN_ENABLEHOOK|OFN_EXPLORER;
	CString strFilter;
	strFilter = _T("TXT");
	strFilter += (TCHAR)'\0'; 
	strFilter += _T("*.txt");
	strFilter += (TCHAR)'\0';  
	CString allFilter;
	VERIFY(allFilter.LoadString(AFX_IDS_ALLFILTER));
	strFilter += allFilter;
	strFilter += (TCHAR)'\0';  
	strFilter += _T("*.*");
	strFilter += (TCHAR)'\0';   

	FileOpenDialog.m_ofn.lpstrFilter = strFilter;
	FileOpenDialog.m_ofn.lpstrTitle = "Download Filename...";

	// Set up the default to match a file that is open.....
	CString sFileName;
	sFileName.Empty();
	if ((((CMDIFrameWnd *) AfxGetMainWnd())->MDIGetActive()) != NULL)
		sFileName = (((CMDIFrameWnd *) AfxGetMainWnd())->MDIGetActive())->GetActiveDocument()->GetTitle();
	if (!sFileName.IsEmpty())
	{
		if (sFileName.Find('.') != -1)
			sFileName = sFileName.Left(sFileName.Find('.'));
		sFileName += _T(".hex");
		strcpy(FileOpenDialog.m_ofn.lpstrFile,LPCTSTR(sFileName));
	}

	// 选择要打开的文件后
	BOOL bResult = FileOpenDialog.DoModal() == IDOK ? TRUE : FALSE;
	if (bResult)
		sFilePath = FileOpenDialog.GetPathName();		// 获取要打开文件的路径
	else
		AfxMessageBox("Can't find the file");

	// 打开文件取出里面的数据存入字符串buffer
	// 获取文件大小
	HANDLE fileHand;
	DWORD fileSize;
	fileHand = CreateFile(sFilePath,0,0,0,OPEN_EXISTING,0,0);
	fileSize = GetFileSize(fileHand,0);

	// 读取文件
	char * bufFile = new char [fileSize];	// 文件读取buffer
	CFile file;
	file.Open(sFilePath,CFile::modeRead);	
	file.Read(bufFile,fileSize);

	// 将文件内容存入字符串
	CString sFile;
	sFile = bufFile;
	
	// 对从文件获得的字符串数据进行处理
	CString sFind = "\r\n";
	int StartPos = 0;		// 每次查找回车键起始位置
	int EndPos = 0;			// 每次找到回车键的位置
	int cNum = 0;			// 每行字符个数
	int enterkeyNum = 0;	// 文件中回车键的个数
	// 获取回车键总个数
	while((EndPos=sFile.Find(sFind,StartPos)) != -1)
	{
		StartPos = EndPos+2;
		enterkeyNum ++;
	}
	CString* sEdit = new CString [enterkeyNum];		// parameter各编辑框字符串buffer
	StartPos = 0;
	EndPos = 0;
	if (enterkeyNum < 15)		// 参数小于15个
	{
		AfxMessageBox("The number of parameter is insufficient");
	}
	else
	{
		if (enterkeyNum == 15)		// 最后一个参数后没有带回车键
		{
			for (int j=0; j<16; j++)
			{
				EndPos = sFile.Find(sFind,StartPos);
				cNum = EndPos - StartPos;
				unsigned char * cEdit = new unsigned char[cNum];
				for (int i=0; i<cNum; i++)
				{
					cEdit[i] = sFile[(StartPos+i)];
				}
				sEdit[j] = cEdit;
				StartPos = EndPos+2;
				delete[] cEdit;
			}
		}
		else						// 最会一个参数后带回车键（可带多个）
		{
			for (int j=0; j<enterkeyNum; j++)
			{
				EndPos = sFile.Find(sFind,StartPos);
				cNum = EndPos - StartPos;
				unsigned char * cEdit = new unsigned char[cNum];
				for (int i=0; i<cNum; i++)
				{
					cEdit[i] = sFile[(StartPos+i)];
				}
				sEdit[j] = cEdit;
				StartPos = EndPos+2;
				delete[] cEdit;
			}
		}
	}

	// 处理好后的字符串分别赋值给给个编辑框
	sPITem_write = sEdit[0];
	sInidenTem_write = sEdit[1];
	sInidenTim_write = sEdit[2];
	sDenTem_write = sEdit[3];
	sDenTim_write = sEdit[4];
	sAnnTem_write = sEdit[5];
	sAnnTim_write = sEdit[6];
	sCycle = sEdit[7];
	sExtTem_write = sEdit[8];
	sExtTim_write = sEdit[9];
	sHoldTem_write = sEdit[10];
	sHoldTim_write = sEdit[11];
	sKP = sEdit[12];
	sKI = sEdit[13];
	sKD = sEdit[14];
	sKL = sEdit[15];

	SetDlgItemTextA(IDC_EDIT_OPE_PITEM,sPITem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_DENTEM,sInidenTem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_DENTIME,sInidenTim_write);
	SetDlgItemTextA(IDC_EDIT_OPE_DENINGTEM,sDenTem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_DENINGTIME,sDenTim_write);
	SetDlgItemTextA(IDC_EDIT_OPE_ANNTEM,sAnnTem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_ANNTIME,sAnnTim_write);
	SetDlgItemTextA(IDC_EDIT_OPE_ANNCYCLE,sCycle);
	SetDlgItemTextA(IDC_EDIT_OPE_EXTTEM,sExtTem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_EXTTIME,sExtTim_write);
	SetDlgItemTextA(IDC_EDIT_OPE_HOLDTEM,sHoldTem_write);
	SetDlgItemTextA(IDC_EDIT_OPE_HOLDTIME,sHoldTim_write);
	SetDlgItemTextA(IDC_EDIT_OPE_KP,sKP);
	SetDlgItemTextA(IDC_EDIT_OPE_KI,sKI);
	SetDlgItemTextA(IDC_EDIT_OPE_KD,sKD);
	SetDlgItemTextA(IDC_EDIT_OPE_KL,sKL);
	
}