[c++] cstdiofile读写文本文件.txt

看看吧,很好的东西,

可用CStdioFile，如：(其中WriteString为写入一行，ReadString为读取一行文本)

CStdioFile dataStore;

if (file)
{
    CString  somecode;                            //也可采用LPTSTR类型，将不会删除文本中的\n回车符

    BOOL bIsOk = dataStore.Open(strPath+"\\"+Filename,
        CFile::modeCreate 
        | CFile::modeWrite 
        | CFile::shareDenyWrite 
        | CFile::typeText);
    
    if (!bIsOk)
        return FALSE;
    
    // 读写网页文件，直到为空
    while (file->ReadString(somecode) != NULL) //如果采用LPTSTR类型，读取最大个数nMax置0，使它遇空字符时结束
    {
        dataStore.WriteString(somecode);
        dataStore.WriteString("\n");           //如果somecode采用LPTSTR类型,可不用此句
    }
}

徐景周

// -------------------------------------------------
// ReadString读文件, WriteString写文件, CFile::modeNoTruncate追加一行的打开方式

		CStdioFile dataStore;
		CString somecode;

		BOOL bIsOk = dataStore.Open( rxFile,
			CFile::modeRead
			| CFile::shareDenyWrite
			| CFile::typeText);
		if (!bIsOk)
			return;

		BOOL bIsExist = FALSE;
		// 逐行读文本文件
		while (dataStore.ReadString(somecode) != NULL)
		{
			//AfxMessageBox(somecode);
			if (somecode.CompareNoCase(g_ARXPrfMgrName) == 0)
			{
				bIsExist = TRUE;
				break;
			}
		}
		dataStore.Close(); // 关闭文件

		if (bIsExist != TRUE)
		{
			bIsOk = dataStore.Open( rxFile,CFile::modeCreate|CFile::modeNoTruncate	// Append 一行的方法
                |CFile::modeReadWrite  
                | CFile::shareDenyWrite
                | CFile::typeText);
			if (!bIsOk)
				return;
			dataStore.SeekToEnd();
			dataStore.WriteString("\n");
			dataStore.WriteString(g_ARXPrfMgrName);
			dataStore.WriteString("\n");
			dataStore.Close(); // 关闭文件
		}