在QT中读取Qfile

read Qfile in qt

本文关键字:Qfile 读取 QT      更新时间:2023-10-16

我是C 和QT的初学者。

我必须读取用户配置文件并在添加新用户时更改它。

[db-Host]
type=1
host=10.25.36.15
charsize=0
foreground=0
background=0
Cursor=0
AnswerBack=None
CursorKeypad=0
termtype=vt220
capslock=0
CharacterSet=0
Num Lock=0
maxrows=0
maxcols=0
Cser_connec=0
functionkey_set=0
mouseCursor=1
autoStart=1
euro=0

我尝试了简单的CPP文件以如下读取。

#include "mainwindow.h"
#include <QApplication>
#include<QFile>
#include<QString>
#include <QTextStream>
QTextStream cout(stdout);
QTextStream cerr(stderr);

int main(int argc, char *argv[])
{
    QString str, newstr;
    QTextStream strbuf(&str);
    QString useName = "[db-Host]";
    QString pi = "ServerName=55333";
    cout << "An in-memory stream" << endl;
    strbuf << "userName: " << lucky << endl
    << "pi: " << pi << endl;

    QFile data("/home/sidheshwar/Desktop/temp.txt");

    cout << "Read data from the file - watch for errors." << endl;
    if(data.open( QIODevice ::ReadOnly)) {
    QTextStream in(&data);
    QString lucky2;
    in >> newstr >> lucky2>>endl;
    if (lucky != lucky2)
    cerr << "ERROR! wrong " << newstr << lucky2 << endl;
    else
    cout << newstr << " OK" << endl;
    QString pi2;
    in >> newstr >> pi2;
    if (pi2 != pi)
    cerr << "ERROR! Wrong " << newstr << pi2 << endl;
    else
    cout << newstr << " OK" << endl;
    data.close();
    }
    return 0;
    }

任何建议如何获得文件中存在的特定用户(在["用户")中,以便我可以重写其字段,否则创建另一个字符串。

i已连接的图像说明在此处输出屏幕截图

我认为您可以直接使用QSettings类直接读取" INI文件",无需自己解析内容。

QSettings settings("/home/sidheshwar/Desktop/temp.txt", QSettings::IniFormat);
// read the [db-Host] host value
QString host = settings.value("db-Host/host").toString();