finding a string in text file

[sammey_geek]

hi,

i am newbie.... i am working on qfile....i am having a file and some text data in it....i have to read the file till the end...and compare a string in that file..for example.. i have this data in file " this file contains properties and details of the project"..... in this i have to compare string properties....can anyone tell me..how to compare string...thanks in advance...

[wysota]

Is this a school project?

[8Observer8]

I hope, it is useful for beginning:

#include <QCoreApplication>
#include <QFile>
#include <QTextStream>
#include <QDebug>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    QString filePath = "C:/text.txt";
 
    QFile file(filePath);
 
    if (file.open(QFile::ReadOnly | QFile::Text)) {
        QTextStream in(&file);
        QString text = in.readAll();
        qDebug() << text;
        file.close();
    }
    else {
        qDebug() << "Failed to open file for reading";
    }
 
    return a.exec();
}

#include <QCoreApplication>
#include <QFile>
#include <QTextStream>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QString filePath = "C:/text.txt";

    QFile file(filePath);

    if (file.open(QFile::ReadOnly | QFile::Text)) {
        QTextStream in(&file);
        QString text = in.readAll();
        qDebug() << text;
        file.close();
    }
    else {
        qDebug() << "Failed to open file for reading";
    }
    
    return a.exec();
}

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[sammey_geek]

hi

how can i find a particular string in a .txt file?? is there any qt function to search the .txt file and find the string??






thanks
sammey

[wysota]

http://en.wikipedia.org/wiki/String_searching_algorithm

If you can afford reading the whole file to memory before searching, you can load the file into a string and then use QString::indexOf() or similar.