[Solved] How to make Ui read from a file and display it



  • Hi All,

    I am trying to fetch some data from a file and display it on a label or a say line edit

    Now if I try it in the following way that is create a label from code and then apply the logic it runs fine but if I try same logic on a ui made from a designer then it gives error.

    Code snippet which is working fine is:

    @

    #include <QFile>
    #include <QApplication>
    #include <QLabel>
    #include <QString>
    #include <QTextStream>
    int main(int argc, char *argv[])
    {
    QApplication app(argc, argv);
    QFile file("/home/pragati/in.txt");
    file.open(QIODevice::ReadOnly | QIODevice::Text);

    QTextStream in(&file);
    QString line = in.readLine();

    QLabel label(line);
    label.show();

    return app.exec();
    }
    @

    But the same thing i do in the following way :
    @

    #include "widget.h"
    #include "ui_widget.h"
    #include <QFile>
    #include <QApplication>
    #include <QLabel>
    #include <QString>
    #include <QTextStream>

    Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
    {
    ui->setupUi(this);
    QFile file("/home/pragati/in.txt");
    file.open(QIODevice::ReadOnly | QIODevice::Text);
    QTextStream in(&file);
    QString line = in.readLine();
    ui->label(line);

    }

    Widget::~Widget()
    {
    delete ui;
    }
    @

    It gives the error : /home/pragati/FIleRead/widget.cpp:18: error: '((Widget*)this)->Widget::ui->Ui::Widget::<anonymous>.Ui_Widget::label' cannot be used as a function

    I know there must be some other way. Please anyone can help me in this.....

    Thanks a ton in advance



  • Should I use a signal and slot to make use that function?



  • You can set the text like

    @ui->label->setText(line);@



  • Whoww......How could I miss something like that....I am so grateful to you for pointing out the silliest thing I forgot.....Thanks a lot Sam!!!



  • You are welcome .



  • :)



  • Kindly Edit the title and add [Solved] to it.

    Happy Coding :)


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