[SOLVED] QFile doesn't create the file

mahmoud899

Hello, I am writing a simple program. What I want to do is append two QStrings together and send them to the constructor of the QFile variable. Before I do that I check one of the QStrings if it has "/" at the end, if it doesn't I append it to it. Then I append the two strings together and send them to the constructor of the QFile variable. When I run it prints out that if failed to create the file, but when I type the string itself in the constructor of the QFile variable "QFile myFile("/home/mahmoud/Desktop/mahmoud.txt");" it creates the file. I want to take QStrings from the user and send them to the constructor, not type the the String itself in the constructor. How can I solve that problem.

@
#include <QApplication>
#include <QString>
#include <QTextStream>
#include <QFile>

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

QTextStream output(stdout);

QString location = "/home/mahmoud/Destkop";
QString name = "mahmoud.txt";
QString appendAll;
QString fileName;

if( !location.endsWith("/") )
{
    location.append("/");
}

appendAll = location.append(name);

output << appendAll << endl;

QFile myFile&#40;appendAll&#41;;

if(myFile.open(QIODevice::WriteOnly | QIODevice::Text &#41;)
{
    output << "File Has Been Created" << endl;
}
else
{
    output << "Failed to Create File" << endl;
}

QTextStream writeToFile&#40;&myFile&#41;;

writeToFile << "Hello World" << endl;

myFile.close(&#41;;

return a.exec(&#41;;

}
@

sierdzio

You don't have any code that actually reads user input. If you want your app to be console-base, then simply use app arguments to get input from the user ("QCoreApplication::arguments()":http://qt-project.org/doc/qt-5.0/qtcore/qcoreapplication.html#arguments).

Or make a GUI with some QLineEdits used to read user input.

If you mean that you want to grab user input during runtime, you need to resort to standard C++ cin statement, I guess. IMO taking the arguments from arguments list is better.

mahmoud899

Hello, what I've meant by taking the QStrings from the user is that I want to do that later on in another project, for now I am just having QStrings and appending them and sending them to the constructor of the QFile variable. My problem is when I append two QStrings and send them to the QFile variable constructor it doesn't work

@
QString location = "/home/mahmoud/Destkop";
QString name = "mahmoud.txt";
QString appendAll;
QString fileName;

if( !location.endsWith("/") )
{
    location.append("/");
}

appendAll = location.append(name);

output << appendAll << endl;

QFile myFile&#40;appendAll&#41;;

@

but when I type the String myself in the QFile variable constructor it works

@
QString location = "/home/mahmoud/Destkop";
QString name = "mahmoud.txt";
QString appendAll;
QString fileName;

if( !location.endsWith("/") )
{
    location.append("/");
}

appendAll = location.append(name);

output << appendAll << endl;

QFile myFile&#40;"/home/mahmoud/Desktop/mahmoud.txt"&#41;;

@

This one works fine and it creates the file I want.

sierdzio

Strange. What happens when you pass 'location' to Your QFile constructor? I'm writing from a cell phone and can't check myself. Line 11 looks a bit suspicious to me.

mahmoud899

Hi, I have found the problem, Line 13 in the code I have posted, a typing error, I wrote Destkop instead of Desktop.

sierdzio

Haha, well spotted! Happy coding!