QTextStream - No data in File

[Settz]

Hi All

I am having problems with writing data to a text file using QTextStream.

The file is created but has nothing in it.

I am missing something so obvious.

Thanks in advance.

Code snippets below.

int cTask::processNewTransactions(QString accName, QString tmpFileName, QString transFileName, vector<cCategory> &catList)
{
    int retVal = OK;
    QFile tFile(transFileName);
    QFile oFile(tmpFileName);
    QString line;
    string  token;
    int tokenId = 0;
    bool bHeaderRow = true;
    cTransaction objTrans;
    std::string::size_type sz = 0;     // alias of size_t

    if(!tFile.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        cout << "ERROR: Unable to open Transactions File\n";

        emit finished();
    }

    if(!oFile.open(QIODevice::WriteOnly | QIODevice::Text))
    {
        cout << "ERROR: Unable to open Work File\n";

        emit finished();
    }

    QTextStream outFile(&oFile);
    
    // Write header to output file
    outFile << QString("Account,")
            << QString("Date,")
            << QString("ID,")
            << QString("Spare,")
            << QString("Type,")
            << QString("Text,")
            << QString("Amount,")
            << QString("Balance,")
            << QString("Group,")
            << QString("Sub Group,")
            << QString("Classification")
            << endl;
            

    transModel->clearData();

    while (!tFile.atEnd())
    {
        line = tFile.readLine();

        if(!bHeaderRow || bNoHeaderRow)
        {
            std::istringstream iss(line.toStdString());

            tokenId = 0;

            objTrans.txAccName = accName;

 ——— Snip

Code to built objTrans

 ——— Snip

 
            updateCategory(objTrans, catList);
            //cout << objTrans; // << endl;
            outFile << objTrans << endl;
            transModel->addRow(objTrans);

        }
        bHeaderRow = false;
    }

    outFile.flush();
    oFile.close();
    tFile.close();

    return retVal;
}

[JonB]

@Settz said in QTextStream - No data in File:

The file is created but has nothing in it.

At a glance code looks OK (you obviously got it from some very old post here?). You won't see anything in it necessarily till after outFile.flush(); oFile.close();, are you looking in the file before then?

[jsulm]

@Settz You should also add QIODevice::Append to open() call if you do not want to lose old file content each time you call processNewTransactions().

[Settz]

Thx @JonB

I am checking the file after the application has run. It's driving me nuts lol

In other areas of the app I am opening and writing data to various files .

Thx @jsulm

This is a temporary workfile and a new one is created each time the app runs - no need to append.

[Christian Ehrlicher]

So simply open the file, write something into it and see if there is content in it without all the other loops directly at the start of your function.

[Settz]

@Christian-Ehrlicher Thankyou - good idea - did that but nothing

[Christian Ehrlicher]

Then I would guess you overwrite it somewhere else.

[Settz]

Thankyou all for your help - it is working now.

@Christian-Ehrlicher You put me on the right track.

In another part of the application I had a bug that would reopen the file for writing !