Concatenate string to QString

david_aa

Hi all,

I need to concatenate the start date, start time with the end date, end time.

For example: 2011/05/18 10:53:55.371;2012/09/22 10:57:32.168

Can you help me?

JKSH

Hi,

Search "concat" in the "QString documentation":http://qt-project.org/doc/qt-5/qstring.html

david_aa

Hi,

I did this:

// Retrieves, appends the Start Date and Start Time and converts it to standard
CSPTDateTime objDateInitial;
dateInitial += " " + hourInitial;
objDateInitial.SetYMD(dateInitial, 2);

//Retrieves, appends the End Date and End Time and converts it to standard
CSPTDateTime objDateFinal;
dateFinal += " " + hourFinal;
objDateFinal.SetYMD(dateFinal, 2);

I need to concatenate the variable QString m_LinhaComando at: dateInitial string, string hourInitial and dateEnd, HourEnd

JKSH

Sorry, I don't understand your question.

You already know how to concatenate dateInitial with hourInitial (and you concatenated dateFinal with hourfFinal). What's the problem?

EDIT: Do you want to concatenate a std::string with a QString? Convert your std::string to a QString first. See the QString documentation for details.

david_aa

Hi,

Yes, I am concatenating the start date and start time as follows:

dateInitial += " " + hourInitial;
dateFinal += " " + hourFinal;

But, I need to concatenate in one variable so that it looks like for example:

Example:
m_LinhaComando = dateInitial += " " + hourInitial;dateFinal += " " + hourFinal;

Example:
m_LinhaComando = 2011/05/18 10:53:55.371;2012/09/22 10:57:32.168

JKSH

Use + instead of +=.

+= is the combination of concatenation and assignment.

The 2 pieces of code below both do the same thing. (This is basic C++)
@
// Technique #1:
dateInitial += " " + hourInitial;
@
@
// Technique #2:
dateInitial = dateInitial + " " + hourInitial;
@

david_aa

But this error occurs in this line:

QString m_LinhaComando;

Line: m_LinhaComando = dateInitial + " " + hourInitial;
Error: error C2679: binary '=' : no operator found which takes a right-hand operand of type 'std::basic_string<_Elem,_Traits,_Ax>' (or there is no acceptable conversion)

JKSH

Like I said before, you need to convert dateInitial and hourInitial to QString first. See the "QString documentation":http://qt-project.org/doc/qt-5/qstring.html on how to convert std::string to QString.

TT_NBE

First make sure all parts are QString:

for numbers this is
QString nr = QString::number(15);

for other types see the many constructors / static methods in QString.

Than use the "append" function of QString.

But I know if your used to java or c# this is a pain in the ...