[SOLVED] Strange QString issue: seems not to be closed ...

Hatchi

Dear all

I encountered a strange issue when using QTextStream in combination with QString. It seems like the QString is not properly closed ...

This is the code:
@file.setFileName(fileNameCarePathwayData);
if(file.open(QFile::ReadOnly | QFile::Text))
{
stream.setDevice(&file);

while(!stream.atEnd())
{
line=stream.readLine();
}

}
@

When using this code the majority of lines seem O.K. (an example is the following line):
"1234567 2222 VR 220110 1708 0083 Z32T A0410503UITSCHEIDING: R 123456 PAN MA KOFFI ******** 3K2104T "

However some lines seem like not properly formed QStrings (an example is the following line, you can see that there was no closing quotes printed by the qDebug()):
"1234567 0000 VR 220110 1708 0137 Z32 A5601693GEWICHT/LENGTE 123456

When I tried to do operations on these not properly formed QStrings like extracting parts of it or appending to other QStrings, the behavior was unpredictable ...

Could anybody give a suggestion to solve this problem?

SGaist

Hi,

Are you sure that your file contains only printable characters ?

Hatchi

Dear Sir

When I open the file with NotePad all symbols are displayed properly. The txt file which I try to read was output of a database extraction. Which type of (hidden) characters can cause this problem?
The problem only appears in certain places of the file, however in these places I see nothing special in NotePad. How can I find out if there are non-printable characters here and which characters these are?

Thanks in advance
Hatchi

SGaist

You can analyze the content of the file with an hex editor for example

Hatchi

Dear Sir

I used the free hex editor neo and I analyzed the lines which caused problems. They contained the hex code 00 multiple times. In the hex editor this character was displayed as a dot. For the rest I see nothing abnormal. Could it be that Qt has problems with this hex code 00?

Is there some way to solve this problem programatically or should I replace this hex code in all data file by 20?

Thanks
Hatchi

SGaist

It's not a problem of Qt, 0x0 is a string termination char. Depending on what you want to do with the data, you'd rather use a QByteArray

Hatchi

I solved the problem by opening the files with notepad and saving them again. Notepad replaces automatically all 00 by 20.

Thanks once more :)