Reading an XML document

[goetz]

I prefer hexdump with switch -C to show the output - I like hex numbers more than octal/decimal values. It's available on Macs by default.

try

@
hexdump -C x.xml
00000000 ff fe 3c 3f 78 6d 6c 20 76 65 72 73 69 6f 6e 3d |..<?xml version=|
@

If the file is long you can use the following to just print the first line:

@
head -1 yourfile.xml | hexdump -C
@

[tobias.hunger]

Volker: I need to nitpick, sorry...

Your hexdump seems to be utf-8 encoded, but "ff fe" is the UTF-16 encoded BOM (actually "ff fe" or "fe ff", depending on byte order).

In UTF-8 the proper encoding should be: "ef bb bf" (or in ISO-8859-1 the sequence of these characters: ). Note that a Byte Order Mark does not really makes sense in a bytewise encoding... so its use is actually discouraged in a utf-8 context. BOM in UTF-8 does break e.g. scripts on Unix systems which require the shebang to be first in a file.

[goetz]

Tobias, you're completely right and very welcome :-)
I better should have stated, that this is sample output of hexdump, not of valid utf-16. I must construct this stuff by hand, as none of my editors creates utf-16 with BOM :-/

[cazador7907]

I think that I've almost solved this problem. The issue was not BOM but that the dang fool program cant' seem to find the file to open it! I admit it. I am a dolt sometimes.

My question for the group though is how to I specify the relative path to the file? If I specify just the filename (with not path), it can't find it. The file is co-located with the rest of the source code so I would expect it to immediately locate the file. In the project explorer though, it appears under the "Other Files" node of the tree view. I suppose that I could hard code a file path but that would defeat the purpose of relative paths.

Source code is below.

@
Graph newGraph;
QString filename;
QFile file;

filename = "GraphData.xml";

file.setFileName(filename);
bool results = file.open(QIODevice::ReadOnly);

if(!results)
    qDebug() << file.errorString();
else
{
    Doing lots of good things .....

@

[Guest]

one way is to include your xml file in a resource file

[giesbert]

if you locate the file somewhere in the filesystem, you need a path. If you don't specify a path, the program normally looks in the current folder (from which the executable is started). I donÄ't know, whether that is your project folder.
MSVS uses the project folder as current directory.

[goetz]

If the file contents is static, you can add it to your application resources and use it in a QFile there:

@
QFile f(":/GraphData.xml");
@

See the docs on the "resource system":http://doc.qt.nokia.com/latest/resources.html for further details.

You can manage them nicely with Qt Creator too, then there is no need to fiddle around in the qrc XML file manually.

[perego]

Gostaria de saber se alguem consegue me explicar como eu faço pra baixar ou melhor salvar um arquivo xml via qhttp ou qurl etc

[goetz]

[quote author="perego" date="1306948065"]Gostaria de saber se alguem consegue me explicar como eu faço pra baixar ou melhor salvar um arquivo xml via qhttp ou qurl etc[/quote]

Please answer in English in this forum.

If you want to write in native language, please have a look at the respective forums.

[mgran]

[quote author="perego" date="1306948065"]Gostaria de saber se alguem consegue me explicar como eu faço pra baixar ou melhor salvar um arquivo xml via qhttp ou qurl etc[/quote]

"I wonder if someone can explain me how can i download or better to save a file via xml or qhttp qurl etc."

(from Google Translate)