Reading an XML document
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Well, the project is located on a thumb drive so that I can work on the program from multiple computers. Do you think that that is the cause?
How would I be able to tell if there is a unicode byte order mark at the beginning?
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Right. Based on everyone's replies, I did two things.
I downloaded a program from the Mac site called EditiX (to create a new XML document) and then downloaded a Hex Editor to make sure that if a BOM was prepended to the file, I could strip it out. The new file text is below.
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<?xml version="1.0" encoding="UTF-8"?>
<Cities>
<City name="Chicago" heuristic="2132"/>
<City name="St. Louis" heuristic="2056"/>
<City name="Shreveport" heuristic="2101"/>
<City name="New Orleans" heuristic="2198"/>
</Cities>
@However, I'm still receiving the same error. I don't have access to the the program code at the moment but will post it later this afternoon.
Thanks for the fast responses. It's a very bumpy road right now, but I'm learning fast.
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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
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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:
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head -1 yourfile.xml | hexdump -C
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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.
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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.
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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 .....@
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one way is to include your xml file in a resource file
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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. -
If the file contents is static, you can add it to your application resources and use it in a QFile there:
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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.
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[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.
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[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)