[Qt-interest] Have QXmlStreameWriter write the encoding information

[Lingfa Yang]

Marc Balmer wrote:
> Am 29.05.2009 um 16:13 schrieb Marc Balmer:
>
>   
>> Am 29.05.2009 um 15:40 schrieb Andreas Pakulat:
>>
>>     
>>> On 29.05.09 14:19:57, Marc Balmer wrote:
>>>       
>>>> Am 29.05.2009 um 14:16 schrieb Marc Balmer:
>>>>
>>>>         
>>>>> Hi
>>>>>
>>>>> When I create a XML data stream using QXmlStreamWriter, my stream
>>>>> starts with
>>>>>
>>>>> <?xml version="1.0"?>
>>>>>
>>>>> How can I add the encoding information, so that I get
>>>>>
>>>>> <?xml version="1.0" encoding="UTF-8"?>
>>>>>
>>>>>           
>>>> I forgot to add my code, so here is the snippet:
>>>>
>>>> QXmlStreamWriter xml(&xmlData);
>>>> xml.setAutoFormatting(true);
>>>> xml.setCodec("UTF-8");
>>>> xml.writeStartDocument();
>>>>
>>>> xml.writeStartDocument() does not output the encoding information.
>>>>         
>>> Did you try with a different encoding? The reason it doesn't write  
>>> the
>>> encoding out could be that XML standard demands utf-8 to be used
>>> during
>>> parsing if no encoding attribute is set. Hence the xml writer just
>>> avoids
>>> "stating the obvious".
>>>       
>> that is not true.  If I set the codec to ISO-8859-1 and output Latin1
>> data, it still
>> does not write the encoding.
>>     
>
> Soe does anyone on this list have an idea how I can get the encoding
> information to be written?  Or is it time to file a bug report?
>
> - Marc Balmer
>
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>   
What you want is a processing instruction line, so you should call 
writeProcessingInstruction(), i.e.
    xml.writeProcessingInstruction("xml", "version=\"1.0\" 
encoding=\"UTF-8\"");
That's it.
Lingfa