[program-l] Re: Visual Basic .net: getting XMLWriter not to access the Internet
- From: Doug Lee <dgl@xxxxxxxx>
- To: program-l@xxxxxxxxxxxxx
- Date: Tue, 17 May 2011 09:45:56 -0400
I believe UTF-8 can represent every character that UTF-16 can also
represent, just in less space.
On Tue, May 17, 2011 at 01:57:38PM +0100, Ian Sharpe wrote:
You can also use the Encoding.getBytes method in the System.Text namespace
when handling strings. However, I'm sure the XmlDocument class would honor
the UTF-16 character directive in an XML file?
For what it's worth though, UTF8 is a subset of UTF16 as far as I'm aware,
so unless your file contains any character represented by UTF16 and not
UTF8, (unlikely I suspect) you shouldn't have any issues anyway.
Cheers
Ian .
-----Original Message-----
From: program-l-bounce@xxxxxxxxxxxxx [mailto:program-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Pranav Lal
Sent: 17 May 2011 12:41
To: program-l@xxxxxxxxxxxxx
Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to access
the Internet
Ian,
Ignore the bit about specifying the encoding when using a xmlDocument.
I have found a way to do this using a XMLTextWriter. I will try it and
revert.
On 5/17/11, Pranav Lal <pranav.lal@xxxxxxxxx> wrote:
> Hi Ian,
>
> As for what I am trying to do, I have a third party component that
> outputs unformatted XML. I am using the XMLReader and XMLTextWriter
> classes to write out formatted XML. After that, I edit the XML using
> string manupulation. I find it easier to do then using the actual XML
> cklasses. I would be happy to use the xml document class. However, I
> cannot see how to output data from it as UTF-8. All strings in visual
> basic .net are set to UTF-16.
>
> Pranav
>
> On 5/17/11, Ian Sharpe <isforums@xxxxxxxx> wrote:
>> It's been a while since I've used these classes but am sure the
>> XmlReaderSettings class will have a validate property or something
>> like that. In general, I tended to use the XmlDocument class which I
>> found easier to work with with and didn't really have to worry about
>> performance.
>> Obviously it depends on exactly what you are trying to do. What
>> exactly are you trying to do by the way?
>>
>> In summary, you could try create a new XmlDocument object. Then use
>> the Load method to load an XML file from the filesystem or internet,
>> passing it the path/uri to the file. Or you can simply load raw XML
>> into the object using the LoadXml method, passing it an XML string.
>>
>> I can't remember off the top of my head but suspect that by default,
>> the Xml won't be validated. If I'm wrong, I think there's a Validate
>> property that you can set to false before loading the Xml.
>>
>> You will theen be able to work with the entire XmlDocument in memory.
>> If you file is large, this may be an issue.
>>
>> If you only want to extract parts of the Xml file, it may well be
>> much simpler to use an XSL transform. If you're not familiar with
>> XSL, this will be a steap learning curve but a good one in my view
>> and worth tackling.
>>
>> Cheers
>> Ian
>>
>> -----Original Message-----
>> From: program-l-bounce@xxxxxxxxxxxxx
>> [mailto:program-l-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Pranav Lal
>> Sent: 17 May 2011 11:50
>> To: program-l@xxxxxxxxxxxxx
>> Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to
>> access the Internet
>>
>> Hi Ian,
>> <snip
>> 1. It maybe that the XmlTextReader is validating the XML file and in
>> order to do this, it is looking for the scheme or DTD referrenced in
>> the XML file.
>> You could try turning validation off for the XmlTextReader.
>> PL] How do I do this? I know that I need to use a XMLReaderSettings
>> object but how do I apply that to the XMLTextWriter? I ask since the
>> XMLTextWriter does not have a suitable constructer. There is the
>> create method which takes a stream and a settings object but I can't
>> figure out how to put all of this together.
>>
>> Pranav
>>
>> On 5/17/11, Ian Sharpe <isforums@xxxxxxxx> wrote:
>>> Hi Pranav
>>>
>>>
>>> I am assuming that you are not interested in the resource that the
>>> XmlTextReader is going to the web to retrieve? Ie. That you are only
>>> interested in the raw XML data? Here are a couple of other
>>> suggestions that may help:
>>>
>>> 1. It maybe that the XmlTextReader is validating the XML file and in
>>> order to do this, it is looking for the scheme or DTD referrenced in
>>> the
>> XML file.
>>> You could try turning validation off for the XmlTextReader.
>>>
>>> 2. You could also simply remove the reference to the external file
>>> from the XML file before you try reading it.
>>>
>>> Obviously you run the risk of handling potentially invalid XML files
>>> but I suspect this won't be important in your scenario. If it is,
>>> then you could always retrieve the external resources with the XML
>>> file itself, save them all locally, and modify the references in the
>>> XML to point to the local copies. Again, if the schema changes, your
>>> app may fail, but then this would be the case if you were reading
>>> the validating anyway and would require changes to your code to
>>> allow for any
>> relevant changes anyway.
>>>
>>> Cheers
>>> Ian
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: program-l-bounce@xxxxxxxxxxxxx
>>> [mailto:program-l-bounce@xxxxxxxxxxxxx]
>>> On Behalf Of Pranav Lal
>>> Sent: 17 May 2011 01:51
>>> To: program-l@xxxxxxxxxxxxx
>>> Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to
>>> access the Internet
>>>
>>> Hi Ian,
>>>
>>> Yes and the code does not go out to the web. I have read some more
>>> and suspect that I need to set the xml resolver to nothing. I know
>>> that I have to use the xml reader settings object but cannot see how
>>> to do that.
>>>
>>> In addition, I tried switching to using the xmlDocument object since
>>> it is easy to set the resolver to nothing but that lead to a host of
>>> problems so I wont go there yet.
>>>
>>> Pranav
>>> -----Original Message-----
>>> From: program-l-bounce@xxxxxxxxxxxxx
>>> [mailto:program-l-bounce@xxxxxxxxxxxxx]
>>> On Behalf Of Ian Sharpe
>>> Sent: Monday, May 16, 2011 8:49 PM
>>> To: program-l@xxxxxxxxxxxxx
>>> Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to
>>> access the Internet
>>>
>>> Did you try the passing in the simplified XML I provided or
>>> something similar?
>>>
>>> Cheers
>>> ian
>>>
>>> -----Original Message-----
>>> From: program-l-bounce@xxxxxxxxxxxxx
>>> [mailto:program-l-bounce@xxxxxxxxxxxxx]
>>> On Behalf Of Pranav Lal
>>> Sent: 16 May 2011 15:49
>>> To: program-l@xxxxxxxxxxxxx
>>> Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to
>>> access the Internet
>>>
>>> Sorry,
>>>
>>> I have now tried setting standalone to "yes" without any success.
>>>
>>> Pranav
>>>
>>> -----Original Message-----
>>> From: program-l-bounce@xxxxxxxxxxxxx
>>> [mailto:program-l-bounce@xxxxxxxxxxxxx]
>>> On Behalf Of Soronel Haetir
>>> Sent: Monday, May 16, 2011 6:40 AM
>>> To: program-l@xxxxxxxxxxxxx
>>> Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to
>>> access the Internet
>>>
>>> Pranav,
>>>
>>> David was suggesting that you try setting standalone to "yes".
>>>
>>> On 5/15/11, Pranav Lal <pranav.lal@xxxxxxxxx> wrote:
>>>> Hi David and Ian,
>>>>
>>>> I have tried setting standalone="no" without any success. The
>>>> problem
>>> seems
>>>> to be that the program is going out to look for the document type
>>>> definition. I ran a network sniffer and can see this clearly. In
>>>> case
>>> anyone
>>>> is curious, I have uploaded the first packet my program sends to my
>>>> dropbox's public folder. You can get the text file containing the
>>>> packet from http://dl.dropbox.com/u/3688386/ProgramPackets.txt
>>>>
>>>> Pranav
>>>>
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>>>
>>>
>>> --
>>> Soronel Haetir
>>> soronel.haetir@xxxxxxxxx
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>
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--
Doug Lee dgl@xxxxxxxx http://www.dlee.org
SSB BART Group doug.lee@xxxxxxxxxxxxxxxx http://www.ssbbartgroup.com
No one alive is beyond hope; every second of life is a chance.
(08/29/02)
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