[program-l] Re: Visual Basic .net: getting XMLWriter not to access the Internet
- From: "Ian Sharpe" <isforums@xxxxxxxx>
- To: <program-l@xxxxxxxxxxxxx>
- Date: Tue, 17 May 2011 13:49:26 +0100
OK, this definitely sounds like a job for XSL. Or at least manipulating the
XML DOM using XmlDocument. If you just want to use string manipulation, why
bother formatting it anyway? Just read it in as a string and process the
string. I really would recommend that you use XSL or DOM manipulation
though. All the sorts of things you might want to do will be far easier and
more reliable using either of these approaches. Unless you just want to
change one or two values that can easily be identified, in which case, don't
bother with XML anything. Just process the file as a string.
Cheers
Ian
-----Original Message-----
From: program-l-bounce@xxxxxxxxxxxxx [mailto:program-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Pranav Lal
Sent: 17 May 2011 12:19
To: program-l@xxxxxxxxxxxxx
Subject: [program-l] Re: Visual Basic .net: getting XMLWriter not to access
the Internet
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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