Programming Forums > Application Development > C#

Eleo · Feb 16th, 2006, 4:22 AM

I've got a pretty large XML file containing a list of optical drives and their read offsets (what those are specifically is pretty inconsequential to what I'm trying to do at the moment so don't let it confuse you.)

(Toggle Plain Text)

<drivelist>
  <drive>
    <name>MemorexDVDMAXX1648AJ</name>
    <offset>+594</offset>
  </drive>
</drivelist>

Then in my program I want to find one of the drive elements based on a string (string driveName = MemorexDVDMAXX1648AJ

and then get the offset element and store it as an integer...

Now, I've Googled, and I've looked at a lot of XML tutorials and most of them are confusing the hell out of me. They all seem to go about things differently; some approaches are too complex or too long. I'm looking for a simple solution and I'm wondering if one exists since this is a read-only operation.

That said I would like to point out that the XML file itself is 4100 lines or so, and the method that is to be called to try to find a said drive in the XML file is going to be called perhaps hundreds of times. I looked through my Java book and it said there are two approaches to XML, DOM or SAX. Given the size of the XML file, I don't know if I should take the DOM or SAX route as it seems like a question of do I want to use a lot of processing power or a lot of RAM...

I can already tell this thread is going to confuse some people... Can anyone help me out here?

Dameon · Feb 16th, 2006, 6:26 AM

Could be done in a few lines using the XML namespace and XPath. Check out w3schools for an xpath tutorial.

Eleo · Feb 16th, 2006, 8:25 PM

Thanks, that worked well.

Feb 16th, 2006, 4:22 AM	#1
Eleo Newbie Join Date: Feb 2006 Posts: 6 Rep Power: 0	Find a matching element in an XML file I've got a pretty large XML file containing a list of optical drives and their read offsets (what those are specifically is pretty inconsequential to what I'm trying to do at the moment so don't let it confuse you.) (Toggle Plain Text) <drivelist> <drive> <name>MemorexDVDMAXX1648AJ</name> <offset>+594</offset> </drive> </drivelist> <drivelist> <drive> <name>MemorexDVDMAXX1648AJ</name> <offset>+594</offset> </drive> </drivelist> Then in my program I want to find one of the drive elements based on a string (string driveName = MemorexDVDMAXX1648AJ and then get the offset element and store it as an integer... Now, I've Googled, and I've looked at a lot of XML tutorials and most of them are confusing the hell out of me. They all seem to go about things differently; some approaches are too complex or too long. I'm looking for a simple solution and I'm wondering if one exists since this is a read-only operation. That said I would like to point out that the XML file itself is 4100 lines or so, and the method that is to be called to try to find a said drive in the XML file is going to be called perhaps hundreds of times. I looked through my Java book and it said there are two approaches to XML, DOM or SAX. Given the size of the XML file, I don't know if I should take the DOM or SAX route as it seems like a question of do I want to use a lot of processing power or a lot of RAM... I can already tell this thread is going to confuse some people... Can anyone help me out here?

Feb 16th, 2006, 6:26 AM	#2
Dameon Troll Join Date: Apr 2005 Location: Texas Posts: 732 Rep Power: 4	Could be done in a few lines using the XML namespace and XPath. Check out w3schools for an xpath tutorial. __________________ MD5(sig) = bcef75433db02e9ad9bf81d6f7c5c270

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Feb 16th, 2006, 8:25 PM	#3
Eleo Newbie Join Date: Feb 2006 Posts: 6 Rep Power: 0	Thanks, that worked well.

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Programming Forums > Application Development > C#

Find a matching element in an XML file