Re: How to Parse XML File
- From: stcheng@xxxxxxxxxxxxxxxxxxxx (Steven Cheng [MSFT])
- Date: Tue, 17 Jun 2008 02:24:30 GMT
Hi David,
Tim provided some suggestion about using XmlTextReader, that is quite good
for memory restricted condition since it avoid loading the envire XML
document into memory. If memory is not the problem, and you have ample
memory to hold the entire XMLdocument, you can consider load the file into
XmlDocument and than perform XPath query to get all the expected
elements/nodes. Here are some good articles introducing execute Xpath query
via .NET xml document or xpath navigator classes:
#.NET and XML: XPath Queries
http://www.developer.com/xml/article.php/3383961
#Easily navigate XML with VB.NET and XPath
http://articles.techrepublic.com.com/5100-10878_11-5035074.html
#INFO: Roadmap for Executing XPath Queries in .NET Applications
http://support.microsoft.com/kb/313828
for your sample xml file here, I've written a simple console app to
demonstrate how to query all the batch elements(and its inner tktamount and
all the items ...)
class Program
{
static void Main(string[] args)
{
Run_DOM();
}
static void Run_DOM()
{
XmlDocument doc = new XmlDocument();
doc.Load(@"..\..\data.xml");
//query all batches...
XmlNodeList batches = doc.SelectNodes("//Batches/Batch");
if(batches!= null)
foreach (XmlNode batch in batches)
{
//for each batch, get Nbr and TktAmount
XmlNode Nbr = batch.SelectSingleNode("./BatchNbr");
XmlNode Amount =
batch.SelectSingleNode("./BatchTktAmount");
Console.WriteLine("######BatchNbr:{0},
BatchTktAmount:{1}#######",
Nbr.InnerText, Amount.InnerText);
//query items of the batch
Console.WriteLine("\tItems:");
XmlNodeList items = batch.SelectNodes("./Items/Item");
foreach (XmlNode item in items)
{
XmlNode isn = item.SelectSingleNode("./ISN");
XmlNode amt = item.SelectSingleNode("./Amount");
Console.WriteLine("\t\tISN:{0}, Amount:{1}"
, isn.InnerText, amt.InnerText);
}
}
}
}
<<<<<<<<<<<<<<<<<<<<<<<<<<
Also, I saw that in Tim's new reply, he mentioned the X-LINQ
feature(provided in .NET 3.5). That is a new XML DOM based processing API
which can do the same thing as the above DOM code(but with different api
and syntax), if you have interests, you can also have a look at LINQ/LINQ
TO XML over MSDN:
#NET Language-Integrated Query for XML Data
http://msdn.microsoft.com/en-us/library/bb308960.aspx
Hope this also helps.
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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--------------------
From: =?Utf-8?B?RGF2aWRN?= <DavidM@xxxxxxxxxxxxxxxxxxxxxxxxx><GZ6dnYbKNqAVMMvVnZ2dnUVZ8vednZ2d@xxxxxxxxxxxxxx>
References: <6BFCD91B-C8ED-417F-AB64-6911DD0A9EE9@xxxxxxxxxxxxx>
Subject: Re: How to Parse XML File
Date: Mon, 16 Jun 2008 12:19:02 -0700
article.
John -- thanks for your reply. I'm reading it now and like the DDJ
do
"John Timney (MVP)" wrote:
If you can convert it into a dataset, then you can easily bind to it and
http://devpinoy.org/blogs/keithrull/archive/2008/04/17/howto-convert-an-xml-usual DB type stuff with its values
string-to-dataset.aspx
that I
http://www.ddj.com/windows/184416669
Regards
John Timney (MVP)
http://www.johntimney.com
http://www.johntimney.com/blog
"DavidM" <DavidM@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:6BFCD91B-C8ED-417F-AB64-6911DD0A9EE9@xxxxxxxxxxxxxxxx
Hello, I have an XML file generated from a third party application
setup towould like to parse. Ideally, I plan on having a windows service
"BatchTktAmount>scan various folders for XML files and parse the file, then spit out
totals.
Since I haven't worked with XML too much in C#, I'm trying to develop a
structured and easy-to-read way to parse the file.
Essentially, I would like to read the file and add the
totalsfor
any <Batch> elements that may exist. There could be 1 or more...
As a verification, I may also want to add the <BATCH\Items> elements,
there
could be 1 or more, and if <Gender> is a credit "CR", accumulate
howfor
credit items. If <Gender> is a debit "DR", acculate totals for debit
items.
Total items should equal the total batches.
I guess if I had relatively good XML parsing code, I could figure out
.
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