C-Sharp (C#) Group: Parsing class doc

On 5/5/06, tyjunior <gmail.com">cppisfungmail.com> wrote:

Hello, I'm given this XML document that contains a People class that
consist of teachers, students and TA's and I wanted to build up a
classes list of the information provided by that document to list out
the teachers, all its students and TA's that is associated with the
same classes.

//////Example input:

&lt;People>;
 &nbsp; &nbsp; &nbsp;  <Person>
&nbsp;   ; &nbsp; &nbsp; &nbsp; <First&gt; M</First>
 ; &nbsp; &nbsp; &nbsp; &nbsp;   ;<Last&gt; Burns </Last&gt;
 &nbsp;   ; &nbsp; &nbsp; &nbsp; &lt;Handle&gt; MBurns </Handle>
&nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp;<Teach> biology </Teach>
   ; &nbsp; &nbsp; &nbsp; &nbsp; <Teach&gt; chemistry </Teach>
   ; &nbsp;  </Person>
 ; &nbsp; &nbsp;  <Person>
   ; &nbsp; &nbsp; &nbsp;  <First&gt; Lista </First>
   ; &nbsp; &nbsp; &nbsp;  <Last&gt; Simpson </Last&gt;
   ; &nbsp; &nbsp; &nbsp;  <Handle> Lsimpson </Handle>
 ; &nbsp; &nbsp; &nbsp; &nbsp;  <TA> biology </TA>;
 &nbsp; &nbsp; &nbsp;   ;  <Student> history </Student>
&nbsp; &nbsp; &nbsp; &nbsp;   ; <Student> english </Student>
&nbsp; &nbsp; &nbsp;  </Person>
&nbsp; &nbsp; &nbsp;  <Person>
   ; &nbsp; &nbsp; &nbsp; &lt;First>; Homer </First>
   ; &nbsp; &nbsp; &nbsp; &lt;Last> Simpson </Last&gt;
 &nbsp;   ; &nbsp; &nbsp; &lt;Handle>; HSimposon </Handle>
 ; &nbsp; &nbsp; &nbsp; &nbsp; <Student> writing </Student>
&nbsp; &nbsp; &nbsp;   ; &nbsp;<Student> biology </Student>
&nbsp; &nbsp; &nbsp; &nbsp;   ;<Student> art </Student>
&nbsp; &nbsp; &nbsp;  </Person>
</People>

/////Example Output:

&lt;Classes&gt;
 &nbsp;   ; &nbsp; <;Class>
 &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &lt;Name>biology</Name>
&nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;  <Teach>MBurns</Teach>
&nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp;<TA&gt;Lsimpson</TA>
 &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &lt;Student&gt;HSimposon</Student>
 ; &nbsp; &nbsp; &nbsp; &lt;/Class&gt;
</Classes


I believe there is an XML reader built int C# ? I wasn't sure how to
start the parsing process. Thank you




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On 5/6/06, tyjunior <gmail.com">cppisfungmail.com > wrote:

The code that your provided is XLST right? It's not the C# program that
would parse the XML document right? I think afterwards I would like an
XLST that would take the output generated by C# and turn it into a
nicely formatted HTML document. I'm still trying to start on the
parsing using C#.



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On 5/7/06, Liam Leane <gmail.com">greapygmail.com > wrote:

That XSL will parse the XML and output the desired XML structure. If you want to do it entirely in c# you want the XmlTextReader or XPathDocument class (stay clear of XmlDocument, there is no better way of destroying application performance then using it).

In terms of the XmlTextReader class it is forward only (which means you can't use XPath to query it) and will not validate the XML structure. Coding with it is somewhat like coding with recordsets in classic asp in that you you extract some data, move next and loop until you reach end of file. Obviously because it is multi-dimensional data the story is a little more complicated then that. Basicly your logic would go something like:

XmlTextReader xtr = Load the Xml

while(xtr.Read())
{

}

On 5/6/06, tyjunior <gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">cppisfungmail.com > wrote:

The code that your provided is XLST right? It's not the C# program that
would parse the XML document right? I think afterwards I would like an
XLST that would take the output generated by C# and turn it into a
nicely formatted HTML document. I'm still trying to start on the
parsing using C#.

On 5/8/06, tyjunior <gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"> cppisfungmail.com > wrote:

I tried that tutorial that you gave me and they used html output with
links and I was trying to follow along but I got stuck at some places
and was wondering if you can take a look at what I have and maybe
clarify some things if I'm doing it incorrectly.

[code]
using System;
using System.XML;
using System.Text;

//reads XML document from command line arg[1]
XmlTextReader xtr = Load the Xml;

//var to keep track of People In Classes
NameValueCollection PeopleOnClasses;

//var to keep track of People teaching classes
NameValueCollection PeopleTeachingClasses;

//var to keep track of people TA classes
NameValueCollection TAForClasses;

//string handler
string strHandle;

//skip white space and move to content
xtr.MoveToContent();

//call read func to start reading
while(xtr.Read())
{
&nbsp; &nbsp; &nbsp; &nbsp; //checks for people tag and also is a root node
 ; &nbsp; &nbsp; &nbsp; if(xtr.Name == "People" && xtr.NodeType == XmlNodeType.Element)
  ; &nbsp; &nbsp; &nbsp;{
 ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp;//retrieve the name of the course
&nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;if(xtr.Name == "Person")
&nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; {
&nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; strHandle = xtr.ReadString ();
  ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; }
&nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; //person name that is teaching course
&nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;if(xtr.Name == "Handle")
&nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; {
&nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; PeopleTeachingClasses = xtr.ReadString ();
  ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; }
&nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; //whos teaching course
&nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;if(xtr.Name == "Teach")
&nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;  {
&nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; PeopleTeachingClasses.Add(NodeValue, strHandle);
 &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ;}
 &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ;if(xtr.Name == "TA&quot;)
 ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp;{

 ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp;}
   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp;if(xtr.Name == "Student")
  ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; {

  ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; }
&nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;   ; //check for ending tag
 ; &nbsp; &nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp;if(xtr.Name == "People" && xtr.NodeType == XmlNodeType.EndElement)
 &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp; {

 &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp; }
 &nbsp; &nbsp; &nbsp;  }
&nbsp; &nbsp; &nbsp;   ;//output the data
}
&nbsp; &nbsp; &nbsp;   ; &nbsp; &nbsp; &nbsp; &nbsp;//closes the stream
&nbsp; &nbsp;   ; &nbsp;xtr.Close();
[/code]

Specifically, I wans't sure how to add the sub-tags to the main tag of
a "Person", as you can see I know that you just have to find the root
node which is "Person" and then traverse in and continue addign the
sub-tags to the main root, once you find an ending tag of "Person" you
would then output the data and continue to the next, once you're done
with that you would want to close up the stream.



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