Accessing XML file using JavaScript And ASP.net |VB code

Posted by Bubba on Stack Overflow See other posts from Stack Overflow or by Bubba
Published on 2009-12-08T11:55:32Z Indexed on 2010/06/01 16:03 UTC
Read the original article Hit count: 282

Filed under:

ASP.NET

JavaScript

vb.net

Am trying to read in data from an xml file but using javascript which is embedded into my asp.net|vb code. I am new to asp.net but coming from a programming background.

so I declared the xml objects for the appropriate browsers, as well as the name of the local xml to read data from,
I then start by appending the create the table tag and then append it to the div tag in hack5.aspx
I declare the variable that will represent/ hold the xml returned data object.
I then run a for loop , before creating a row tag and then appending it to the div tag in hack5.aspx
I then create the a row tag and then appending it to the div tag in hack5.aspx
| then create a TextNode which is passed to variable, then create a td and append to div . then lastly append the textnode to td

this format is the same for creating another 13 td tags that are to hold the data.

The main problem is when I run the script - I see nothing display on my screen . no errors are shown, but with your sample code runs smoothly.

So the first file hack5.aspx is as follows:

<%@ Page Language="VB"
AutoEventWireup="false"
CodeFile="hack5.aspx.vb"
Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD
XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html
xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>Diplaying MessageBox from ASP.NET</title> </head> <body>
  <form id="form1" runat="server">
      <div id="showtime" >

      </div>
  </form> </body> </html>

The next file hack5.aspx.vb is as follows:

Partial Class _Default
	Inherits System.Web.UI.Page


	Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
	Dim scriptString as String = "<script language=JavaScript> if (window.XMLHttpRequest) " 
		scriptString += " { " 
		scriptString += "  xhttp=new XMLHttpRequest(); " 
		scriptString += "  } " 
			  scriptString += " else " 
		   scriptString += "  { " 
			 scriptString += "  xhttp=new ActiveXObject('Microsoft.XMLHTTP'); " 
			 scriptString += " } " 
	  scriptString += " xhttp.open('GET','yes.xml',false); " 
	  scriptString += " xhttp.send(null);" 
	  scriptString += " xmlDoc= xhttp.responseXML; "
	  scriptString += " var table1 = document.createElement('table'); "
	  scriptString += " document.getElementById('showtime').appendChild(table1); "
	  scriptString += " var x=xmlDoc.getElementsByTagName('Table'); " 

	scriptString += " for (i=0;i<x.length;i++) " 
	scriptString += "  { " 


		  scriptString += " var assessment = document.createTextNode(x[i].getElementsByTagName('Assessment')[0].childNodes[0].nodeValue);"

		  scriptString += " var row1 = document.createElement('tr'); "
		  scriptString += " document.getElementById('showtime').appendChild(row1); "
		  scriptString += " var column1 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column1); "
		  scriptString += " column1.appendChild(assessment); "



		  scriptString += " var Issue_Date = document.createTextNode(x[i].getElementsByTagName('Issue_Date')[0].childNodes[0].nodeValue);"

			 scriptString += " var column2 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column2); "
		  scriptString += " column2.appendChild(Issue_Date); "




		  scriptString += " var Due_Date = document.createTextNode(x[i].getElementsByTagName('Due_Date')[0].childNodes[0].nodeValue);"

			 scriptString += " var column3 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column3); "
		  scriptString += " column3.appendChild(Due_Date); "


			 scriptString += " var Interest = document.createTextNode(x[i].getElementsByTagName('Interest')[0].childNodes[0].nodeValue);"

			 scriptString += " var column4 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column4); "
		  scriptString += " column4.appendChild(Interest); "



		  scriptString += " var Summary = document.createTextNode(x[i].getElementsByTagName('Summary')[0].childNodes[0].nodeValue);"

			 scriptString += " var column5 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column5); "
		  scriptString += " column5.appendChild(Summary);"



		  scriptString += " var Amount_Due= document.createTextNode(x[i].getElementsByTagName('Amount_Due')[0].childNodes[0].nodeValue);"

			 scriptString += " var column6 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column6); "
		  scriptString += " column6.appendChild(Amount_Due);"



		  scriptString += " var IEduty = document.createTextNode(x[i].getElementsByTagName('IEduty')[0].childNodes[0].nodeValue);"

			 scriptString += " var column7 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column7); "
		  scriptString += " column7.appendChild(IEduty);"





		  scriptString += " var LEsurtax = document.createTextNode(x[i].getElementsByTagName('LEsurtax')[0].childNodes[0].nodeValue);"

			 scriptString += " var column8 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column8); "
		  scriptString += " column8.appendChild(LEsurtax);"



		  scriptString += " var CEsurtax = document.createTextNode(x[i].getElementsByTagName('CEsurtax')[0].childNodes[0].nodeValue);"

			 scriptString += " var column9 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column9); "
		  scriptString += " column9.appendChild(CEsurtax);"



		  scriptString += " var EXduty = document.createTextNode(x[i].getElementsByTagName('EXduty')[0].childNodes[0].nodeValue);"

			 scriptString += " var column10 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column10); "
		  scriptString += " column10.appendChild(EXduty);"




		  scriptString += " var IMvat = document.createTextNode(x[i].getElementsByTagName('IMvat')[0].childNodes[0].nodeValue);"

			 scriptString += " var column11 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column11); "
		  scriptString += " column11.appendChild(IMvat);"




		  scriptString += " var SYSfee = document.createTextNode(x[i].getElementsByTagName('SYSfee')[0].childNodes[0].nodeValue);"

			 scriptString += " var column12 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column12); "
		  scriptString += " column12.appendChild(SYSfee);"



		  scriptString += " var AItax = document.createTextNode(x[i].getElementsByTagName('AItax')[0].childNodes[0].nodeValue);"

			 scriptString += " var column13 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column13); "
		  scriptString += " column13.appendChild(AItax);"


		  scriptString += " var Cduty = document.createTextNode(x[i].getElementsByTagName('Cduty')[0].childNodes[0].nodeValue);"

			 scriptString += " var column14 = document.createElement('td'); "
		  scriptString += " document.getElementById('showtime').appendChild(column14); "
		  scriptString += " column14.appendChild(Cduty);"



   scriptString += "  } " 



   scriptString += " <"
   scriptString += "/"
                        scriptString += "script>"


  If(Not ClientScript.IsStartupScriptRegistered("clientScript"))

     ClientScript.RegisterClientScriptBlock(Me.GetType(),"clientScript", scriptString)

  End If


End Sub
End Class

And finally the xml file is as follows:

<?xml version="1.0" encoding="utf-8"
?>  <DataSet
xmlns="http://tempuri.org/">
<xs:schema id="NewDataSet" xmlns=""
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xs:element name="NewDataSet"
msdata:IsDataSet="true"
msdata:UseCurrentLocale="true">
<xs:complexType> <xs:choice
minOccurs="0" maxOccurs="unbounded">
<xs:element name="Table">
<xs:complexType> <xs:sequence>  
<xs:element name="UserName"
type="xs:string" minOccurs="0" />   
<xs:element name="Password"
type="xs:string" minOccurs="0" />   
<xs:element name="UserLevel"
type="xs:string" minOccurs="0" />   
<xs:element name="FName"
type="xs:string" minOccurs="0" />   
<xs:element name="LName"
type="xs:string" minOccurs="0" />   
<xs:element name="Branch"
type="xs:string" minOccurs="0" />   
<xs:element name="Department"
type="xs:string" minOccurs="0" />   
</xs:sequence>   </xs:complexType>  
</xs:element>   </xs:choice>  
</xs:complexType>   </xs:element>  
</xs:schema> <diffgr:diffgram
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"
xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
<NewDataSet xmlns="">   <Table
diffgr:id="Table1"
msdata:rowOrder="0">
  <Assessment>CHR/A157/2009</Assessment>

  <Issue_Date>20/10/2009</Issue_Date> 
  <Due_Date>01/11/2009</Due_Date> 
  <Interest>2.00</Interest> 
  <Summary>BENTLEY 2009</Summary> 
  <Amount_Due>28000000.00</Amount_Due> 
  <IEduty>3000000.00</IEduty> 
  <LEsurtax>4000000.00</LEsurtax> 
  <CEsurtax>5000000.00</CEsurtax> 
  <EXduty>0.00</EXduty> 
  <IMvat>5000000.00</IMvat> 
  <SYSfee>8000000.00</SYSfee> 
  <AItax>2000000.00</AItax> 
  <Cduty>1000000.00</Cduty> 
   </Table>   <Table diffgr:id="Table1"
msdata:rowOrder="1">
  <Assessment>CHR/A167/2009</Assessment>

  <Issue_Date>20/10/2009</Issue_Date> 
  <Due_Date>01/11/2009</Due_Date> 
  <Interest>2.00</Interest> 
  <Summary>BENTLEY 2009</Summary> 
  <Amount_Due>24000000.00</Amount_Due> 
  <IEduty>3000000.00</IEduty> 
  <LEsurtax>4000000.00</LEsurtax> 
  <CEsurtax>5000000.00</CEsurtax> 
  <EXduty>0.00</EXduty> 
  <IMvat>1000000.00</IMvat> 
  <SYSfee>8000000.00</SYSfee> 
  <AItax>2000000.00</AItax> 
  <Cduty>1000000.00</Cduty> 
   </Table>
  <Table diffgr:id="Table1" msdata:rowOrder="2">
  <Assessment>CHR/A196/2009</Assessment>

  <Issue_Date>11/11/2009</Issue_Date> 
  <Due_Date>21/11/2009</Due_Date> 
  <Interest>2.00</Interest> 
  <Summary>BENTLEY 2009</Summary> 
  <Amount_Due>20000000.00</Amount_Due> 
  <IEduty>3000000.00</IEduty> 
  <LEsurtax>4000000.00</LEsurtax> 
  <CEsurtax>5000000.00</CEsurtax> 
  <EXduty>0.00</EXduty> 
  <IMvat>1000000.00</IMvat> 
  <SYSfee>4000000.00</SYSfee> 
  <AItax>2000000.00</AItax> 
  <Cduty>1000000.00</Cduty> 
   </Table>   </NewDataSet>  </diffgr:diffgram> </DataSet>

Developer IT