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how to get the value of an xml document element?

Posted on 2006-07-11
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Last Modified: 2013-11-19
hi,

i have an xml document and need to retrieve the value of a particular node. any one can tell me a neat way to retrieve it?

the xml document is as below:
<?xml version="1.0" encoding="UTF-8"?>
<connector_ret>
   <function name="contact_create">
      <ret_val name="c_id" type="integer">236939</ret_val>
   </function>
</connector_ret>


who can tell me how to retrieve that 236939 using c# or vb.net?

thanks
viola123
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Question by:viola123
9 Comments
 
LVL 16

Expert Comment

by:Swapnil Piparia
ID: 17080664
Hi viola123,
the best way is to write a code ti Querying XML Data with XQuery method in asp.net. You can get help from following article for how to do it.

http://aspnet.4guysfromrolla.com/articles/071603-1.aspx 


Regards,
NetSwap
0
 
LVL 5

Assisted Solution

by:vinodhsomasekharan
vinodhsomasekharan earned 350 total points
ID: 17080680
Hai,

Dim myXmlDoc As New XmlDocument
        Dim myXmlNode As XmlNode

        myXmlDoc.Load(<give u r xml file location/path here..>)

        myXmlNode = myXmlDoc.SelectSingleNode("//connector_ret/function[ @name='contact_create' ]/ret_val[ @name='c_id']" )
       
      myXmlNode.InnerText
u can get the value using   myXmlNode.InnerText  property..


hope this helps

Regards
Vinu
0
 
LVL 6

Accepted Solution

by:
Nandakumar Sakthivel earned 150 total points
ID: 17080682
Hi,

        Dim val As String
        Dim xmldoc As New XmlDocument
        xmldoc.Load("example.xml")
        Dim childElement As XmlElement
        childElement = xmldoc.SelectSingleNode("//connector_ret/function/ret_val")
        If (childElement.GetAttribute("name") = "c_id") Then
            val = childElement.InnerText()
        End If

You can use some thing like this

Hope this helps

Nanda
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Expert Comment

by:kaliyugkaarjun
ID: 17080775
0
 
LVL 6

Author Comment

by:viola123
ID: 17080941
thanks folks!!

but my xml is actually returned as a string. is there any way to load this xml string into xmldocument object?

viola123
0
 
LVL 5

Expert Comment

by:vinodhsomasekharan
ID: 17081027
myXmlDoc.LoadXML(string variable);
0
 
LVL 6

Author Comment

by:viola123
ID: 17081063
thanks vinodhsomasekharan :-)

but it does work here, the error msg is as below:

Unexpected XML declaration. The XML declaration must be the first node in the document, and no white space characters are allowed to appear before it. Line 2, position 3.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Xml.XmlException: Unexpected XML declaration. The XML declaration must be the first node in the document, and no white space characters are allowed to appear before it. Line 2, position 3.

Source Error:


Line 66:
Line 67:         XmlDocument xmldoc = new XmlDocument();
Line 68:         xmldoc.LoadXml(result);

 
//////////////////////
any comments??

thanks
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LVL 5

Expert Comment

by:vinodhsomasekharan
ID: 17081725
can u post what is the value in result variable?
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LVL 5

Expert Comment

by:vinodhsomasekharan
ID: 17081763
<?xml version="1.0" encoding="UTF-8"?>
the above line must be the very first line in the xmlstring "result"

ensure that there are no white spaces before or in the first line..

hope it helps u.

Regards
Vinodh
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