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Problem with null records in xml in visual basic

Posted on 2009-02-17
Medium Priority
Last Modified: 2012-05-06
I have e problem with some xml rows.

My xml like

I dont have eventtype ChildNodes in each row.. but I when I want to get this data I got a error.

When I want to read this xml with  selectnodes like..

m_nodelist = m_xmld.SelectNodes("//eventlist/event")
dim lig as xmlnode
 For Each lig In m_xmld.SelectNodes("//eventlist/event")


then I dot a error like this

System.NullReferenceException: Object reference not set to an instance of an object. at ParsingUsingXmlDocument.Main()

how can I know null eventtype rows..
Question by:ftopcu

Accepted Solution

sanginfotech earned 500 total points
ID: 23659146
Ur second 'event' row does not contain 'eventtype' element in it. Hence the error. Simply put an if condition to check 'eventtype' element exists in the node or not. Other way to do it is put whole "//eventlist/event/eventtype" in ur XPath query... Check the code below

'''******Using if condition
Dim objDocument As New XmlDocument
        objDocument.Load("C:\Documents and Settings\Administrator\Desktop\Test.xml")
        For Each objNode As XmlNode In objDocument.SelectNodes("//eventlist/event")
            If Not objNode("eventtype") Is Nothing Then
            End If
'''******Using "//eventlist/event/eventtype" xpath
Dim objDocument As New XmlDocument
        objDocument.Load("C:\Documents and Settings\Administrator\Desktop\Test.xml")
        For Each objNode As XmlNode In objDocument.SelectNodes("//eventlist/event/eventtype")

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Author Comment

ID: 23659172
 If Not objNode("eventtype") Is Nothing Then
   End If

its solved my problem ..

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