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Asked: 2026-05-29T06:05:27+00:00

I have following xml: <TextWithNodes><Node id=0 />astralis<Node id=8 /> <Node id=9 />ltd<Node id=12 />

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I have following xml:

<TextWithNodes><Node id="0" />astralis<Node id="8" /> <Node id="9" />ltd<Node id="12" />
<Node id="14" />{<Node id="15" />DOCUMENT<Node id="23" />}<Node id="24" /> <Node id="25" />{<Node id="26" />TYPE<Node id="30" />}<Node id="31" />EX-<Node id="34" />10<Node id="36" />.<Node id="37" />12<Node id="39" /> <Node id="40" />{<Node id="41" />SEQUENCE<Node id="49" />}<Node id="50" />3<Node id="51" /> <Node id="52" />{<Node id="53" />FILENAME<Node id="61" />}<Node id="62" />e<Node id="63" />300201<Node id="69" />_<Node id="70" />ex<Node id="72" />10<Node id="74" />-<Node id="75" />12<Node id="77" />.<Node id="78" />txt<Node id="81" /> </TextWithNodes>

and I need to pick node from Id 25 to id 75. It is a portion of XML. Original XML is very long.

I am using following code:

Dim reader As XmlTextReader = New XmlTextReader(System.Web.HttpContext.Current.Server.MapPath("~/App_Data/gate_xml_output.xml"))

            reader.WhitespaceHandling = WhitespaceHandling.None

            Dim xmlDoc As XmlDocument = New XmlDocument()
            'Load the file into the XmlDocument
            xmlDoc.Load(reader)
            'Close off the connection to the file.
            reader.Close()

  Dim nodeList As XmlNodeList = xmlDoc.SelectNodes("//TextWithNodes/node()[preceding-sibling::Node[@id=" & startNode & "] and following-sibling::Node[@id=" & endNode & "]]")

            Dim sb As StringBuilder = New StringBuilder

            For Each childNode As XmlNode In nodeList
                If childNode.Value IsNot Nothing Then
                    sb.Append(childNode.Value & " ")
                End If
            Next

            ' read the text between these nodes
            ExtractText = sb.ToString

It is working but It is very slow. Any alternative of getting this data from XML ?

Please suggest.

Thanks

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1 Answer

  1. Editorial Team

    Explore Linq to XML; it should be quicker: http://msdn.microsoft.com/en-us/library/bb387098.aspx

    Also good info here: http://www.hookedonlinq.com/LINQtoXML5MinuteOverview.ashx

    There’s ton of info out there.

    Here’s an article about performance comparison with xmldoc and xmlreader: http://www.nearinfinity.com/blogs/joe_ferner/performance_linq_to_sql_vs.html

    and another: http://msdn.microsoft.com/en-us/library/bb387048.aspx

    +1

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