Need to get a particular value from XML

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I have followed many tutorials here on LINQ to XML http://www.dotnetcurry.com/showarticle.aspx?ID=564[^]

The terminology for the XML documents is confusing.
Could someone please help me to write the code snippet that would extract the "Name" value from this xml based on a condition for example.

I need colSDate and colAcqDate because Visible is True but not colSeqNo because it does not have the Visible property or it is set to False.

XML

<XtraSerializer version="1.0" application="View">
  <property name="#LayoutVersion" />
  <property name="ActiveFilterEnabled">true</property>
  <property name="Columns" iskey="true" value="286">
    <property name="Item1" isnull="true" iskey="true">
      <property name="Name">colSeqNo</property>
    </property>
    <property name="Item2" isnull="true" iskey="true">
      <property name="Visible">true</property>
      <property name="VisibleIndex">0</property>
      <property name="Name">colSDate</property>
    </property>
    <property name="Item3" isnull="true" iskey="true">
      <property name="Visible">true</property>
      <property name="VisibleIndex">1</property>
      <property name="Name">colAcqDate</property>
    </property>
  </property>
  <property name="ActiveFilterString" />
  <property name="GroupSummarySortInfoState" />
  <property name="FindFilterText" />
  <property name="FindPanelVisible">false</property>
</XtraSerializer>

I am trying to write some reasonably performing data access code but the absurd requirements are making it difficult. Any help is extremely appreciated. Thanks in advance.

Posted 30-May-14 6:21am

RSIBrian2014

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Comments

Rob Philpott 30-May-14 12:25pm

Why is every element called property??

RSIBrian2014 30-May-14 12:28pm

That is part of what makes it difficult and something I have no control over. This is created from an XtraGrid and that is how they did it for some stupid reason.

Sergey Alexandrovich Kryukov 30-May-14 12:33pm

Nothing difficult. It is a reasonable approach for some designs...
—SA

RSIBrian2014 30-May-14 12:36pm

Any suggestions for extracting the data?

Sergey Alexandrovich Kryukov 30-May-14 16:59pm

How about my answer? There is nothing difficult in "extracting" as well. You better parse, not "extract". Even better, use Data Contract.
—SA

2 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-05-30T06:36:00

You can use different approaches to XML parsing. Here is my short overview of them:

Use System.Xml.XmlDocument class. It implements DOM interface; this way is the easiest and good enough if the size if the document is not too big.
See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^].
Use the class System.Xml.XmlTextReader; this is the fastest way of reading, especially is you need to skip some data.
See http://msdn.microsoft.com/en-us/library/system.xml.xmlreader.aspx[^].
Use the class System.Xml.Linq.XDocument; this is the most adequate way similar to that of XmlDocument, supporting LINQ to XML Programming.
See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^], http://msdn.microsoft.com/en-us/library/bb387063.aspx[^].

Not always you need to work at XML level. Sometimes you can use available XML serialization. Please see:
http://msdn.microsoft.com/en-us/library/ms733127.aspx[^].

See also my past answers:
Creating property files...[^],
How can I utilize XML File streamwriter and reader in my form application?[^].

—SA

RSIBrian2014 · Answer 2 · 2014-05-30T08:56:00

Solution 2

SQL

Dim result = From d In xml.Descendants
             Where d.Attribute("name").Value = "Visible" AndAlso
                   d.Value = "true"
             From e As XElement In d.Parent.Elements
             Where e.Attribute("name").Value = "Name"
             Select e.Value

Posted 30-May-14 8:56am