C# Linq over XML => Lambda Expression

Question

I have an xml document which consists of a number of the following:

- <LabelFieldBO>
  <Height>23</Height> 
  <Width>100</Width> 
  <Top>32</Top> 
  <Left>128</Left> 
  <FieldName>field4</FieldName> 
  <Text>aoi_name</Text> 
  <DataColumn>aoi_name</DataColumn> 
  <FontFamily>Arial</FontFamily> 
  <FontStyle>Regular</FontStyle> 
  <FontSize>8.25</FontSize> 
  <Rotation>0</Rotation> 
  <LabelName /> 
  <LabelHeight>0</LabelHeight> 
  <LabelWidth>0</LabelWidth> 
  <BarCoded>false</BarCoded> 
  </LabelFieldBO>

I have figured out how to find the element where LabelName = 'container'. But I am not well versed with lambda expressions and would like to know how to access the information within my LINQ results. Lambda expressions may not be the way to go either. I am open to any suggestions.

var dimensions = from field in xml.Elements("LabelFieldBO")
                             where field.Element("LabelName").Value == "container"
                             select field;

Thanks.

EDIT: What I am trying to figure out is how to get the LabelHeight and LabelWidth out of the XML where LabelName = "container"

It is not exactly clear what you want to do, could you please describe it a bit more exact. Possible with samples of the results that you are expecting. — AxelEckenberger
– AxelEckenberger, Commented Mar 5, 2010 at 20:45

AxelEckenberger · Accepted Answer · 2010-03-05 21:13:08Z

5

The following code create a new anonymous object that contains the label name, width, and height.

var result = doc.Elements("LabelFieldBo")
                 .Where(x => x.Element("LabelName").Value == "container")
                 .Select(x =>
                     new { 
                         Name = x.Element("LabelName").Value,
                         Height = x.Element("LabelHeight").Value,
                         Width = x.Element("LabelWidth").Value
                 }
             );

answered Mar 5, 2010 at 21:13

AxelEckenberger

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Comments

David Brown · Accepted Answer · 2010-03-05 21:27:36Z

from field in xml.Elements("LabelFieldBO")  
where field.Element("LabelName").Value == "container"  
select new   
{  
    LabelHeight = field.Element("LabelHeight").Value,  
    LabelWidth = field.Element("LabelWidth").Value  
}

This returns an IEnumerable of anonymous types with two properties (LabelWeight and LabelWidth). Each object in the IEnumerable represents a LabelFieldB0 with LabelName = "container".

So, you can "get at" your data doing something like:

var containerLabels =   
    from field in xml.Elements("LabelFieldBO")  
    where field.Element("LabelName").Value == "container"  
    select new   
    {  
        LabelHeight = field.Element("LabelHeight").Value,  
        LabelWidth = field.Element("LabelWidth").Value  
    } 

foreach (var containerLabel in containerLabels)  
{  
    Console.WriteLine(containerLabel.LabelHeight + " "
        + containerLabel.LabelWidth);  
}

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