Question

I’m trying to display three columns in a DataGridView.
Here is a sample of my XML:

<root>
<string id = "STRING_ID">
    <node1> Some data </node1>
    <node2>
        <type>data</type>
    </node2>
    <Translations>
       <language name="ARABIC">
           <value>Some data</value>
           <date_last_changed>7-4-2011</date_last_changed>
       </language>
       <language name="CHINESE">
        ...
        ...
    </Translations>
</string>

<string id = "...">
   ...
   ...

The first column I want to display is the string id, an attribute value.
The second column I want to display is the <value> data for each string where <language name> is equal to ENGLISH_US.
The third column I want to display is the <value> data for each string where <language name> is equal to the currently selected item in a ComboBox (populated with the names of each of the languages).

This is my Linq query at the moment:

var query_Id = from va in xdoc.Descendants("language")
                       where va.Attribute("name").Value == ("ENGLISH_US")
                     select new
                     {
                         StringID = va.Parent.Parent.Attribute("id").Value,
                         English = va.Element("value").Value,
                         Custom = <incomplete>
                     };

The problem with this is that while this gives me the first two columns, I cannot think of a way to get the third. In essence, I am searching for a solution that looks something like several selects based on things like WHERE language name = "VALUE" etc. Something simple.

Answer 1

This should work. (You might want to add some error checking on the SingleOrDefault)

  var query = from va in xdoc.Descendants("language")
              select new
              {
                StringID = va.Parent.Parent.Attribute("id").Value,
                Language = va.Attribute("name").Value,
                LanguageData = va.Element("value").Value,
              };

  var query2 = from x in query
               group x by x.StringID into xg
               select new
               {
                 StringID = xg.Key,
                 English = xg.SingleOrDefault(x => x.Language == "ARABIC").LanguageData,
                 Custom = xg.SingleOrDefault(x => x.Language == otherLanguage).LanguageData,
               };