Grouping a complex collection using groupby

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I am dealing with the following result set in my query. The query result is a collection of Animals. Each Animal can be allocated to more than one team.
Query Result
ID TYPE TEAMCODE
2 MAMMAL RTB1
2 MAMMAL RTB2

I can produce the following output but it only includes the first AnimalTeamCode RTB1

XML

<Animal id="2">
 <AnimalTeam>
   <AnimalTeamCode>RTB1</AnimalTeamCode>
 <AnimalTeam>
<animal>

What i am trying to achieve is that for each Animal, if its been allocated to more than one team i want to show it like this:

XML

<Animal id="2">
 <AnimalTeam>
   <AnimalTeamCode>RTB1</AnimalTeamCode>
   <AnimalTeamCode>RTB2</AnimalTeamCode>
 <AnimalTeam>
<animal>

What I have tried:

currently this how i am using the GroupBy operator

C#

//code to get the listOfAnimals
 ......
 //Group the list of Animals
var groupedCollection = listOfAnimals.GroupBy(animal => animal.ID).ToDictionary(animal => animal.key, animal => animal.Value.ToList())

How can i group the results so i can achieve the above?

Posted 28-Nov-16 7:49am

Eagle32

Updated 28-Nov-16 11:11am

v6

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Comments

#realJSOP 28-Nov-16 13:55pm

How are you able to generate that output. It's malformed XML. Further, your variable names quite frankly suck since we don't know what "a" is a type of, nor the properties within it, nor why you're using a dictionary.

Eagle32 28-Nov-16 14:21pm

My XML is not being correctly parsed when i pasted it into the post. How can i fix this?

#realJSOP 28-Nov-16 14:24pm

When you paste it, paste it as a code block, and it should determine the correct language automatically. If it doesn't, make sure the "lang" element is set to "XML".

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Ehsan Sajjad · Accepted Answer · 2016-11-28T08:37:00

You are not doing it correctly, you need to set the Key and Value property while using ToDictionary, just change the ToDictionary call to be like:

C#

var groupedCollection = listOfAnimals.GroupBy(animal => animal.ID)
                                     .ToDictionary( group => group.Key, 
                                                    group => group.ToList()
                                                   );