How to return a list of objects as an IHttpActionResult?

Question

I\'m new to ASP.NET webapi and I can\'t find a way to return a list of objects queried by id.

This is my controller method for the GET request. I want to return all the

Answer 1

First of all do not use the entity directly for providing data. Create a DTO for your entities:

public class QuestionDto
{

  public int id {get; set;}
  //put here getter and setter for all other Question attributes you want to have

  public QuestionDto(Question question){
    this.id = question.id;
    ... and so on
  }
}

Then your GET method could look like this:

// GET: api/Questions/5
public List GetQuestion(int questionnaireId)
{
    IEnumerable questions = from q in db.Questions
    where q.QuestionnaireId == questionnaireId
    select new QuestionDto(q);
    return questions.toList();
}

I also recommend to use JSON for data transfer since it is quite ease to use with Javascript.