how to call method from controller - asp.net web api

Question

My task is to create services (using asp.net api) and use it for android aplication.

I have never done anything like this so I have a problems at begining. :(

First I created Class Library with few classes. Second I created asp.net web application and refered class library into it.

My problem is that I dont know how to access to methode from controller.

Here comes code:

Controller class:

  public class ValuesController : ApiController
{
    // GET api/<controller>
    public IEnumerable<string> Get()
    {
        return new string[] { "value1", "value2" };
    }

    // GET api/<controller>/5
    public string Get(int id)
    {
        return "value";
    }

    // POST api/<controller>
    public void Post([FromBody]string value)
    {
    }

    // PUT api/<controller>/5
    public void Put(int id, [FromBody]string value)
    {
    }

    // DELETE api/<controller>/5
    public void Delete(int id)
    {


    }
    public List<BuzzMonitor.Web.Message> Search()
    {
        MessageHandler mh = new MessageHandler();

        List<BuzzMonitor.Web.Message> messages = null;

        messages = mh.Search(string text, DateTime dateFrom, DateTime dateTo, List<int> themeIds, List<int> sourceIds);

        return messages;
    }


}

MessageHandler class:

 public class MessageHandler
{
    private List<Message> _dummyMessages = new List<Message>()
        {
            new Message(){
                MessageId = 1,
                CreatedDate = new DateTime(2014, 5, 27),
                Text = "Srpska vodoprivreda...",
                Autor = "Marko Markovic",
                Source = "Twitter"

            },
            new Message(){
                MessageId = 2,
                CreatedDate = new DateTime(2014, 5, 27),
                Text = "Aerodrom Beograd...",
                Autor = "Zoran Zoric",
                Source = "B92"

            }
        };

    public List<Message> GetLatestMessages(int nrMessagesToReturn)
    {
        List<Message> retVal;

        retVal = this._dummyMessages.GetRange(0, nrMessagesToReturn);

        return retVal;
    }

    public List<Message> Search(string text, DateTime dateFrom, DateTime dateTo, List<int> themeIds, List<int> sourceIds, int pageIndex, int pageSize)
    {
        List<Message> retVal;

        retVal = this.Search(text, dateFrom, dateTo, themeIds, sourceIds);

        if (retVal != null && retVal.Count > 0)
        {
            retVal = retVal.GetRange(pageIndex * pageSize, pageSize);
        }

        return retVal;
    }

    public List<Message> Search(string text, DateTime dateFrom, DateTime dateTo, List<int> themeIds, List<int> sourceIds)
    {
        List<Message> retVal = null;

        retVal = this._dummyMessages.Where(m => m.Text.IndexOf(text, StringComparison.OrdinalIgnoreCase) > -1 &&
            m.CreatedDate >= dateFrom &&
            m.CreatedDate < dateTo &&
            (themeIds == null || themeIds.Count == 0 || (themeIds.Contains(m.ThemeId))) &&
            (sourceIds == null || sourceIds.Count == 0 || (sourceIds.Contains(m.SourceId)))).ToList<Message>();

        return retVal;
    }


}

Message class:

    public class Message
{
    public int MessageId { get; set; }

    public DateTime CreatedDate { get; set; }

    public string Text { get; set; }

    public string Autor { get; set; }

    public string Source { get; set; }

    public int ThemeId { get; set; }

    public int SourceId { get; set; }
}

Ok, one more, I want to access MessageHandler class and it's methode Search from controller, but I dont know how, because when I type MessageHandler and put dot I cant type anything more :(

Thank you all for your help!

I don't understand your question, you should just create an instance of MessageHandler and then call the methods on the instance — 3dd
– 3dd, Commented May 28, 2014 at 11:54
@3dd ok I did it. I edited controller class you can see it, but still all parametars of the method are underlined with red as misteke :( do you know why? — MalaAiko
– MalaAiko, Commented May 28, 2014 at 12:08
Which parameters are underlined and what's the error message you get? — 3dd
– 3dd, Commented May 28, 2014 at 12:13
mh.Search(string text, DateTime dateFrom, DateTime dateTo, List<int> themeIds, List<int> sourceIds); - that's not how you call a method. You need to pass values instead of parameter declarations. You need to follow some basic C# tutorials. — Ant P
– Ant P, Commented May 28, 2014 at 12:13
I'm noticing that you're posting a lot of questions on StackOverflow about this one snippet of code - why don't you try getting a beginner C# book or searching for some tutorials online? That way you will actually understand what you're doing. — Ant P
– Ant P, Commented May 28, 2014 at 12:17

Mister Epic · Accepted Answer · 2014-05-28 12:15:14Z

1

Your issue is you are indicating your argument types as you are calling your method. You only indicate the type when you define your method:

messages = mh.Search(string text, DateTime dateFrom, DateTime dateTo, List<int> themeIds, List<int> sourceIds);

should be:

messages = mh.Search(text, dateFrom, dateTo, themeIds, sourceIds);

However, you still have anpother issue in that those variables don't exist. Where are they coming from? I presume you want to pass them into the Web API action method.

answered May 28, 2014 at 12:15

Mister Epic

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