CODEWITHSUNDEEP
c#entity-frameworkweb-services
user2897967
user2897967

Reputation: 337

How to override the Get method in Web API in C#.net

I have created web api using Entity Frame work in C#.net. I have a controller class in which i have defined some methods like this.

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Web.Http;
 using Test_Net_Test_Info.Models;

 namespace Test_Net_Test_Info.Controllers
 {
 public class InfosController : ApiController
 {
    public List<Info> Get()
    {
        return InfoRepository.GetAllInfos();
    }
    public Info Get(int id)
    {
        return InfoyRepository.GetInfoById(id);
    }
    public Info Get(string company)
    {
        return InfoRepository.GetInfoByCompany(company);
    }
    public Info Get(string contact)
    {
        return InfoRepository.GetInfoByContact(contact);
    }

my InfoRepository class looks like this

   using System;
   using System.Collections.Generic;
   using System.Linq;
   using System.Web;

   namespace Test_Net_Test_Info.Models
   {
      public class InfoRepository
      {
       public static List<Info> GetAllInfoss()
      {
        Test_NETEntities dataContext = new Test_NETEntities();
        var query = from info in dataContext.Infoss select info;
        return query.ToList();
      }
      public static Info GetInfoById(int id)
      {
        test_NETEntities dataContext = new test_NETEntities();
        v*emphasized text*ar query = (from info in dataContext.Infos where info.ID ==id   select info).SingleOrDefault();
        return query;
      }
    public static Info GetInfoByContact(string contact)
    {
        Test_NETEntities dataContext = new Test_NETEntities();
    //    var query = (from info in dataContext.Infos where info.Contact == contact  select info).SingleOrDefault();
    //    return query;
    //}
    public static Info GetInfoByCompany(string company)
    {
        Test_NETEntities dataContext = new test_NETEntities();
        var query = (from info in dataContext.Infos where info.Company == company select info).SingleOrDefault();
        return query;
    }

I am getting an error Test_Net_Test_Info.Controllers. already defines a member called 'Get' with the same parameter types. I am trying to retrieve data by Company name and Contact name. Kindly help me.

Upvotes: 0

Views: 2213

Answers (2)

David
David

Reputation: 218847

This is one area where HTTP verbs and C# method signatures don't always get along. One approach could be to combine them into a single method:

public Info Get(string company = null, string contact = null)
{
    if (company != null)
        return InfoRepository.GetInfoByCompany(company);
    if (contact != null)
        return InfoRepository.GetInfoByContact(contact);
    // throw an exception?  some other default action?
}

Then you'd just be relying on the model binder to populate the method arguments based on the request.

(You might also use checks on string.IsNullOrWhiteSpace() instead of null.)

Upvotes: 1

Patrick Hofman
Patrick Hofman

Reputation: 156978

Your method signatures are ambiguous. Changing the name will fix the issue:

public Info GetByCompany(string company)
{
    return InfoRepository.GetInfoByCompany(company);
}

public Info GetByContact(string contact)
{
    return InfoRepository.GetInfoByContact(contact);
}

In both your method calls, the only thing the compiler sees is this (the signature):

Info GetByContact(string)

It doesn't know how to choose between the company and contact parameter.

Upvotes: 3

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