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Web API HttpGetAttribute errors

I'm making an API for accessing a SQL Server database. I've written the models and classes that I need, so now need to create a controller for joining everything up.

My controller code at the moment is

using Microsoft.AspNetCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using EPOSDatabase_API.DataProvider;
using EPOSDatabase_API.Models;
using System.Web.Http;

namespace EPOSDatabase_API.Controllers


[Route("api/[controller]")]
public class CategoryController : ApiController

private ICategoryDataProvider categoryDataProvider;

public CategoryController(ICategoryDataProvider categoryDataProvider)

this.categoryDataProvider = categoryDataProvider;


[HttpGet]
public async Task<IEnumerable<Category>> Get()

return await this.categoryDataProvider.GetCategories();


[HttpGet("id")]
public async Task<Category> Get(int Category_ID)

return await this.categoryDataProvider.GetCategory(Category_ID);


[HttpPost]
public async Task Post([FromBody]Category category)

await this.categoryDataProvider.AddCategory(category);


[HttpPut("id")]
public async Task Put(int Category_ID, [FromBody]Category category)

await this.categoryDataProvider.UpdateCategory(category);


[HttpDelete("id")]
public async Task Delete(int Category_ID)

await this.categoryDataProvider.DeleteCategory(Category_ID);





However for the lines

[HttpGet("id")], [HttpPut("id")] and [HttpDelete("id")] I get an error

[HttpGet("id")]

[HttpPut("id")]

[HttpDelete("id")]

'HttpGet/Put/DeleteAttribute' does not contain a constructor that takes 1 argument

Why is this error occurring, am I missing a using reference, perhaps?

using

Microsoft.AspNetCore.Mvc

System.Web.Mvc

using Microsoft.AspNetCore;

using System.Web.Http;

1 Answer
1

[HttpGet]
public async Task<Category> Get(int id)

return await this.categoryDataProvider.GetCategory(Category_ID);



or

[Route("id")]
public async Task<Category> Get(int id)

return await this.categoryDataProvider.GetCategory(Category_ID);



should both do the trick.
ASP.NET Web API know how to match your method signature to the incoming request.
or if you want to change the default behavior you must keep the variable name as the parameter name in the method signature.

you can read more about Attribute Routing in ASP.NET Web API 2 in here

id

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