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ASP.NET Core Web Api Error for IhttpActionResult

0

I am trying to create a new Core Web API app for the first time. I am using Core 2.2

I did some research but did not find the correct answer. Not sure if I am using wrong libraries.

cannot implicitly convert type microsoft.aspnetcore.mvc.okresult to system.web.http.Ihttpactionresult

Here is my Code

using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.AspNetCore.Mvc;

[Microsoft.AspNetCore.Mvc.Route("api/User")]
[ApiController]
public class UserController : ControllerBase

 [Microsoft.AspNetCore.Mvc.HttpGet]
 public async Task<IHttpActionResult> GetAllUsers()
 
 var users = await this.GetUserAsync();
 return this.Ok(users);
 

asp.net-core asp.net-core-webapi

share|improve this question

asked Mar 6 at 17:41

ChatraChatra

42611140

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In addition to the answers below, remove the System.Web dependency. That's going to cause all sorts of issues. ASP.NET Core does not use System.Web so if you see something coming from that namespace, you're doing it wrong.
  
  – Chris Pratt
  Mar 6 at 18:27
  

  
  
  
  

add a comment | 

0

I am trying to create a new Core Web API app for the first time. I am using Core 2.2

I did some research but did not find the correct answer. Not sure if I am using wrong libraries.

cannot implicitly convert type microsoft.aspnetcore.mvc.okresult to system.web.http.Ihttpactionresult

Here is my Code

using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.AspNetCore.Mvc;

[Microsoft.AspNetCore.Mvc.Route("api/User")]
[ApiController]
public class UserController : ControllerBase

 [Microsoft.AspNetCore.Mvc.HttpGet]
 public async Task<IHttpActionResult> GetAllUsers()
 
 var users = await this.GetUserAsync();
 return this.Ok(users);
 

asp.net-core asp.net-core-webapi

share|improve this question

asked Mar 6 at 17:41

ChatraChatra

42611140

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  In addition to the answers below, remove the System.Web dependency. That's going to cause all sorts of issues. ASP.NET Core does not use System.Web so if you see something coming from that namespace, you're doing it wrong.
  
  – Chris Pratt
  Mar 6 at 18:27
  

  
  
  
  

add a comment | 

I am trying to create a new Core Web API app for the first time. I am using Core 2.2

I did some research but did not find the correct answer. Not sure if I am using wrong libraries.

cannot implicitly convert type microsoft.aspnetcore.mvc.okresult to system.web.http.Ihttpactionresult

Here is my Code

using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.AspNetCore.Mvc;

[Microsoft.AspNetCore.Mvc.Route("api/User")]
[ApiController]
public class UserController : ControllerBase

 [Microsoft.AspNetCore.Mvc.HttpGet]
 public async Task<IHttpActionResult> GetAllUsers()
 
 var users = await this.GetUserAsync();
 return this.Ok(users);
 

asp.net-core asp.net-core-webapi

share|improve this question

asked Mar 6 at 17:41

ChatraChatra

42611140

using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.AspNetCore.Mvc;

[Microsoft.AspNetCore.Mvc.Route("api/User")]
[ApiController]
public class UserController : ControllerBase

 [Microsoft.AspNetCore.Mvc.HttpGet]
 public async Task<IHttpActionResult> GetAllUsers()
 
 var users = await this.GetUserAsync();
 return this.Ok(users);
 

share|improve this question

asked Mar 6 at 17:41

ChatraChatra

42611140

share|improve this question

asked Mar 6 at 17:41

ChatraChatra

42611140

asked Mar 6 at 17:41

ChatraChatra

42611140

asked Mar 6 at 17:41

ChatraChatra

42611140

2 Answers
2

active

oldest

votes

2

You need to use IActionResult, not IHttpActionResult.

The IHttpActionResult interface does not exist in Core, it's used in older Web API projects.

share|improve this answer

edited Mar 6 at 21:40

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

add a comment | 

2

[HttpGet]
public async Task<IActionResult> GetAllUsers()

 var users = await this.GetUserAsync()
 return Ok(users);

Try changing the type to IActionResult.
According to Microsoft docs: the following components don't exist in ASP.NET Core:

IHttpActionResult interface

And I don't believe you need this.Ok, it should be fine using just Ok.

share|improve this answer

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

add a comment | 

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2

You need to use IActionResult, not IHttpActionResult.

The IHttpActionResult interface does not exist in Core, it's used in older Web API projects.

share|improve this answer

edited Mar 6 at 21:40

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

add a comment | 

2

You need to use IActionResult, not IHttpActionResult.

The IHttpActionResult interface does not exist in Core, it's used in older Web API projects.

share|improve this answer

edited Mar 6 at 21:40

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

add a comment | 

You need to use IActionResult, not IHttpActionResult.

The IHttpActionResult interface does not exist in Core, it's used in older Web API projects.

share|improve this answer

edited Mar 6 at 21:40

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

share|improve this answer

edited Mar 6 at 21:40

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

answered Mar 6 at 17:46

juunasjuunas

23.1k35082

2

[HttpGet]
public async Task<IActionResult> GetAllUsers()

 var users = await this.GetUserAsync()
 return Ok(users);

Try changing the type to IActionResult.
According to Microsoft docs: the following components don't exist in ASP.NET Core:

IHttpActionResult interface

And I don't believe you need this.Ok, it should be fine using just Ok.

share|improve this answer

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

add a comment | 

2

[HttpGet]
public async Task<IActionResult> GetAllUsers()

 var users = await this.GetUserAsync()
 return Ok(users);

Try changing the type to IActionResult.
According to Microsoft docs: the following components don't exist in ASP.NET Core:

IHttpActionResult interface

And I don't believe you need this.Ok, it should be fine using just Ok.

share|improve this answer

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

add a comment | 

[HttpGet]
public async Task<IActionResult> GetAllUsers()

 var users = await this.GetUserAsync()
 return Ok(users);

Try changing the type to IActionResult.
According to Microsoft docs: the following components don't exist in ASP.NET Core:

IHttpActionResult interface

And I don't believe you need this.Ok, it should be fine using just Ok.

share|improve this answer

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

[HttpGet]
public async Task<IActionResult> GetAllUsers()

 var users = await this.GetUserAsync()
 return Ok(users);

share|improve this answer

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113

answered Mar 6 at 17:54

porkchop.12porkchop.12

3113