IhttpActionResult的ASP.NET Core Web Api错误 [英] ASP.NET Core Web Api Error for IhttpActionResult

问题描述

我正在尝试首次创建一个新的Core Web API应用.我正在使用Core 2.2

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

我做了一些研究，但没有找到正确的答案.不知道我是否使用了错误的库.

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

不能将microsoft.aspnetcore.mvc.okresult类型隐式转换为system.web.http.Ihttpactionresult

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

这是我的代码

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);
    }
}

推荐答案

您需要使用 IActionResult ，而不是 IHttpActionResult .

Core中不存在 IHttpActionResult 接口，它在较旧的Web API项目中使用.

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

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