我如何使用 AspNetCore 抛出 HttpResponseException(NotFound)

Question

我写的方法.Net 4.5 很简单。它要么returns Student entity or throw NOT FOUND exception.

我正在努力port it into .NET Core 2.0. 根据我的理解，.net core建议返回IActionResult，我可以简单地返回NotFound().

但是，我不确定如何抛出 not HttpResponseException (Not Found) 异常。

方法：

public Student Get(Guid id)
{
    Student student = _studentSvc.Get(id);
    if (student != null)
        return student;
    else
        throw new HttpResponseException(HttpStatusCode.NotFound);
}

试图：

public Student Get(Guid id)
{
    Student student = _svc.Get(id);
    if (student != null)
        return student;
    else
        return NotFound();
}

如果我尝试跟随，那么这条线会return student抱怨不能隐式地将学生转换为...Mvc.IActionResult某些东西

public IActionResult Get(Guid id)
{
    Student student = _svc.Get(id);
    if (student != null)
        return student;
    else
        return NotFound();
}

但它给出了错误无法将 NotFoundResult 转换为 Student ！！

Answer 1

正如您所提到的，您需要返回 IActionResult 。

public IActionResult Get(Guid id)
{
    Student student = _svc.Get(id);
    if (student != null)
    {
        return Ok(student);
    }
    return NotFound();
}