如何在ASP.Net MVC中使用“任务"重定向到操作 [英] How can I redirect to an action using Task in ASP.Net MVC

问题描述

我有一个如下的异步控制器实现，

I have an Asynchronous controller implementation as follows,

public Task<ActionResult> UpdateUser(ProfileModel model)
{
   return Task.Factory.StartNew(showMethod).ContinueWith(
         t =>
         {
              return RedirectToAction("ViewUser","UserProfile");
         });
}

但是，由于不断出现错误，我无法重定向到该操作，

However I am unable to redirect to the action as I am keep on getting the error,

无法隐式转换类型， System.Threading.Taska.Task<Sytem.Web.Mvc.RedirectToRouteResult> 为 System.Threading.Taska.Task<Sytem.Web.Mvc.ActionResult>

但是我真的想重定向到所提到的操作，我该怎么做.

However I really want to redirect to the mentioned Action, how can I do that.

推荐答案

您需要将UpdateUser操作的返回类型从Task<ActionResult>更改为Task<RedirectToRouteResult>

You need to change the return type of UpdateUser action from Task<ActionResult> to Task<RedirectToRouteResult>

public Task<RedirectToRouteResult> UpdateUser(ProfileModel model)
{
  return Task.Factory.StartNew(showMethod).ContinueWith(
    t => {
      return RedirectToAction("ViewUser","UserProfile");
  });
}

或者您可以使用ActionResult显式设置ContinueWith方法的泛型类型参数，如下所示:

Or you could explicitly set the generic type argument of ContinueWith method with ActionResult, like this:

public Task<ActionResult> UpdateUser(ProfileModel model)
{
  return Task.Factory.StartNew(showMethod).ContinueWith<ActionResult>(
    t => {
      return RedirectToAction("ViewUser","UserProfile");
  });
}

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