带有异步操作的ASP.NET MVC

Question

我需要从异步操作发送异步电子邮件.我不明白为什么会发生以下错误,因为我在其他项目中使用同一个类并且只使用相同的表单而没有错误,一切都很安静.

错误:

异步操作方法'EsqueciMinhaSenhaAsync'返回一个无法同步执行的Task.

行动:

        [AllowAnonymous]
        [HttpPost, ValidateAntiForgeryToken]
        public async Task<ActionResult> EsqueciMinhaSenhaAsync(UsuarioEsqueciMinhaSenhaViewModel vModel)
        {
            if (ModelState.IsValid)
            {
                var conteudo = "este é o conteudo do email";
                var nomeRemetente = "esse é o nome do remetente";

                if(await EmailService.SendAsync(Language.PasswordRecovery, conteudo, vModel.EmailOuUsername, nomeRemetente))
                {
                    TempData["MensagemRetorno"] = Language.EmailSendedWithSuccess;
                    return View("login");
                }
            }

            TempData["MensagemRetorno"] = Language.ErrorSendingEmail;
            return View("EsqueciMinhaSenha");
        }

我的电邮服务:

    public static async Task<bool> SendAsync(string assunto, string conteudo, string destinatario, string nomeDestinatario)
    {
        // Habilitar o envio de e-mail
        var appSetting = ConfigurationManager.AppSettings;

        if (appSetting != null && appSetting.Count >= 7 && !string.IsNullOrEmpty(assunto) && !string.IsNullOrEmpty(conteudo) && !string.IsNullOrEmpty(destinatario) && !string.IsNullOrEmpty(nomeDestinatario))
        {
            int port = 0;
            bool useSSl = false;

            using (var msg = new MailMessage
            {
                From = new MailAddress(appSetting["EmailFrom"], appSetting["EmailNameFrom"]),
                Body = WebUtility.HtmlEncode(conteudo)
            })
            {
                int.TryParse(appSetting["EmailPort"], out port);
                bool.TryParse(appSetting["EmailUseSSL"], out useSSl);


                msg.ReplyToList.Add(destinatario);
                msg.To.Add(new MailAddress(destinatario, nomeDestinatario));
                msg.Subject = assunto;
                msg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(msg.Body, null, MediaTypeNames.Text.Plain));
                msg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(msg.Body, null, MediaTypeNames.Text.Html));

                using (var smtpClient = new SmtpClient(appSetting["EmailServer"], port))
                {
                    var credentials = new NetworkCredential(appSetting["EmailUserName"], appSetting["EmailPassword"]);
                    smtpClient.Credentials = credentials;
                    smtpClient.EnableSsl = useSSl;
                    await smtpClient.SendMailAsync(msg);

                    return await Task.FromResult(true);
                }
            }
        }

        return await Task.FromResult(false);
    }

堆栈跟踪:

[InvalidOperationException:异步操作方法'esqueciminhasenha'返回一个无法同步执行的Task.]
System.Web.Mvc.Async.TaskAsyncActionDescriptor.Execute(ControllerContext controllerContext,IDictionary 2 parameters)+27 System.Web.Mvc.<> c__DisplayClass15.b__12()+55 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter过滤器,ActionExecutingContext preContext,Func 1过滤器,ActionDescriptor actionDescriptor,IDictionary 2.CallEndDelegate(IAsyncResult asyncResult)+16 System.Web.Mvc.Async.WrappedAsyncResultBase 1 .CallEndDelegate(IAsyncResult asyncResult)+29 System.Web.Mvc.Async.WrappedAsyncResultBase`1.End()+ 49 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult)+28 System.Web.Mvc.MvcHandler.System. Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)+9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()+ 9765121 System.Web.HttpApplication.ExecuteStep(IExecuti onStep step,Boolean&completedSynchronously)+1552 parameters) +119
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary
1 continuation) +253
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +22 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList2 parameters) +189
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +521
System.Web.Mvc.Controller.ExecuteCore() +95
MusiArtist.MVC.Areas.admin.Controllers.BaseController.ExecuteCore() in F:\Backup\BitBucket\negrini.musiartist\src\MusiArtist.MVC\Areas\admin\Controllers\BaseController.cs:29 System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +180 System.Web.Mvc.<>c__DisplayClass19.<BeginExecute>b__13() +18 System.Web.Mvc.Async.AsyncResultWrapper.<.cctor>b__0(IAsyncResult asyncResult, Action action) +15
System.Web.Mvc.Async.WrappedAsyncResult
1.End() +49
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
System.Web.Mvc.Async.WrappedAsyncVoid

Answer 1

我对控制器的“DisableAsyncSupport”方法进行了覆盖，并将 getter 设置为 false，一切都完美运行！

protected override bool DisableAsyncSupport
{
    get { return false; }
}

我相信，通过从控制器继承（我有自己的控制器“ControllerBase”），该方法的行为必须有所不同。