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) +119
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary 2 parameters) +119
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary 2 parameters) +119
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary 2参数）+27
System.Web.Mvc。<> c__DisplayClass15.b__12（）+55 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter（IActionFilter filter，ActionExecutingContext preContext，Func 1 continuation) +253
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +22 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList 1 continuation) +253
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +22 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList 1 continuation) +253
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +22 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList 1过滤器，ActionDescriptor actionDescriptor，IDictionary 2 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 2 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 2 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 2.CallEndDelegate（IAsyncResult asyncResult）+16
System.Web.Mvc.Async.WrappedAsyncResultBase 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 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 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 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（IExecutionStep step，Boolean＆completedSynchronously）+155

Answer 1

我对Controller的“DisableAsyncSupport”方法进行了覆盖，并将getter设置为false，一切正常！

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

我相信通过继承自控制器（我有自己的控制器，“ControllerBase”），该方法必须表现不同。