例外：ASP.NET MVC控制器中的“值不在预期范围内”[重复]

Question

这个问题在这里已有答案：

• 自定义任务运行器方法抛出ArgumentException 1的答案

我有这个字符串格式化，并在此部分抛出异常（字符串体....）

    private Task SendEmailConfirmation(UserModel user)
    {
        var emailService = new EmailUnsecServiceAgent(null);
    string body = string.Format("Dear {0} <BR/>Thank you for your registration, " +
                                "please click on the below link to complete your" +
                                " registration: <a href=\"{1}\" title=\"User Email Confirm\">{1}</a>",
                                user.UserName,
                                Url.Action("ConfirmEmail",
                                "Account",
                                new
                                      {
                                          confirmationToken = user.ConfirmationToken,
                                          email = user.Email
                                      },,
                                Request.Url.Scheme));

   return Task.Run(() => emailService.SendEmail("Confirm your account", body, null, true, null, null, null));
}

confirmationToken和email是字符串，我的ConfirmEmail是

[AllowAnonymous]
public async Task<ActionResult> ConfirmEmail(string confirmationToken, string email)
{
    var securityService = new SecurityUnsecServiceAgent(null);
    UserModel user = securityService.GetUserByConfirmationToken(confirmationToken);

    if (user != null)
    {
        if (user.Email == email)
        {
            user.ConfirmedEmail = true;
            securityService.UpdateUser(user);

            return View("RegisterMessage");
        }

        return View("ConfirmEmail", user);
    }

    return RedirectToAction("ConfirmEmail", user);
}

这是StackTrace：

   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode)
   at System.Web.Hosting.IIS7WorkerRequest.GetServerVariableInternal(String name)
   at System.Web.Hosting.IIS7WorkerRequest.GetServerVariable(String name)
   at System.Web.WebPages.UrlRewriterHelper.WasThisRequestRewritten(HttpContextBase httpContext)
   at System.Web.WebPages.UrlRewriterHelper.WasRequestRewritten(HttpContextBase httpContext)
   at System.Web.WebPages.UrlUtil.GenerateClientUrlInternal(HttpContextBase httpContext, String contentPath)
   at System.Web.WebPages.UrlUtil.GenerateClientUrl(HttpContextBase httpContext, String contentPath)
   at System.Web.Mvc.UrlHelper.GenerateUrl(String routeName, String actionName, String controllerName, RouteValueDictionary routeValues, RouteCollection routeCollection, RequestContext requestContext, Boolean includeImplicitMvcValues)
   at System.Web.Mvc.UrlHelper.GenerateUrl(String routeName, String actionName, String controllerName, RouteValueDictionary routeValues)
   at System.Web.Mvc.UrlHelper.Action(String actionName, String controllerName, Object routeValues)
   at SendEmailConfirmation(UserModel user) in c:\Projects\..\Controllers\AccountController.cs:line 361
   at Controllers.AccountController.<>c__DisplayClass21.<Register>b__1d() in c:\Projects\..\Controllers\AccountController.cs:line 318
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()

Answer 1

URL助手可能在请求被销毁后尝试创建URL（因为它是异步的）。 在这种情况下，尝试Url.Action（）时会出错。

尝试在非异步控制器中生成电子邮件正文，并将其作为参数发送到您的电子邮件类中。

Custom task runner方法抛出ArgumentException的问题似乎与你所看到的密切相关（直到堆栈跟踪和OP到达答案的方法）。