Asp.net MVC5为什么不会Html.ValidationSummary（假）显示异常错误？

我试图获取用户帐户管理在一个asp.net网站mvc5我建设工作。新用户创建主要工作，但是我在创建用户期间抛出异常时显示错误。该例外被捕获/处理，并且错误信息被添加到我的AdminController的Create（）动作的ModelState对象，但是当我返回到创建视图不显示错误。Asp.net MVC5为什么不会Html.ValidationSummary（假）显示异常错误？

其他类型的用户创建错误的，不导致异常被抛出，做正确显示。作为一个侧面说明，当问题发生时，我的浏览器上的“微调器”从不停止，表明发起创建操作的帖子从未完成。如果我点击浏览器中的一个菜单，我会导航到新页面，并且微调控制器消失。

var newUserCreateResult = UserManager.Create(newUser, password)

回报：

newUserCreateResult.Succeeded == false

的创建（）的错误，与关联

的时候出现的Create（）是正确显示和不与异常相关的错误例外，不正常显示时出现：

await UserManager.SendEmailAsync(newUser.Id, "Reset Password", "Please confirm your account and reset your password by clicking <a href=\"" + callbackUrl + "\">here</a>");

抛出异常。我使用的是SmtpMailService，当无法访问电子邮件服务器或者smtp帐户配置不正确时引发异常。

有些事情我已经试过：

@ Html.ValidationSummary（真）
手动创建通过的ModelState中错误在创建视图迭代的错误列表。调试器指示代码执行，但它仍然不显示。

我的Create（）行为：

 // PUT: /Admin/Create 
    [Authorize(Roles = "Admin")] 
    [HttpPost] 
    [ValidateAntiForgeryToken] 
    #region public ActionResult Create(CreateUserDTO createUserDTO) 
    public async Task<ActionResult> Create(CreateUserDTO createUserDTO) { 
     ApplicationUser newUser = null; 
     try { 
      if (createUserDTO == null) { 
       return new HttpStatusCodeResult(HttpStatusCode.BadRequest); 
      } 

      var Email = createUserDTO.Email.Trim(); 
      if (Email == "") { 
       throw new Exception("No Email"); 
      } 
      // Create user 
      newUser = new ApplicationUser { UserName = Email, Email = Email }; 
      var password = Membership.GeneratePassword(8, 3) + "aaZZ09"; 
      var newUserCreateResult = UserManager.Create(newUser, password); 

      if (newUserCreateResult.Succeeded == true) { 
       UserManager.AddToRole(newUser.Id, createUserDTO.SelectedRole); 
       string code = await UserManager.GeneratePasswordResetTokenAsync(newUser.Id); 
       code = HttpUtility.UrlEncode(code); 
       var callbackUrl = Url.Action("ConfirmEmail", "Account", new { userId = newUser.Id, code = code }, protocol: Request.Url.Scheme); 
       await UserManager.SendEmailAsync(newUser.Id, "Reset Password", "Please confirm your account and reset your password by clicking <a href=\"" + callbackUrl + "\">here</a>"); 

       return Redirect("~/Admin"); 
      } else { 
       // Html.ValidationSummary displays these errors correctly 
       foreach (string msg in newUserCreateResult.Errors) { 
        ModelState.AddModelError(string.Empty, msg); 
       } 
      } 
     } catch (Exception ex) { 
      // Html.ValidationSummary DOESN NOT display these errors 
      ModelState.AddModelError(string.Empty, ex.Message); 
     } 
     if (newUser != null) { 
      UserManager.Delete(newUser); 
     } 
     createUserDTO.Roles = GetAllRolesAsSelectList(); 
     return View("Create", createUserDTO); 
    }

我Create.cshtml观点：

@model Nissan.Models.CreateUserDTO 
@{ 
    Layout = "~/Views/Shared/_Layout.cshtml"; 
} 
@using (Html.BeginForm("Create", "Admin", FormMethod.Post, new { @class = "form-horizontal", role = "form" })) { 
    @Html.AntiForgeryToken() 
    <div class="form-horizontal"> 
     <h4>Create User</h4> 
     <hr /> 
     @Html.ValidationSummary(false, "", new { @class = "text-danger" }) 
     <div class="form-group"> 
      @Html.LabelFor(model => model.Email, 
      htmlAttributes: new { @class = "control-label col-md-2" }) 
      <div class="col-md-10"> 
       @Html.EditorFor(model => model.Email, 
       new { htmlAttributes = new { @class = "form-control" } }) 
       @Html.ValidationMessageFor(model => model.Email, "", 
       new { @class = "text-danger" }) 
      </div> 
     </div> 

     <div class="form-group"> 
      @Html.LabelFor(model => model.Roles, 
      htmlAttributes: new { @class = "control-label col-md-2" }) 
      <div class="col-md-10"> 
       @Html.DropDownListFor(model => model.SelectedRole, (Model == null) ? null : Model.Roles); 
      </div> 
     </div> 

     <div class="form-group"> 
      <div class="col-md-offset-2 col-md-10"> 
       <input type="submit" value="Create" class="btn btn-default" /> 
       @Html.ActionLink("Cancel", 
       "Index", 
       null, 
       new { @class = "btn btn-default" }) 
      </div> 
     </div> 
    </div> 
}

来源

2016-11-25 d ei

这个问题神秘失踪（后我重新启动我的电脑？）。现在它应该发布来自异常的错误。

来源

2016-11-28 21:42:53

Asp.net MVC5为什么不会Html.ValidationSummary（假）显示异常错误？

回答

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