Question

我正在尝试让用户帐户管理工作在我正在构建的asp.net mvc5网站上。新用户创建大部分都在工作，但是在创建用户期间抛出异常时，我遇到显示错误的问题。捕获/处理异常并在AdminController的Create（）操作中向ModelState对象添加错误消息，但是当我返回到Create视图时，不会显示错误。

其他类型的用户创建错误（不会导致抛出异常）会正确显示。作为旁注，当问题发生时，我的浏览器上的“微调器”永远不会停止，表明启动创建操作的帖子从未完成。如果我点击浏览器中的菜单，我会导航到新页面并且微调器消失。

在以下情况下正确显示且与例外无关的Create（）错误发生在：

var newUserCreateResult = UserManager.Create(newUser, password)

返回：

newUserCreateResult.Succeeded == false

与异常关联且不正确显示的create（）错误发生在：

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。我正在使用SmtpMailService，当无法访问电子邮件服务器或smtp帐户配置不正确时抛出异常。

我尝试过的一些事情：

@ Html.ValidationSummary（真）
通过迭代ModelState手动创建错误列表 “创建”视图中的错误。调试器指示代码执行，但它仍然无法显示。

我的Create（）动作：

        // 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);
    }

我的Create.cshtml视图：

    @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>
}

Answer 1

这个问题神秘地消失了（我重新启动电脑后？）。它现在应该从异常中发布错误。

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

1 个答案: