ASP.NET MVC Html.ValidationSummary (true)는 모델 오류를 표시하지 않습니다

ASP.NET MVC Html.ValidationSummary (true)는 모델 오류를 표시하지 않습니다

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Html.ValidationSummary에 문제가 있습니다. ValidationSummary에 속성 오류를 표시하고 싶지 않습니다. 그리고 Html.ValidationSummary (true)를 설정하면 ModelState의 오류 메시지가 표시되지 않습니다. 문자열에 대한 컨트롤러 동작에 예외가있는 경우

MembersManager.RegisterMember(member);

catch 섹션은 ModelState에 오류를 추가합니다.

ModelState.AddModelError("error", ex.Message);

그러나 ValidationSummary는이 오류 메시지를 표시하지 않습니다. Html.ValidationSummary (false)를 설정하면 모든 메시지가 표시되지만 속성 오류를 표시하고 싶지 않습니다. 이 문제를 어떻게 해결할 수 있습니까?

사용중인 코드는 다음과 같습니다.

모델:

public class Member
{
        [Required(ErrorMessage = "*")]
        [DisplayName("Login:")]
        public string Login { get; set; }

        [Required(ErrorMessage = "*")]
        [DataType(DataType.Password)]
        [DisplayName("Password:")]
        public string Password { get; set; }

        [Required(ErrorMessage = "*")]
        [DataType(DataType.Password)]
        [DisplayName("Confirm Password:")]
        public string ConfirmPassword { get; set; }
}

제어 장치:

[HttpPost]
public ActionResult Register(Member member)
{
    try
    {
        if (!ModelState.IsValid)
            return View();

        MembersManager.RegisterMember(member);
    }
    catch (Exception ex)
    {
        ModelState.AddModelError("error", ex.Message);

        return View(member);
    }
}

전망:

<% using (Html.BeginForm("Register", "Members", FormMethod.Post, 
                        new { enctype = "multipart/form-data" })) {%> 
    <p>
        <%= Html.LabelFor(model => model.Login)%>
        <%= Html.TextBoxFor(model => model.Login)%>
        <%= Html.ValidationMessageFor(model => model.Login)%>
    </p>

    <p>
        <%= Html.LabelFor(model => model.Password)%>
        <%= Html.PasswordFor(model => model.Password)%>
        <%= Html.ValidationMessageFor(model => model.Password)%>
    </p>

    <p>
        <%= Html.LabelFor(model => model.ConfirmPassword)%>
        <%= Html.PasswordFor(model => model.ConfirmPassword)%>
        <%= Html.ValidationMessageFor(model => model.ConfirmPassword)%>
    </p>

    <div>
        <input type="submit" value="Create" />
    </div>

    <%= Html.ValidationSummary(true)%>
<% } %>

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I believe the way the ValidationSummary flag works is it will only display ModelErrors for string.empty as the key. Otherwise it is assumed it is a property error. The custom error you're adding has the key 'error' so it will not display in when you call ValidationSummary(true). You need to add your custom error message with an empty key like this:

ModelState.AddModelError(string.Empty, ex.Message);

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This works better, as you can show validationMessage for a specified key:

    ModelState.AddModelError("keyName","Message");

and display it like this:

    @Html.ValidationMessage("keyName")

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I know this is kind of old and has been marked as answers with 147 up votes, but there is something else to consider.

You can have all the model errors, the property named and string.Empty keys alike, be shown in the ValidationSummary if you need to. There is an overload in the ValidationSummary that will do this.

    //   excludePropertyErrors:
    //   true to have the summary display model-level errors only, or false to have
    //   the summary display all errors.
    public static MvcHtmlString ValidationSummary(this HtmlHelper htmlHelper, bool excludePropertyErrors);

---

Maybe like that:

[HttpPost]
public ActionResult Register(Member member)
{
    try
    {
       if (!ModelState.IsValid)
       {
          ModelState.AddModelError("keyName", "Form is not valid");
          return View();
       }
       MembersManager.RegisterMember(member);
    }
    catch (Exception ex)
    {
       ModelState.AddModelError("keyName", ex.Message);
       return View(member);
    }
}

And in display add:

<div class="alert alert-danger">
  @Html.ValidationMessage("keyName")
</div>

OR

<div class="alert alert-danger">
  @Html.ValidationSummary(false)
</div>

---

@Html.ValidationSummary(false,"", new { @class = "text-danger" })

Using this line may be helpful

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In my case it was not working because of the return.

Instead of using:

return RedirectToAction("Rescue", "CarteiraEtapaInvestimento", new { id = investimento.Id, idCarteiraEtapaResgate = etapaDoResgate.Id });

I used:

return View("ViewRescueCarteiraEtapaInvestimento", new CarteiraEtapaInvestimentoRescueViewModel { Investimento = investimento, ValorResgate = investimentoViewModel.ValorResgate });

It´s a Model, so it is obvius that ModelState.AddModelError("keyName","Message"); must work with a model.

This answer show why. Adding validation with DataAnnotations

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If nearly everything seems right, another thing to look out for is to ensure that the validation summary is not being explicitly hidden via some CSS override like this:

.validation-summary-valid {
    display: none;
}

This may also cause the @Html.ValidationSummary to appear hidden, as the summary is dynamically rendered with the validation-summary-valid class.

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You can try,

<div asp-validation-summary="All" class="text-danger"></div>

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ADD it in the lowermost part og your View:

@section Scripts { @Scripts.Render("~/bundles/jqueryval") }

참고URL : https://stackoverflow.com/questions/2818219/asp-net-mvc-html-validationsummarytrue-does-not-display-model-errors