C# 向te视图显示ModelState错误

我试图向用户显示一些错误

为此，我正在使用

ModelState.isValid

和

@Html.ValidationSummary

来显示它

但不知何故，它目前不起作用

型号：

[Required(ErrorMessage = "Account name is required")]
[EmailAddress]
public string CTC_accountName { get; set; }

[Required(ErrorMessage = "Password is required")]
[DataType(DataType.Password)]
public string CTC_accountPassword { get; set; }

[HttpPost]
public async Task<IActionResult> Submit(RegisterViewModel model)
{
        if (!ModelState.IsValid)
        {
          return View(model);
        }
    }
}

@using (Html.BeginForm("Submit", "Register", FormMethod.Post, new { id = "formAll", style = "margin-top:3%", enctype = "multipart/form-data" }))
{

    <div class="shadow-sm p-2 mb-3 rounded">
        <div class="col-sm-9">
            <h5>Personal Details</h5>
        </div>
    </div>
    <div id="formMember">
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountName, "Account/Email*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountName, new { htmlAttributes = new { @class = "form-control", @placeholder = "Email", @id = "CTC_accountName", @autocomplete = "username" } })
            </div>
            <div class="col-sm-10">
                 @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountPassword, "Password*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountPassword, new { htmlAttributes = new { @class = "form-control", @placeholder = "Password", @id = "CTC_accountPassword", @type = "password", @autocomplete = "current-password" } })
            </div>
            <div class="col-sm-10">
                @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
    </div>
}

控制器：

[Required(ErrorMessage = "Account name is required")]
[EmailAddress]
public string CTC_accountName { get; set; }

[Required(ErrorMessage = "Password is required")]
[DataType(DataType.Password)]
public string CTC_accountPassword { get; set; }

[HttpPost]
public async Task<IActionResult> Submit(RegisterViewModel model)
{
        if (!ModelState.IsValid)
        {
          return View(model);
        }
    }
}

@using (Html.BeginForm("Submit", "Register", FormMethod.Post, new { id = "formAll", style = "margin-top:3%", enctype = "multipart/form-data" }))
{

    <div class="shadow-sm p-2 mb-3 rounded">
        <div class="col-sm-9">
            <h5>Personal Details</h5>
        </div>
    </div>
    <div id="formMember">
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountName, "Account/Email*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountName, new { htmlAttributes = new { @class = "form-control", @placeholder = "Email", @id = "CTC_accountName", @autocomplete = "username" } })
            </div>
            <div class="col-sm-10">
                 @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountPassword, "Password*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountPassword, new { htmlAttributes = new { @class = "form-control", @placeholder = "Password", @id = "CTC_accountPassword", @type = "password", @autocomplete = "current-password" } })
            </div>
            <div class="col-sm-10">
                @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
    </div>
}

[HttpPost]
公共异步任务提交（RegisterViewModel模型）
{
如果（！ModelState.IsValid）
{
返回视图（模型）；
}
}
}

查看：

[Required(ErrorMessage = "Account name is required")]
[EmailAddress]
public string CTC_accountName { get; set; }

[Required(ErrorMessage = "Password is required")]
[DataType(DataType.Password)]
public string CTC_accountPassword { get; set; }

[HttpPost]
public async Task<IActionResult> Submit(RegisterViewModel model)
{
        if (!ModelState.IsValid)
        {
          return View(model);
        }
    }
}

@using (Html.BeginForm("Submit", "Register", FormMethod.Post, new { id = "formAll", style = "margin-top:3%", enctype = "multipart/form-data" }))
{

    <div class="shadow-sm p-2 mb-3 rounded">
        <div class="col-sm-9">
            <h5>Personal Details</h5>
        </div>
    </div>
    <div id="formMember">
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountName, "Account/Email*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountName, new { htmlAttributes = new { @class = "form-control", @placeholder = "Email", @id = "CTC_accountName", @autocomplete = "username" } })
            </div>
            <div class="col-sm-10">
                 @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
        <div class="form-group row">
            <div class="col-sm-2">
                @Html.LabelFor(model => model.CTC_accountPassword, "Password*")
            </div>
            <div class="col-sm-10">
                @Html.EditorFor(model => model.CTC_accountPassword, new { htmlAttributes = new { @class = "form-control", @placeholder = "Password", @id = "CTC_accountPassword", @type = "password", @autocomplete = "current-password" } })
            </div>
            <div class="col-sm-10">
                @Html.ValidationMessageFor(model => model.CTC_accountName)
            </div>
        </div>
    </div>
}

@使用（Html.BeginForm（“Submit”、“Register”、FormMethod.Post、new{id=“formAll”、style=“margin top:3%”、enctype=“multipart/form data”}））
{
个人资料
@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@Html.LabelFor（model=>model.CTC_accountName，“Account/Email*”）
@EditorFor（model=>model.CTC_accountName，new{htmlAttributes=new{@class=“form control”，@placeholder=“Email”，@id=“CTC_accountName”，@autocomplete=“username”}）
@Html.ValidationMessageFor（model=>model.CTC\u accountName）
@Html.LabelFor（model=>model.CTC\u accountPassword，“Password*”）
@EditorFor（model=>model.CTC_accountPassword，new{htmlAttributes=new{@class=“form control”、@placeholder=“Password”、@id=“CTC_accountPassword”、@type=“Password”、@autocomplete=“current Password”}）
@Html.ValidationMessageFor（model=>model.CTC\u accountName）
}

---

我很感激你的帮助

我发现了问题所在

---

我不得不删除提交函数中的POST-call-ajax，以查看@Html.ValidationSummary

您的视图名为“Submit.cshtml”吗？@howcheng不，我的视图名为Register.cshtmlh这可能是您的问题。如果返回

视图（模型）

，则ASP.NET将查找具有相同操作名称的视图。您需要

返回视图（“Register”，model）

而不是.Thx。遗憾的是，它仍然不起作用。