Question

在MVC中，我尝试将消息重定向到Error页面。错误页面将打开但我没有收到任何错误消息。这是启动流程的方法。

        [HttpPost]
    public ActionResult SaveSurvey(vmFollowUpSurvey model)
        { 
        var result = surveyBL.postSurveyResults(model);

        if (result != "Record Saved")
            {
            ModelState.AddModelError(string.Empty, "Survey not saved");
            var redirectUrl = new UrlHelper(Request.RequestContext).Action("Index", "Error");
            return Json(new { Url = redirectUrl });
            }
        else
            {
            ModelState.AddModelError(string.Empty, "Survey completed");
            var redirectUrl = new UrlHelper(Request.RequestContext).Action("Index", "Login");
            return Json(new { Url = redirectUrl });
            }

        }

我的ErrorController然后有一个

的方法

        public ActionResult Index()
        {
        return View();
        }

我的视图显示为

<h2>Survey Information Page</h2>

<div>

@using (Html.BeginForm("Index", "Error"))
{
<div class="container">
    <div class="row">
        @Html.ValidationSummary(false, "", new { @class = "text-info" })
    </div> 
</div>
}


</div>

那么我怎么做才能让它显示出来呢？

Answer 1

             [HttpPost]
    public ActionResult SaveSurvey(vmFollowUpSurvey model)
        { 
        var result = surveyBL.postSurveyResults(model);

        if (result != "Record Saved")
            {        
                return RedirectToAction("Index", "Error", new  {  ErrorMessage=  "Survey not saved"} );
            }
        else
            {
            ModelState.AddModelError(string.Empty, "Survey completed");
            var redirectUrl = new UrlHelper(Request.RequestContext).Action("Index", "Login");
            return Json(new { Url = redirectUrl });
            }

        }


        --- ErrorModel Class

        namespace WebApplication3.Models
    {
        public class ErrorModel
        {
            public string ErrorMessage { get; set; }
        }
    }

    --- Error Index.html code 

    @model WebApplication3.Models.ErrorModel
    <h2>Survey Information Page</h2>

    <div>

        @using (Html.BeginForm("Index", "Error"))
        {
            <div class="container">
                <div class="row">
                    @Html.ValidationSummary(false,  Model.ErrorMessage  , new { @class = "text-info" })
                </div>
            </div>
        }


    </div>

Answer 2

您的ErrorController.Index()方法不了解所使用的模型，因此将消息添加到ModelState将意味着您的错误页面无法访问它。如果您要重定向到不同的视图，处理此问题的正确方法是将错误放在Session内。

if (result != "Record Saved")
{
    Session["Error"] = "Survey not saved";
    ...
}

然后在您的错误视图中，您可以执行以下操作：

<h2>Survey Information Page</h2>

<div>

    @using (Html.BeginForm("Index", "Error"))
    {
        <div class="container">
            <div class="row">
                <span class="error-message">@Session["Error"]</span>
            </div> 
        </div>
    }

</div>

MVC重定向到错误页面不显示消息

2 个答案: