Question

我是MVC的新手，所以我并不完全确定我将模型绑定到控制器并按原样查看。发生错误后，我试图弹出一条消息。在这种情况下，单击提交按钮后会发生错误。

观点......

@if (ViewBag.Message != null)
{
<script>

    $(document).ready(function () {

        alert('@ViewBag.Message');

    });

</script>

}
<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Guru Dental: Request Demo</title>

    <!-- CSS -->
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Open+Sans:400italic,400">
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Droid+Sans">
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Lobster">
    <link rel="stylesheet" href="~/Content/assets/bootstrap/css/bootstrap.min.css">
    <link rel="stylesheet" href="~/Content/assets/font-awesome/css/font-awesome.min.css">
    <link rel="stylesheet" href="~/Content/assets/css/animate.css">
    <link rel="stylesheet" href="~/Content/assets/css/magnific-popup.css">
    <link rel="stylesheet" href="~/Content/assets/flexslider/flexslider.css">
    <link rel="stylesheet" href="~/Content/assets/css/form-elements.css">
    <link rel="stylesheet" href="~/Content/assets/css/style.css">
    <link rel="stylesheet" href="~/Content/assets/css/media-queries.css">

    <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
        <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
        <script src="https://oss.maxcdn.com/libs/respond.js/1.4.2/respond.min.js"></script>
    <![endif]-->

    <!-- Favicon and touch icons -->
    <link rel="shortcut icon" href="~/images/favicon.ico" type="image/x-icon">
    <link rel="icon" href="~/images/favicon.ico" type="image/x-icon">

</head>

<body>

    <!-- Top menu -->
    <nav class="navbar" role="navigation">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#top-navbar-1">
                    <span class="sr-only">Toggle navigation</span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>
                <br>
                <a href="http://www.gurudental.com/"><img class="logo-size" src="~/images/guru-dental-slogan.png" alt=""></a>
            </div>
            <!-- Collect the nav links, forms, and other content for toggling -->
            <div class="collapse navbar-collapse" id="top-navbar-1">
                <ul class="nav navbar-nav navbar-right">
                    <li><a href='@Url.Action("Index", "Home")'><br><br>Home</a></li>
                    <li>
                        <a href='@Url.Action("Contact", "Home")'><br><br>Contact</a>
                    </li>
                </ul>
            </div>
        </div>
    </nav>

    <!-- Page Title -->
    <div class="page-title-container">
        <div class="container">
            <div class="row">
                <div class="col-sm-12 wow fadeIn">
                    <h1>Demo Request</h1>
                </div>
            </div>
        </div>
    </div>

    <!-- Contact Us -->
    <div class="contact-us-container">
        <div class="container">
            <div class="row">
                <div class="col-sm-7 contact-form wow fadeInLeft">
                    @using (Html.BeginForm("DemoSubmit", "CRM", FormMethod.Post))
                    {
                        <h2>Rep Details</h2>
                        <div class="form-group">
                            <label for="contact-firstname">HSD Rep Code</label>
                            <input type="text" name="hsdrepcode" placeholder="Enter your HSD Rep code..." class="contact-name" id="contact-name">
                        </div>
                        <div class="form-group">
                            <label for="contact-lastname">Rep First Name</label>
                            <input type="text" name="hsfirstname" placeholder="Enter your Rep first name..." class="contact-name" id="contact-name">
                        </div>
                        <div class="form-group">
                            <label for="contact-lastname">Rep Last Name</label>
                            <input type="text" name="hslastname" placeholder="Enter your Rep last name..." class="contact-name" id="contact-name">
                        </div>
                        <h2>Doctor Details</h2>
                        <div class="form-group">
                            <label for="contact-currentlocation">Doctor's First Name</label>
                            <input type="text" name="firstname" placeholder="Enter your doctor's first name.." class="contact-subject" id="contact-subject">
                        </div>
                        <div class="form-group">
                            <label for="contact-currentlocation">Doctor's Last Name</label>
                            <input type="text" name="lastname" placeholder="Enter your doctor's last name..." class="contact-subject" id="contact-subject">
                        </div>
                        <div class="form-group">
                            <label for="contact-currentlocation">Doctor's Phone Number</label>
                            <input type="text" name="phonenumber" placeholder="Enter your doctor's phone number..." class="contact-subject" id="contact-subject">
                        </div>
                        <div class="form-group">
                            <label for="contact-currentlocation">Doctor's E-mail</label>
                            <input type="text" name="emailaddress" placeholder="Enter your doctor's e-mail..." class="contact-subject" id="contact-subject">
                        </div>
                        <button type="submit" class="btn">Submit</button>
                    }
                </div>

控制器......

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

[HttpPost]
public ActionResult DemoSubmit(LeadInfo leadInfo)
{
    string salesEmail = CRMModels.GetNextSalesEmail();

    ViewBag.Message = CRMModels.AddLeadToCRM(leadInfo);

    if (ViewBag.Message == null)
    {
        EmailModels.SendEmailForLead(leadInfo, salesEmail);

        return RedirectToAction("Index", "Home");
    }
    else
        return RequestDemo();
    }
}

模特......

if (hsdRepId != Guid.Empty)
{
    lead.Attributes["ree_hsdrepresentative"] = new EntityReference("ree_henryscheinrepresentative", hsdRepId);

    service.Create(lead);
}
else
{
    message = "Invalid HSD Representative Code";
}

return message;

在DemoSubmit函数中，如果有要显示的消息，我需要返回视图才能显示它。我怎么做？我尝试使用重定向，但这只是给了我一个新的页面，没有输入的数据，也没有显示消息。

谢谢，加里

Answer 1

在控制器出现错误后，您可以向modalState添加错误消息

ModelState.AddModelError("", "Invalid HSD Representative Code");

并弹出错误提示，您可以使用html扩展方法弹出消息

public static HtmlString PopAlert(this HtmlHelper htmlHelper, string alertType = "danger",
    string heading = "")
{
    if (htmlHelper.ViewData.ModelState.IsValid)
        return new HtmlString(string.Empty);

    var sb = new StringBuilder();

    sb.AppendFormat("<div class=\"alert alert-{0} alert-block\">", alertType);
    sb.Append("<button class=\"close\" data-dismiss=\"alert\" aria-hidden=\"true\">&times;</button>");

    if (!heading.IsNullOrWhiteSpace())
    {
        sb.AppendFormat("<h4 class=\"alert-heading\">{0}</h4>", heading);
    }

    sb.Append(htmlHelper.ValidationSummary());
    sb.Append("</div>");

    return new HtmlString(sb.ToString());
}

在视图中，您只需像这样调用Html扩展方法

 @Html.PopAlert()

希望这会对你有所帮助:)。

Answer 2

您的代码存在许多问题，特别是您没有将任何控件绑定到模型的事实，因此返回视图将始终显示空控件。您还应该在属性中包含验证属性，以防止发布和保存可能有害的数据。您的视图也会生成无效的html（许多重复的id属性）和<label>标签，这些标签并非真正的标签（点击它们不会将焦点设置为关联的控件，因为您没有将它们与控制。

根据您的观点，您的LeadInfo类看起来像（添加建议的属性）

public class LeadInfo
{
  [Display(Name = "HSD Rep code")]
  [Required(ErrorMessage = "Please enter your HSD Rep code")]
  public string hsdrepcode { get; set; }
  [Display(Name = "Rep first name")]
  [Required(ErrorMessage = "Please enter your Rep first name")]
  public string hsfirstname { get; set; }
  .....
  [Display(Name = "Doctor's e-mail")]
  [Required(ErrorMessage = "Please enter your doctor's e-mail")]
  [EmailAddress]
  public string emailaddress{ get; set; }   
}

然后你应该

public ActionResult RequestDemo()
{
  LeadInfo model = new LeadInfo();
  return View(model);
}

然后视图应强烈输入html helper以绑定到您的属性并显示验证错误

@model LeadInfo
....
@using(Html.BeginForm())
{
  @Html.AntiForgeryToken()
  @Html.ValidationSummary(true) // this is where you custom error message will be displayed

  @Html.LabelFor(m => m.hsdrepcode) // displays the text associated with the DisplayAttribute and is associated with the following textbox
  @Html.TextBoxFor(m => m.hsdrepcode, new { placeholder="Enter your HSD Rep code...", @class="contact-name"})
  @Html.ValidationMessageFor(m => m.hsdrepcode)
  ....
  <button type="submit" class="btn">Submit</button>
}

您还应该包含以下脚本（最好使用@Scripts.Render()以及MVC的捆绑和缩小功能）

jquery-{version}.js
jquery.validate.js
jquery.validate.unobtrusive.js

您还应该使用布局（母版页）

后方法是

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult RequestDemo(LeadInfo model) // not sure why you would change the name of the method?
{
  if(!ModelState.IsValid)
  {
    return View(model); // return the view to fix any validation errors
  }
  string errorMessage = CRMModels.AddLeadToCRM(leadInfo);
  if (errorMessage == null)
  {
    string salesEmail = CRMModels.GetNextSalesEmail();
    EmailModels.SendEmailForLead(leadInfo, salesEmail);
    return RedirectToAction("Index", "Home");
  }
  else
  {
    ModelState.AddModelError("", errorMessage);
    return View(model);
  }
}

您不清楚要返回的错误消息是什么，但您的代码表明它可能与hsdrepcode属性相关联，在这种情况下，修改代码以将错误与特定属性相关联

ModelState.AddModelError("hsdrepcode", errorMessage);

旁注：您的大多数代码都忽略了使用MVC的好处，以至于您可能不会使用它。我建议你去MVC网站并完成教程，

单击提交按钮后的ASP.Net MVC弹出消息

2 个答案: