Question

用户需要选择卖家类型才能注册帐户。

如果用户选择“私人”，则ROC输入无需输入数据。但如果用户选择“公司”，则用户需要在ROC中输入数据

所以我做的是，如果用户选择卖家类型为'公司'，我会在Jquery的视图中隐藏名为 rocDiv 的div。

在服务器端，我还会检查双重确认。

问题是，如果用户选择卖方类型为“私有”，则ModelState.IsValid属性保持返回false。

此处为代码段

模型 CreateNiagaModel

 public class CreateNiagaModel
        {
            [DisplayName("Merchant Name : ")]
            [Required]
            [MaxLength(20)]
            public string merchant { get; set; }

            [DisplayName("Merchant Description : ")]
            [Required]
            [DataType(DataType.MultilineText)]
            [MaxLength(250)]
            public string merchant_desc { get; set; }

            [DisplayName("Seller Type : ")]
            [Required]
            public string sellerType { get; set; }

            [DisplayName("ROC : ")]               
            public string roc{ get; set; }
}

浏览

@{
    List<SelectListItem> listItems = new List<SelectListItem>();
    listItems.Add(new SelectListItem
         {
             Text = "Private",

             Value = "private"
         });
    listItems.Add(new SelectListItem
         {
             Text = "Company",
             Value = "company"
         });
}

@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{

<div class="form-group">
                    @Html.LabelFor(model => model.merchant, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.merchant, new { htmlAttributes = new { @class = "form-control", @placeholder = "Your business name", @title = "Testing" } })
                        @Html.ValidationMessageFor(model => model.merchant, "", new { @class = "text-danger" })
                    </div>
                </div>

<div class="form-group">
                    @Html.LabelFor(model => model.merchant_desc, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.merchant_desc, new { htmlAttributes = new { @class = "form-control", @placeholder = "Explain about your business", @rows = 5 } })
                        @Html.ValidationMessageFor(model => model.merchant_desc, "", new { @class = "text-danger" })
                    </div>
                </div>

<div class="form-group">
                    @Html.LabelFor(model => model.sellerType, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.DropDownListFor(model => model.sellerType, listItems, "--Select Type--", new { @class = "form-control", @id = "sellType" })
                        @Html.ValidationMessageFor(model => model.sellerType, "", new { @class = "text-danger" })
                    </div>
                </div>

<div class="form-group" id="rocDiv">
                    @Html.LabelFor(model => model.roc, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.roc, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(model => model.roc, "", new { @class = "text-danger" })
                    </div>
                </div>

<div class="form-group">
                <div class="col-md-offset-2 col-md-10">
                    <input type="submit" value="Register" class="btn btn-success" />
                </div>
            </div>
}

@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
<script type="text/javascript">
     $('#rocDiv').hide();
     $('#sellType').change(function () {
      var value = $(this).val();
      if (value == 'company') {
         $('#rocDiv').show();
        } else {
         $('#rocDiv').hide();
        }
       });
</script>
}

控制器

[HttpPost]
public ActionResult Register(CreateNiagaModel CN)
{
    if (ModelState.IsValid)
    {
       //Do some logic
    }
    else
    {
      //Code always go here if user select 'private' in seller type
    }
}

我该如何解决这个问题？或者我可以做任何其他方式吗？抱歉我的英文不好

Answer 1

您可以实施IValidatableObject界面。

public class CreateNiagaModel : IValidatableObject
{
    [DisplayName("Merchant Name : ")]
    [Required]
    [MaxLength(20)]
    public string merchant { get; set; }

    [DisplayName("Merchant Description : ")]
    [Required]
    [DataType(DataType.MultilineText)]
    [MaxLength(250)]
    public string merchant_desc { get; set; }

    [DisplayName("Seller Type : ")]
    [Required]
    public string sellerType { get; set;

    [DisplayName("ROC : ")]               
    public string roc{ get; set; }

    public IEnumerable<ValidationResult> Validate(ValidationContext ctx)
    {
        if (sellerType == "company" && string.IsNullOrEmpty(roc))
        {
            yield return new ValidationResult("ROC is required when seller type is Company", new[] { "roc" });
        }
    }
}

此验证逻辑由MVC在验证视图模型时执行，如果在此处使用相同模型，则在保存更改时由实体框架执行。

编辑：我重读了你的问题，我可能第一次误解了它。当卖家类型为“私人”时，ModelState.IsValid看起来应该是真的。我会在if (ModelState.IsValid)行设置断点并检查错误，以确切了解导致验证失败的原因。

当文本框被隐藏时，ModelState.IsValid返回false

1 个答案: