Jquery 如何在MVC中根据下拉选择设置验证？

以下是我的查看代码：

<div class="form-group-1">
  @Html.LabelFor(model => model.device.HasAMC, htmlAttributes: new { @class = "control-label col-lg-4" })
  @Html.EditorFor(model => model.device.HasAMC, new { htmlAttributes = new { @class = "form-control" } })
 </div>
 <div class="form-group-1" id="HasDate">
    @Html.LabelFor(model => model.device.AMCExpiredDate, htmlAttributes: new { @class = "control-label col-lg-4" })
    @Html.EditorFor(model => model.device.AMCExpiredDate, new { htmlAttributes = new { @class = "form-control", placeholder = "AMCExpireDate(MM/dd/yyyy)", required = "required", title = "Enter AMC Expire Date" } })
 </div>
<button style="margin-left:33%;" class="btn btn-sm btn-primary col-lg-2 " type="button" name="action" onclick="javascript:Save(@ViewBag.DealerId);" value="SaveDeviceInfo"><strong>Save</strong></button>

@LabelFor（model=>model.device.HasAMC，htmlAttributes:new{@class=“controllabel col-lg-4”}）
@EditorFor（model=>model.device.HasAMC，new{htmlAttributes=new{@class=“form control”}）
@LabelFor（model=>model.device.AMCExpiredDate，htmlAttributes:new{@class=“control label col-lg-4”}）
@Html.EditorFor（model=>model.device.AMCExpiredDate，new{htmlAttributes=new{@class=“form control”，placeholder=“AMCExpireDate（MM/dd/yyyyy）”，required=“required”，title=“Enter AMC Expire Date”}）
保存

在这里，我需要设置必填字段“AMCExpiredDate”，就像“HasAMC”的值选择“true”一样，然后对必填字段应用验证，如果为false，则从“AMCExpiredDate”中删除验证

这在MVC中可能吗？ 请帮帮我。提前谢谢

把你的观点改成这样

---

考虑一个<代码> [Reavdif] < /C>或类似的验证属性（或者您可以自己编写）可能的复制品，只需在jchange中执行，在Onchange事件上，将验证属性添加到DROPNDOWN感谢中。但我只需要在客户端而不是服务器端使用它，所以这并不是什么大问题，您所需要的只是在按钮函数“onclick=”javascript:Save（@ViewBag.DealerId）后面放置一个验证逻辑；“例如，代码if（$（'#HasAMC'）.val（）==true）{//验证日期}”

 <div class="form-group-1">
      @Html.LabelFor(model => model.device.HasAMC, htmlAttributes: new { @class = "control-label col-lg-4" })
      @Html.EditorFor(model => model.device.HasAMC, new { htmlAttributes = new { @class = "form-control" } })
     </div>
     <div class="form-group-1" id="HasDate">
        @Html.LabelFor(model => model.device.AMCExpiredDate, htmlAttributes: new { @class = "control-label col-lg-4" })
        @Html.EditorFor(model => model.device.AMCExpiredDate, new { htmlAttributes = new { @class = "form-control", placeholder = "AMCExpireDate(MM/dd/yyyy)", required = "required", title = "Enter AMC Expire Date" } })

        // put validation-error  
      @Html.ValidationMessageFor(model => model.device.AMCExpiredDate);
                                    @if (@ViewData.ModelState["AMCExpiredDate"] != null && @ViewData.ModelState["AMCExpiredDate"].Errors.Count > 0)
                                    {
                                        <br/>
                                        <span class="field-validation-error col-md-10" style="margin-left: -14px;">
                                        @ViewData.ModelState["AMCExpiredDate"].Errors[0].ErrorMessage.Trim()
                                    </span>
                                    }

     </div>
    <button style="margin-left:33%;" class="btn btn-sm btn-primary col-lg-2 " type="button" name="action" onclick="javascript:Save(@ViewBag.DealerId);" value="SaveDeviceInfo"><strong>Save</strong></button>


            // create hidden field of your model variables
                 @Html.HiddenFor(modelItem => model.device.HasAMC)
                 @Html.HiddenFor(modelItem => model.device.HasAMC)

public ActionResult SaveMarks(mymodelClass model)

            if (model.device.HasAMC)
            {
               // validat you AMCExpiredDate expir date e.georgian
               if(model.device.AMCExpiredDate == null)
               {
                ModelState.AddModelError("AMCExpiredDate", "Please Proive you AMCExpiredDate");
               }
            }