利用js取得下拉框中所選的值

現在的需求是：下拉框中要是選擇加盟商讓其繼續選擇學校，要是選擇平台管理員則不需要選擇學校。隱藏選擇下拉清單。

選擇列舉值：

/// <summary>
/// 平台角色
/// </summary>
public enum AdministratorRole
{
 [Display(Name = "平台管理员")]
 PlatformAdministrator = 1,
 [Display(Name = "加盟商")]
 JoiningTrader = 10
}

   

選擇列舉值：

<div class="form-group">
  @Html.LabelFor(x => x.AdministratorRole, new { @class = "col-sm-2 control-label" })
  <div class="col-sm-8">
   @Html.EnumDropDownListFor(x => x.AdministratorRole, new { @class = "form-control", onChange = "showSchool(this.value)", placeholder = Html.DisplayNameFor(x => x.AdministratorRole) })
  </div>
  <div class="col-sm-2">
   <div class="help-block">@Html.ValidationMessageFor(x => x.AdministratorRole)</div>
  </div>
 </div>
 <div class="form-group" style="display:none" id="schoolSelect">
  @Html.LabelFor(x => x.SchoolId, new { @class = "col-sm-2 control-label" })
  <div class="col-sm-8">
   @Html.DropDownListFor(x => x.SchoolId, Model.Schools, new { @class = "form-control", placeholder = Html.DisplayNameFor(x => x.SchoolId) })
  </div>
  <div class="col-sm-2">
   <div class="help-block">@Html.ValidationMessageFor(x => x.SchoolId)</div>
  </div>
 </div>

   

代碼：

<script type="text/javascript">
 function showSchool(v){ 
  if (10 == v) {
   document.getElementById("schoolSelect").style = "display:inline";
  } else {
   document.getElementById("schoolSelect").style = "display:none";
  }
 }
</script>

   

:

   

: 我們利用下拉框的onChange事件來讓其執行設定的方法showSchool(),這裡面的參數是我們選擇的值，this代表的AdministratorRole。

js程式碼：rrreee

這樣就可以了。 🎜🎜效果：🎜🎜🎜🎜🎜以上就是本文的全部內容，希望對大家有幫助🎜