现在的需求是：下拉框中要是选择加盟商让其继续选择学校，要是选择平台管理员则不需要选择学校。隐藏选择下拉列表。
选择枚举值：
/// <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 }
代码：
<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>
先让学校列表隐藏，style=”display:none”;效果和下图一样。我们利用下拉框的onchange事件来让其执行设定的方法showschool(),这里面的参数是我们选择的值，this代表的administratorrole。
js代码：
<script type="text/javascript"> function showschool(v){ if (10 == v) { document.getelementbyid("schoolselect").style = "display:inline"; } else { document.getelementbyid("schoolselect").style = "display:none"; } } </script>
这样就可以了。
效果：
以上就是本文的全部内容，希望对大家有所帮助