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，同时也希望多多支持！
