easyui 如何为标签动态追加属性实现渲染效果

简述一下在项目遇到的问题，这边有一个需求，选择不同类型，加载不同的div标签（其中属性是否必填是区分类型的关键）

html界面是这样的

<div class="grid_1 lbl">规则类型：</div>
<div class="grid_3 val"><input type="text" data-bind="comboboxValue:form.RULETYPE, datasource:dataSource.RuleTypes,comboboxReadOnly:readonly"  data-options="onChange:RuleTypeChange"   
class="z-txt easyui-combobox" required="true" /></div>
<div class="clear"></div>   
 <div id="showDiv">
        <div class="grid_1 lbl">规则对象：</div>
        <div class="grid_3 val">
            <input id="boTable" data-bind="combogridValue:form.BOCLASS,combogridReadOnly:readonly"  class="z-txt easyui-combogrid"
                   data-options="panelWidth:600, mode: 'remote', rownumbers:true,
            idField:'MID',
            textField:'CODENAME',
            pagination:true,
            method: 'get',
            loadMsg: '正在加载数据...',
             url:'/api/Psb/PssValidateRule/GetBoClass',
            columns:[[
                { field: 'MID', title: 'MID', width:  },
                { field: 'CODENAME', title: '名称', width:  },
                { field: 'FULLNAME', title: '对象全名', width: ,hidden:true},
                { field: 'TABLENAME', title: '对象名', width: ,hidden:true},
            ]],
         fitColumns: true,
         onSelect:onSelectSourceBill
        " />
        </div>

        <div class="grid_1 lbl">计费对象：</div>
        <div class="grid_3 val">
            <input id="boField" data-bind="combogridValue:form.BOFIELD,combogridReadOnly:readonly"   class="z-txt easyui-combogrid" />
        </div>
        <div class="grid_1 lbl">开始数量：</div>
        <div class="grid_3 val"><input id="beginNum" type="text" data-bind="numberboxValue:form.BEGINNUM,numberboxReadOnly: readonly"  class="z-txt easyui-numberbox" data-options="min: 0, precision: 0" /></div>
        <div class="clear"></div>

        <div class="grid_1 lbl">规则条件：</div>
        <div class="grid_3 val"><input id="costWhere" type="text" data-bind="value:form.COSTWHERE,readOnly:readonly"  class="z-txt easyui-validatebox" /></div>
        <div class="grid_1 lbl">计算函数：</div>
        <div class="grid_3 val"><input id="costMethod" type="text" data-bind="value:form.COSTMETHOD,readOnly:readonly"  class="z-txt easyui-validatebox" /></div>
        <div class="grid_1 lbl">结束数量：</div>
        <div class="grid_3 val"><input id="endNum"  type="text" data-bind="numberboxValue:form.ENDNUM,numberboxReadOnly: readonly"  class="z-txt easyui-numberbox" data-options="min: 0, precision: 0"  /></div>
        <div class="clear"></div>
    </div>

    <div class="grid_1 lbl">计费单价：</div>
    <div class="grid_3 val"><input type="text" data-bind="numberboxValue:form.COSTPRICE,numberboxReadOnly: readonly" class="z-txt easyui-numberbox" data-options="min: 0, precision: 2" required="true"  /></div>
    <div class="grid_1 lbl">超出单价：</div>
    <div class="grid_3 val"><input type="text" data-bind="numberboxValue:form.OVERPRICE,numberboxReadOnly: readonly" class="z-txt easyui-numberbox" data-options="min: 0, precision: 2" /></div>
    <div class="clear"></div>

在选择规则类型时，动态隐藏显示divc层，当显示div层时，为div下的每个标签添加必填属性；反之，移除对应标签的必填属性

js方法

            //加载时，默认隐藏div
            $("#showDiv").attr("style", "display:none;");   //隐藏div
            //获取规则类型
            var ruleType = @((int)Dxc.Persistent.DxcEnumCostRuleType.Change);  //变动
            //规则类型切换
            RuleTypeChange = function (newValue, oldValue) {
                //当规则类型是变动时
                if (newValue == ruleType)
                {
                    $("#showDiv").attr("style", "display:block;");   //显示div
                    //jquery 动态追加属性（已追加，不渲染效果）
                    //$('#boTable').attr("required",true);
                    //easyui 动态追加属性
                    $('#boTable').combogrid({required:true});
                    $('#boField').combogrid({required:true});
                    $('#beginNum').numberbox({required:true});
                    $('#endNum').numberbox({required:true});
                    $('#costWhere').validatebox({required:true});
                    $('#costMethod').validatebox({required:true});

                }else{
                    $("#showDiv").attr("style", "display:none;");   //隐藏div
                    //jquery 动态移除属性（已移除，不渲染效果）
                    //$('#boTable').removeAttr("required");
                    //easyui 动态移除属性
                    $('#boTable').combogrid({required:false});
                    $('#boField').combogrid({required:false});
                    $('#beginNum').numberbox({required:false});
                    $('#endNum').numberbox({required:false});
                    $('#costWhere').validatebox({required:false});
                    $('#costMethod').validatebox({required:false});
                }
            }

注意：原先考虑用jquery的动态添加属性和移除属性，但是出现一种情况，debug查看页面是加上属性了，但是界面没有渲染，所以改用easyui的方式

切换界面效果

1）图1

2）图2

参考来源：

http://www.mamicode.com/info-detail-2243131.html