ajax异步加载TreeGrid数据,使用empty()清空原始数据

来源：互联网发布：主题制作软件下载编辑：程序博客网时间：2024/05/16 17:11

$(document).ready(function(){var treeGrid;//初始化TreeGrid数据getTreeGridDate();});function getTreeGridDate(idMerchant){if(!idMerchant){idMerchant=-1;}$.ajax(type:"get",url:basePath + “xxx/xxx/xx.do?adt=”+new Date().getTime(),data:{"idMerchant":idMerchant},dataType:"json",success:function(data){//后端返回json格式的字符串if(data){$("div1").empty();//清空原来的TreeGridvar  dataTreeGridSource = eval(data);//转成数组对象var config = {            id: "tg1",            width: "800",            renderTo: "div1",            headerAlign: "left",            headerHeight: "30",            dataAlign: "left",            indentation: "20",            folderOpenIcon: "images/folderOpen.gif",            folderCloseIcon: "images/folderClose.gif",            defaultLeafIcon: "images/defaultLeaf.gif",            hoverRowBackground: "false",            folderColumnIndex: "1",            itemClick: "itemClickEvent",            columns: [            { headerText: "", headerAlign: "center", dataAlign: "center", width: "20", handler: "customCheckBox" },{ headerText: "名称", dataField: "name", headerAlign: "center", handler: "customOrgName" },{ headerText: "拼音码", dataField: "code", headerAlign: "center", dataAlign: "center", width: "100" },{ headerText: "负责人", dataField: "assignee", headerAlign: "center", dataAlign: "center", width: "100" }],            data:dataTreeGridSource         };               //创建一个组件对象        treeGrid = new TreeGrid(config);        treeGrid.show(); }else if(!data){$("div1").empty();$("div1").append("<table id=\"tg1\" ................暂无数据....");}},error:function(){alert("查询异常，请稍后再试或联系管理员。。。");}});}

如果是修改或者展示已经勾选的,则需要先查出已经勾选过的id数组，然后再在customCheckBox（）方法中进行判断处理：

var idArray = ...;//从后台查询得到

function customCheckBox(row, col) {

for(var i in idArray){

if(idArray[i] == row.idOper){

return "<input type='checkbox' name='idCategory' value="+row.idOper+" check='checked'>";

}

}
return "<input type='checkbox' name='idCategory' value="+row.idOper+">";
}

此外empty（）函数在做清除原来数据方面有很大作用。如级联下拉的清除也需要如此。

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