在Extjs中动态增加控件

  Ext.onReady(function () {Ext.QuickTips.init();Ext.form.Field.prototype.msgTarget = 'side';var autoloadcontrol =new  Ext.form.FieldSet({layout: "column",title: "属性表单",})var addForm = new Ext.FormPanel({title: "<div align='center'>产品属性管理</div>",id: "addForm",name: "addForm",renderTo: Ext.getBody(),autoHeight: true,autoWidth: true,labelWidth: 80,frame: true,items:  autoloadcontrol,bbar: [{xtype: "button",text:"addform", listeners: {"click": function () {Ext.Ajax.request({url: "/PropertyManage/ProductPropertyInfo.aspx",params: {  op: "test" },success: function (response) {//后台得到字符串autoloadcontrol.add(eval(response.responseText))autoloadcontrol.doLayout();   //用来刷新FormPanel},})}}}]});});            

　　

        protected void Page_Load(object sender, EventArgs e){switch (Request["op"]){case "test":Response.Write("new Ext.form.TextField({filedLabel:'标题',emptyText:'请输入内容',allowBlank:false,maxLength:50})");Response.End();break;}}