jQuery EasyUI datagrid在翻页以后仍能记录被选中行的实现代码

2019-11-20 09:14:38

字体：大中小

来源：转载

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1、先给出问题解决后的代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><base href="<%=basePath%>"><title>添加优惠券步骤2</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><jsp:include page="../layout/script.jsp"></jsp:include><c:set var="getDataUrl" value="${pageContext.request.contextPath}/goods/getGoodsOnSale" scope="request" /><script type="text/javascript">var $dg;var $grid;var ids = '';var idsArray = new Array();$(function() {$dg = $("#dg");$grid=$dg.datagrid({url : "${getDataUrl}",width : 'auto',height : $(this).height()-85,pagination:true,rownumbers:true,border:true,striped:true,singleSelect:false,checkOnSelect:true,selectOnCheck:true,onBeforeLoad:function(data){addSelectedGoodsIdToArray();},onLoadSuccess:function(data){var rowsData = data.rows;if(idsArray.length!=0){$.each(idsArray,function(i,e){for(var index=0;index<rowsData.length;index++){if(rowsData[index].goodsId==e){$dg.datagrid('selectRow',index);}}});}},onUncheck:function(rowIndex,rowData){if(idsArray.length == 0){}else{for(var index=0;index<idsArray.length;index++){if(idsArray[index] == rowData.goodsId){removeArrayValue(idsArray,rowData.goodsId);break;}}}},columns : [ [ {field:'ck',checkbox:true},{field : 'goodsId',hidden:true},{field : 'goodsName',title : '商品标题',width : parseInt($(this).width()*0.3)},{field : 'img1',title : '图片',width : parseInt($(this).width()*0.1),align : 'left',formatter:function(value,row){if(row.img1 != '')return "<img src = '"+row.img1+"'/>";elsereturn "<img src = '"+row.img1+"'/>"; }},{field : 'categoryId',title : '分类',width : parseInt($(this).width()*0.1),align : 'left',formatter:function(value,row){var cates = row.categorys;for(var i=0;i<cates.length;i++){if(cates[i].categoryId === row.categoryId){return cates[i].categoryName;}} }},{field : 'goodsNumber',title : '库存',width : parseInt($(this).width()*0.1)},{field : 'isOnSale',title : '上架',width :parseInt($(this).width()*0.1),align : 'left',formatter:function(value,row){if(row.isOnSale){return "<font color=green>是<font>";} else{return "<font color=red>否<font>"; }}},{field : 'lastUpdate',title : '上架时间',width : parseInt($(this).width()*0.1),align : 'left',formatter:function(value,row){var thisDate = new Date(row.lastUpdate);return formatterDate(thisDate);}}] ],toolbar:'#tb'});//搜索框/* $("#searchbox").searchbox({ menu:"#mm", prompt :'模糊查询',searcher:function(value,name){ var str="{/"searchName/":/""+name+"/",/"searchValue/":/""+value+"/"}";var obj = eval('('+str+')');$dg.datagrid('reload',obj); }}); */});function addCheckedGoodIdToArray(rowIndex,rowData){console.log("_________________________");var idsArrayLength = idsArray.length;if(idsArray.length == 0){console.log("push:"+rowData.goodsId);idsArray.push(rowData.goodsId);}else{for(var index=0;index<idsArrayLength;index++){if(idsArray[index] == rowData.goodsId){console.log("remove:"+rowData.goodsId);removeArrayValue(idsArray,rowData.goodsId);break;}if(index == idsArrayLength-1){console.log("push:"+rowData.goodsId);idsArray.push(rowData.goodsId);}}}console.log("---------------");for(var index=0;index<idsArray.length;index++){console.log(idsArray[index]);}console.log("---------------");}function addSelectedGoodsIdToArray(){var rows = $dg.datagrid('getSelections');if(rows.length>0){$.each(rows,function(i,row){if(idsArray.length == 0){idsArray.push(row.goodsId);}else{for(var index=0;index<idsArray.length;index++){if(idsArray[index] == row.goodsId){break;}if(index == idsArray.length-1){idsArray.push(row.goodsId);break;}}}});}}function removeSelectedGoodsIdToArray(rows){//var rows = $dg.datagrid('getSelections');if(rows.length>0){$.each(rows,function(i,row){if(idsArray.length > 0){for(var index=0;index<idsArray.length;index++){removeArrayValue(idsArray,row.goodsId);}}});}}function nextStep() {addSelectedGoodsIdToArray();console.log("ids length"+idsArray.length);if(idsArray.length>0){ids = '';for(var index=0;index<idsArray.length;index++){ids += idsArray[index];if(index != idsArray.length-1){ids += ',';}}}else{}parent.$.modalDialog({title : '商品排序',width : 1632,height : 830,href : "${pageContext.request.contextPath}/coupons/showAddStep3?goodsId="+ids,onLoad:function(){},buttons : [ {text : '下一步',iconCls : 'icon-ok',handler : function() {parent.$.modalDialog.openner= $grid;//因为添加成功之后，需要刷新这个dataGrid，所以先预定义好var f = parent.$.modalDialog.handler.find("#form");f.submit();}}, {text : '取消',iconCls : 'icon-cancel',handler : function() {parent.$.modalDialog.handler.dialog('destroy');parent.$.modalDialog.handler = undefined;}}]});}//编辑function editOneGood() {//console.log("run edit");var row = $dg.datagrid('getSelected');if (row) {window.location.href="${pageContext.request.contextPath}/goods/showEditGoods?goodsId="+row.goodsId;}else{parent.$.messager.show({title :"提示",msg :"请选择一行记录!",timeout : 1000 * 2});}}function addOneGood() {//console.log("run edit");window.location.href="${pageContext.request.contextPath}/goods/showAddGood";}//高级搜索 删除 rowfunction tbCompanySearchRemove(curr) {$(curr).closest('tr').remove();}//高级查询function tbsCompanySearch() {jqueryUtil.gradeSearch($dg,"#tbCompanySearchFm","jsp/company/companySearchDlg.jsp");}/*** 格式化日期（含时间）*/function formatterDate(date) {var datetime = date.getFullYear()+ "-"// "年"+ ((date.getMonth() + 1) >= 10 ? (date.getMonth() + 1) : "0"+ (date.getMonth() + 1))+ "-"// "月"+ (date.getDate() < 10 ? "0" + date.getDate() : date.getDate())+ " "+ (date.getHours() < 10 ? "0" + date.getHours() : date.getHours())+ ":"+ (date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes())+ ":"+ (date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds());return datetime;}function removeArrayValue(arr, val) {for(var i=0; i<arr.length; i++) {if(arr[i] == val) {arr.splice(i, 1);break;}}}</script></head><body><div data-options="region:'center',border : false"><div class="well well-small" style="margin-left: 5px;margin-top: 5px"><span class="badge">添加优惠券步骤</span><p>1：填写优惠券基本信息 ―――――――――― <span class="label-info"><strong>2：选择优惠券中的商品</strong></span> ―――――――――― 3：保存并生成优惠券</p></div><div id="tb" style="padding:2px 0"><table cellpadding="0" cellspacing="0"><tr><td style="padding-left:2px"><a href="javascript:void(0);" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="nextStep()">下一步</a><a href="javascript:void(0);" class="easyui-linkbutton" iconCls="icon-edit" plain="true" onclick="">取消</a></td><!-- <td style="padding-left:2px"><input id="searchbox" type="text"/></td> --><!-- <td style="padding-left:2px"><a href="javascript:void(0);" class="easyui-linkbutton" iconCls="icon-search" plain="true" onclick="tbsCompanySearch();">高级查询</a></td>--></tr></table></div><table id="dg" title="添加优惠券步骤2"></table></div> </body></html>

2、页面大概的样子

3、问题及解答，问题层层递进，每一个问题的前提是前一个问题已经解决。

已知：一个普通的datagrid表格。

问题1：如何实现翻页。

前台：pagination:true，表示显示分页toolbar。

后台：

@RequestMapping("/getGoodsOnSale")@ResponseBodypublic GridModel getGoodsOnSale(HttpServletRequest request, @RequestParam("page") Integer page,@RequestParam("rows") Integer rows) {Integer userRight = (Integer)(LoginController.getFromSession(request, ConstantsUtil.SESSION_USER_RIGHT));List<Goods> goods = new ArrayList<Goods>();Long total = new Long();if(userRight.equals(ConstantsUtil.USER_RIGHTS_ADMIN)){goods = goodsService.getGoodsOnSale(page, rows);total = goodsService.getGoodsOnSaleCount();}else{List<Brand> brands = (List<Brand>)(LoginController.getFromSession(request, ConstantsUtil.SESSION_USER_BRANDS));goods = goodsService.getGoodsOnSale(brands,page, rows);total = goodsService.getGoodsOnSaleCount(brands);}GridModel gridModel = getGoods(goods, request);gridModel.setTotal(total);return gridModel;}

说明：后台从request.getParameter里取两个参数，page和rows，分别代表当前的页数及每页显示几行数据。total是总数据数。

GridModel类：

public class GridModel {private List rows= new ArrayList();private Long total=0L;public List getRows() {return rows;}public void setRows(List rows) {this.rows = rows;}public Long getTotal() {return total;}public void setTotal(Long total) {this.total = total;}}

问题2：如何在datagrid表格里第一列显示checkbox，并且让行选中和checkbox选中等同?

答：

1、singleSelect：false，设置表格为复选模式

2、{field:'ck',checkbox:true}，这里面的checkbox:true表示该列显示复选按钮。

2、查看easyUI的文档：http://www.jeasyui.net/plugins/183.html可以得知两个属性――checkOnSelect和selectOnCheck。

checkOnSelect:如果设置为 true，当用户点击某一行时，则会选中/取消选中复选框。如果设置为 false 时，只有当用户点击了复选框时，才会选中/取消选中复选框。

selectOnCheck:如果设置为 true，点击复选框将会选中该行。如果设置为 false，选中该行将不会选中复选框。

所以，将这两个属性置为true。

问题3：如何在执行翻页以前将被选中的行的主键保存起来

答：此问题可分解为以下两个问题：

1、如何将勾选中的行保存起来

因为翻页是重新到后台取下一页数据，也就是数据重新加载的过程，所以可以考虑在onBeforeLoad时做相关处理。