ElementUI前端开发技巧整理笔记,本博客不定时更新,整理工作中遇到的问题,整理成笔记
文章目录
- 1、实现页面加载效果
- 2、设置表格序号
- 3、实现表格分页效果
- 4、加载表格树形结构数据
- 5、设置表格只能单选效果
- 6、获取表格选择的行数据
- 7、按年月日维度选择日期
- 8、reset重置表单选项值
- 9、Element实现标签页切换
1、实现页面加载效果
<el-table
ref="Table"
:data="apprControlData"
:header-cell-style="headClass"
border
v-loading="loading" element-loading-text="数据加载中..."
@sort-change="onSortChange">
</el-table>
必须定义一个loading属性
var vm = new Vue({
el: '#app',
data:{
loading: false
// ...
}
});
一般在api接口调用时候设置就可以
// 加载办件信息
loadControlData () {
this.loading = true;
var pageSize = this.pageSize;
var currentPage = this.currentPage;
console.log("pageSize:"+pageSize+",currentPage:"+currentPage);
var geturl = '${root}/loadControlInfo.do?rows='+pageSize + '&page=' + currentPage + '&sort='+ sort + '&order=' + order;
$.ajax({
type: 'get',
url:geturl,
contentType: "application/json; charset=utf-8",
success: function(data) {
vm.apprControlData = data.rows;
vm.loading = false;
},
error: function(e) {
console.log("获取数据出现错误:",e);
}
})
}
2、设置表格序号
var vm = new Vue({
el: '#app',
data:{
currentPage: 1, //当前页
pageSize: 10, //当前显示条数
// ...
}
});
取分页的当前页和当前页数,计算序号
<el-table
ref="Table"
:data="apprControlData"
:header-cell-style="headClass"
border
v-loading="loading" element-loading-text="数据加载中..."
@sort-change="onSortChange">
<el-table-column
label="序号"
width="60"
align="center">
<template slot-scope="scope">{{(scope.$index+1)+(currentPage-1)*pageSize}}</template>
</el-table-column>
</el-table>
3、实现表格分页效果
<el-pagination>
加上@size-change="handleSizeChange、@current-change="handleCurrentChange"
处理当前页和当前页数的改变事件
<!--表格-->
<div class="formTable" id="formTable">
<el-table
ref="Table"
:data="apprItemData"
:header-cell-style="headClass"
row-key="approveItem"
:tree-props="{children: 'children'}"
height="420"
border>
<el-table-column
type="selection"
width="55">
</el-table-column>
<el-table-column
label="序号"
width="60"
align="center">
<template slot-scope="scope">{{scope.$index+1}}</template>
</el-table-column>
<el-table-column
prop="itemCode"
label="编码">
</el-table-column>
<el-table-column
prop="approveName"
label="事项名称">
</el-table-column>
</el-table>
</div>
<!--表格分页-->
<div class="pagination">
<el-pagination
background
@size-change="handleSizeChange"
@current-change="handleCurrentChange"
:page-sizes="[5,10, 15, 20, 25]"
:page-size="pageSize"
:current-page.sync="currentPage"
layout="total, sizes, prev, pager, next, jumper"
:total="totalRow">
</el-pagination>
</div>
<script type="text/babel">
var vm = new Vue({
el: '#app',
data:{
apprItemData : [],
currentPage: 1, //当前页
totalRow: 0, //总页数
pageSize: 10 //当前显示条数
},
computed: {},
watch: {},
created() {},
mounted() {
this.loadItemData();
},
methods: {
// 加载信息
loadItemData () {
var pageSize = this.pageSize;
var currentPage = this.currentPage;
console.log("pageSize:"+pageSize+",currentPage:"+currentPage);
//debugger;
var geturl = '${root}/config/loadItemData.do?rows='+pageSize + '&page=' + currentPage;
$.ajax({
type: 'get',
url:geturl,
contentType: "application/json; charset=utf-8",
success: function(data) {
//debugger;
console.log("totalRow:"+data.total);
vm.apprItemData = data.rows;
vm.totalRow = Number(data.total);
},
error: function(e) {
console.log("加载数据出现错误:",e);
}
})
}
// 表头样式设置
headClass() {
return 'text-align: center;background:#F7F7F7;color:#1C1C1D;'
},
//页数变换
handleSizeChange(val) {
this.pageSize = val;
this.loadItemData();
},
//当前页变换
handleCurrentChange(val) {
this.currentPage = val;
this.loadItemData();
}
}
});
</script>
4、加载表格树形结构数据
关键代码,在el-table
添加属性,:tree-props="{children: 'children'}"
,注意row必须命名为children
,官网也进行了说明:
支持树类型的数据的显示。当 row 中包含 children 字段时,被视为树形数据。渲染树形数据时,必须要指定 row-key。支持子节点数据异步加载。设置 Table 的 lazy 属性为 true 与加载函数 load 。通过指定 row 中的 hasChildren 字段来指定哪些行是包含子节点。children 与 hasChildren 都可以通过 tree-props 配置。
<el-table
ref="Table"
:data="apprItemData"
:header-cell-style="headClass"
@select="handleSelection"
row-key="approveItem"
height="420"
border
default-expand-all
:tree-props="{children: 'children'}">
<el-table-column
type="selection"
width="55">
</el-table-column>
<el-table-column
prop="itemCode"
label="事项编码">
</el-table-column>
<el-table-column
prop="approveName"
label="事项名称">
</el-table-column>
<el-table-column
prop="apprStatusStr"
label="配置的环节"
color="blue">
</el-table-column>
</el-table>
后台json数据:
{
"id":3,
"itemCode":"123",
"approveName":"测试事项",
"apprStatusStr":"环节名称",
"children":[
{
"id":31,
"itemCode":"111",
"approveName":"测试事项",
"apprStatusStr":"环节名称"
}
]
}
<script type="text/babel">
var vm = new Vue({
el: '#app',
data:{
apprItemData : [],
currentPage: 1, //当前页
totalRow: 0, //总页数
pageSize: 10 //当前显示条数
},
computed: {},
watch: {},
created() {},
mounted() {
this.loadItemData();
},
methods: {
// 加载事项信息
loadItemData () {
var pageSize = this.pageSize;
var currentPage = this.currentPage;
console.log("pageSize:"+pageSize+",currentPage:"+currentPage);
//debugger;
var geturl = '${root}/config/loadItemData.do?rows='+pageSize + '&page=' + currentPage;
$.ajax({
type: 'get',
url:geturl,
contentType: "application/json; charset=utf-8",
success: function(data) {
//debugger;
console.log("totalRow:"+data.total);
vm.apprItemData = data.rows;
},
error: function(e) {
console.log("更新数据出现错误:",e);
}
})
}
}
});
</script>
5、设置表格只能单选效果
设置样式隐藏表格上面总的选框
thead .el-table-column--selection .cell{
display: none;
}
table加上@selection-change="handleSelectionChange"
,ref设置个Table作为ref引用
<el-table
ref="Table"
:data="apprItemData"
:header-cell-style="headClass"
@selection-change="handleSelectionChange"
row-key="apprItem"
:tree-props="{children: 'children'}"
height="420"
border>
</el-table>
methods加上方法:
handleSelectionChange(val){
console.log("selection rows:"+val);
if (val.length > 1) {
this.$refs.Table.clearSelection()
this.$refs.Table.toggleRowSelection(val.pop())
}
}
6、获取表格选择的行数据
el-table
加上@select="handleSelection"
<el-table
ref="Table"
:data="apprItemData"
:header-cell-style="headClass"
@select="handleSelection"
row-key="approveItem"
:tree-props="{children: 'children'}"
height="420"
border>
</el-table>
// 选择表格行
handleSelection (selection, row) {
this.selectRows = row;
this.selectTotal = selection.length;
//console.log(row);
//console.log(selection.length);
}
然后在其它方法里,直接从this获取自己定义的vue对象拿就行
var rows = this.selectRows;
console.log("rows:"+rows);
var size = this.selectTotal;
console.log("size:" + size);
if (size < 1) {
top.dialog({title: '提示',content: "请选择至少一个选项!"}).show();
return;
}
var selItemName = rows.itemName;
对表格数据进行遍历:
let approveItems ="";
let itemArr = [];
this.$refs.Table.selection.forEach(e => {
itemArr.push(e.approveItem)
})
console.log("itemArr:" +itemArr);
approveItems = itemArr.toString();
console.log("approveItems:"+approveItems);
7、按年月日维度选择日期
这个有点难理解,那就按最近产品原型给的原型说明,产品将一个列表的日期选择设计成按年月日维度进行选择,首先选择按年维度,如图显示:
按月维度,显示当前的月份,当然也可以回退年份,选择后显示如2021-06
按日维度,也是最常用的,选择后显示格式为yyyy-MM-DD
刚接到需求,有点没思路,对于一个后台开发来说,稍微想了一会想到将<el-date-picker>
的type属性设置成动态的:type="dateType"
就可以
先做一个统计维度的下拉框:
<el-form-item size="small" prop="countSel" label="统计维度">
<el-select @change="countSelectChange" v-model="detailSearchForm.countSel" placeholder="请选择" :style="{width: '100px'}">
<el-option
v-for="item in countSelects"
:key="item.value"
:label="item.label"
:value="item.value">
</el-option>
</el-select>
</el-form-item>
var vm = new Vue({
el: '#app',
data:{
countSelects : [{
value: '1',
label: '按年'
}, {
value: '2',
label: '按月'
}, {
value: '3',
label: '按日'
}]
},
computed: {},
watch: {},
created() {},
mounted() {
},
methods: {
}
});
加两个日期选择控件,设置:type="dateType"
,dateType
是自己设置的值,value-format
加个动态参数valueFormat
<el-form-item size="small" label="统计时间" prop="countSTime">
<el-date-picker
v-model="detailSearchForm.countSTime"
:type="dateType"
:value-format="valueFormat"
placeholder="选择日期"
:style="{width: '180px'}">
</el-date-picker>
</el-form-item>
<el-form-item size="small" prop="countETime">
<el-date-picker
v-model="detailSearchForm.countETime"
:type="dateType"
:value-format="valueFormat"
placeholder="选择日期"
:style="{width: '180px'}">
</el-date-picker>
</el-form-item>
data加两个默认值:
dateType : 'date',
valueFormat: 'yyyy-MM-dd'
下拉选择框加@change函数countSelectChange
<el-select @change="countSelectChange" v-model="detailSearchForm.countSel" placeholder="请选择" :style="{width: '100px'}"></el-select>
// 统计维度变换
countSelectChange (val) {
console.log("统计维度:"+val);
if (val === '1') {
vm.dateType = 'year';
vm.valueFormat = 'yyyy';
} else if (val === '2') {
vm.dateType = 'month';
vm.valueFormat = 'yyyy-MM';
} else {
vm.dateType = 'date';
vm.valueFormat = 'yyyy-MM-dd';
}
}
8、reset重置表单选项值
<el-button @click="detailResetForm">重置</el-button>
form添加ref
<el-form :model="detailSearchForm" :inline="true" ref="detailSearchForm">
detailResetForm() {
this.$refs['detailSearchForm'].resetFields();
},
9、Element实现标签页切换
标签页在实际的应用中用的很多
直接引入el-tabs
<el-tabs v-model="activeName" @tab-click="handleClick">
<el-tab-pane label="汇总统计" name="first">
<el-tab-pane label="明细查询" name="second">
</el-tabs>
handleClick(tab, event) {
console.log(tab, event);
if(tab.name == 'second'){
this.loadEvaluateDetailList();
}else{
this.loadEvaluateCountData();
}
},
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