ElementUI前端开发技巧整理笔记

SmileNicky

发布于 2021-06-29 10:51:53

6290

发布于 2021-06-29 10:51:53

文章被收录于专栏：Nicky's blogNicky's blog

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

<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);

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原始发表：2021-06-23 ，如有侵权请联系 cloudcommunity@tencent.com 删除

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