Element ui 表格（Table）组件中前端实现数据分页和模糊查询

Posted 2022-06-23 明天也要努力

前端后台管理会存在很多表格,表格数据过多就需要分页，前端交互每次搜索如果都请求服务器会加大服务器的压力,所以在数据量不是很大的情况下可以一次性将数据返回,前端做检索。

1. 效果展示

2. 完整代码

<template>
  <div >
    <el-input 
      v-model="searchValue" size="mini" clearable
      placeholder="请输入编号或城市" style="width:300px"></el-input>
    <el-button type="primary" size="mini" @click="doFilter">搜索</el-button>
    <el-table :data="tableData" border >
      <el-table-column prop="number" label="编号" width="180" align="center"></el-table-column>
      <el-table-column prop="name" label="姓名" width="180" align="center"></el-table-column>
      <el-table-column prop="address" label="地址" width="180" align="center"></el-table-column>
    </el-table>
    <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="currentPage"
      :page-sizes="[1,4, 8]"
      :page-size="pageSize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="totalItems"
    ></el-pagination>
  </div>
</template>
    
<script>
export default 
  data() 
    return 
      resData: [
         number: "WH20160501",name: "王一虎",address: "武汉",
         number: "WH20160502",name: "王二虎",address: "武汉",
         number: "SH20160502",name: "王三虎",address: "上海",
         number: "SH20160503",name: "王四虎",address: "上海",
         number: "NJ20160503",name: "王五虎",address: "南京",
         number: "NJ20160504",name: "王六虎",address: "南京",
         number: "GZ20160505",name: "王七虎",address: "广州",
         number: "SZ20160505",name: "王八虎",address: "深圳",
      ],
      searchValue: "",
      tableData: [],
      currentPage: 1,
      pageSize: 8,
      totalItems: 0,
      filterTableData: [],
      flag: false,
    ;
  ,
  methods: 
    mockRequset()
      this.totalItems = this.resData.length; // 注意： 这里mock数据是写在data里的，请求需考虑异步的情况
      if (this.totalItems > this.pageSize) 
        for (let index = 0; index < this.pageSize; index++) 
          this.tableData.push(this.resData[index]);
        
       else 
        this.tableData = this.resData;
      
    ,
    // 前端搜索功能需要区分是否检索,因为对应的字段的索引不同
    doFilter() 
      this.tableData = [];
      this.filterTableData = [];
      this.resData.filter((item)=>
        if('number' in item || 'address' in item)
          // 按编号或地区查询 注意：根据实际数据 灵活调整字母大小写
          if (item.number.toUpperCase().indexOf(this.searchValue.toUpperCase()) > -1 
            || item.address.indexOf(this.searchValue) > -1) 
            this.filterTableData.push(item);
           
        
      )
      // 页面数据改变重新统计数据数量和当前页
      this.currentPage = 1;
      this.totalItems = this.filterTableData.length;
      // 渲染表格,根据值
      this.currentChangePage(this.filterTableData);
      // 页面初始化数据需要判断是否检索过
      this.flag = true;
    ,
    // 每页显示条数改变触发
    handleSizeChange(val) 
      console.log(`每页 $val 条`);
      this.pageSize = val;
      this.handleCurrentChange(1);
    ,
    // 当前页改变触发
    handleCurrentChange(val) 
      console.log(`当前页: $val`);
      this.currentPage = val;
      // 判断是否为搜索的数据,传入对应值
      if (!this.flag) 
        this.currentChangePage(this.resData);
       else 
        this.currentChangePage(this.filterTableData);
      
    , 
    // 根据分页，确定当前显示的数据
    currentChangePage(list) 
      let fromNum = (this.currentPage - 1) * this.pageSize;
      let toNum = this.currentPage * this.pageSize;
      this.tableData = [];
      for (; fromNum < toNum; fromNum++) 
        if (list[fromNum]) 
          this.tableData.push(list[fromNum]);
        
      
    ,
  ,
  beforeMount()
    this.mockRequset()
  
;
</script>