Eement UI 中 Table 表格 多级合并单元格方式

Posted 2021-10-07 WHOVENLY

最近遇到一个需求，需要实现多级合并单元格，在此记录一下。

1.需求

需要得到如下所示的表格：

后端给的数据如下：

tableData6: [
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id1",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id2",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id3",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id4",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id5",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id1",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id2",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id3",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id4",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id5",
          projects_detail_name: "二级项目名称",
        },
      ],

2.概念

1.首先我们要知道的知识点：
Element为我们提供了一个合并行或列的计算方法:span-method，该方法接收4个参数Function({ row, column, rowIndex, columnIndex })

• row：当前行值,也就是tableData里的值
• column：当前列的值,也就是tableData里的值
• rowIndex：当前行的序号（从0开始）
• columnIndex：当前列的序号（从0开始）

该方法return一个对象{rowspan，colspan}

• rowspan：表示合并多少行
• colspan：表示合并多少列
• 如果是(0,0)表示不展示这条数据

2.接着来理清我们的思路
我们这个需求需要实现的是合并列，如果是从0开始的话，我们需要的是合并第0、1、2、4列，其实我们会发现其中第0列和第4列合并的单元格时一致的，第1和2列合并的单元格是一致的。

那怎么知道我们需要合并的列数呢？那就需要通过返回的数据对其进行判断了，由数据推理可得，当id值一致时，表示是同一个产品，当project_id或者是acceptance_id相同时表示是同一个一级项目和允收标准。

3.实现

废话不多说，直接上代码

<template>
  <div class="main-content">
    <div class="filter-box">
      <!-- 头部标题文件 -->
      <div class="filter-header">
        <div class="filter-header_title">
          {{menuStr.title}}
        </div>
        <el-button type="success" class="operate-btn" size="small" @click="formModalFun()" icon="el-icon-plus">新增</el-button>
      </div>
    </div>
    <div class="main-table">
      <!-- 尾部表格部分 -->
      <el-table :data="tableData" style="width: 100%" :span-method="objectSpanMethod" v-loading.body="listLoading" class-name="tables" border>
        <el-table-column prop="name" label="产品名称" align="center"></el-table-column>
        <el-table-column prop="project_name" label="一级项目" align="center"></el-table-column>
        <el-table-column prop="acceptance_name" label="允收标准" align="center"></el-table-column>
        <el-table-column prop="config_name" label="二级项目" align="center"></el-table-column>
        <el-table-column label="操作" width="160" align="center">
          <template slot-scope="scope">
            <el-tooltip class="item" effect="dark" content="编辑" placement="top">
              <el-button type="info" size="small" icon="el-icon-edit" :disabled="scope.row.disable_edit" @click="formModalFun(scope.row.id,scope.row)"></el-button>
            </el-tooltip>
            <el-tooltip class="item" effect="dark" content="复制配置" placement="top">
              <el-button type="info" size="small" icon="el-icon-copy-document" :disabled="scope.row.disable_edit" @click="copyConfigFun(scope.row.id,scope.row)"></el-button>
            </el-tooltip>
            <el-tooltip class="item" effect="dark" content="删除" placement="top">
              <el-button type="danger" size="small" icon="el-icon-delete" @click="deleteList(scope.row.id,scope.row.name)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      spanArr: [], //用于存放每一行记录的合并数
      spanArr2: [],
      pos2: 0,
      pos: 0,
      tableData: [
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id1",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id2",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id3",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id4",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "1",
          config_name: "配置名称",
          name: "商品名称1",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id5",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id1",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id2",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id1",
          project_name: "一级项目名称",
          acceptance_id: "1",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id3",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id4",
          projects_detail_name: "二级项目名称",
        },
        {
          id: "2",
          config_name: "配置名称",
          name: "商品名称2",
          config_id: "配置id",
          project_id: "一级项目id2",
          project_name: "一级项目名称",
          acceptance_id: "2",
          acceptance_name: "允收标准名称",
          projects_detail_id: "二级项目id5",
          projects_detail_name: "二级项目名称",
        },
      ],
    };
  },
  mounted: function () {
    tthis.getSpanArr(this.tableData);
  },
  methods: {
    getSpanArr(data) {
      for (var i = 0; i < data.length; i++) {
        if (i === 0) {
          // 初始化【产品名称】存放每一行记录的合并数数组
          this.spanArr.push(1);
          this.pos = 0;
          // 初始化【一级项目】存放每一行记录的合并数数组
          this.spanArr2.push(1);
          this.pos2 = 0;
        } else {
          // 【产品名称】
          if (data[i].id === data[i - 1].id) {
            // 若当前元素与上一个元素是否相同
            this.spanArr[this.pos] += 1;
            this.spanArr.push(0);
          } else {
            this.spanArr.push(1);
            this.pos = i;
          }
          // 【一级项目】
          if (data[i].acceptance_id === data[i - 1].acceptance_id) {
            // 若当前元素与上一个元素是否相同,则为数组添加0
            this.spanArr2[this.pos2] += 1;
            this.spanArr2.push(0);
          } else {
            this.spanArr2.push(1);
            this.pos2 = i;
          }
        }
      }
    },
    objectSpanMethod({ row, column, rowIndex, columnIndex }) {
      //【产品名称】和【操作】
      // 如果是第0列或者第4列
      if (columnIndex === 0 || columnIndex === 4) {
        const _row = this.spanArr[rowIndex];
        const _col = _row > 0 ? 1 : 0;
        console.log("columnIndex", `rowspan:${_row} colspan:${_col}`);
        return {
          rowspan: _row,
          colspan: _col,
        };
      }
      //【一级项目】和【二级项目】
      // 如果是第1列或者第2列
      if (columnIndex === 1 || columnIndex === 2) {
        const _row = this.spanArr2[rowIndex];
        const _col = _row > 0 ? 1 : 0;
        console.log("columnIndex", `rowspan:${_row} colspan:${_col}`);
        return {
          rowspan: _row,
          colspan: _col,
        };
      }
    },
    deleteList(id, name) {
    },
  },
};
</script>