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html开发笔记20-合并单元格-列和行

、什么是合并单元格？

一个表格中分为 行 和 列 ，有时候你经常在网页中看到类似这样的表格，有时候是合并了列，有时候是合并了行。那么这个是怎么做的？也是通过下面的方法实现的。

二、怎么合并？

向单元格添加属性即可实现，合并 列 和 行的属性不一样

1、合并列的属性：clospan="2" //要合并几列数字就是几

2、合并行的属性：rowspan="2" //同理，要合并几行数字就是几

3、合并后的单元格（行或列）必然会自动多出来一个，需要手动删掉。

4、重点：合并单元格只和 td 标签有关系：

（1）合并列：是左右合并，在左侧的 td 标签中添加 colspan="2" 要合并的 td 的数量。

（2）合并行：是上下合并，在上面的 td 标签中添加 rowspan="2" 要合并的td的数量。

（3）合并完后删除多余的 td 标签。

三、两个属性的用法

1、合并 列 的用法：

（1）首先确定你要合并的单元格在第几行第几列，然后找到它，从他的td标签中添加属性。

例如要合并第4行的，第4和第5列：


<tr>
    <td>第三节</td>
    <td>html</td>
    <td>css</td>
    <td colspan="2">php</td> <!-- 合并 列 的用法-->
    <td>php</td>
  </tr>

2、合并 行 的用法：

例如下面：合并第3行和第4行的第1列。

完整代码：↓

<script src="https://lf6-cdn-tos.bytescm.com/obj/cdn-static-resource/tt_player/tt.player.js?v=20160723"></script>

td标签中合并单元格属性:

行合并： rowspan="2"

列合并：colspan="2"

考自下列文章

https://blog.csdn.net/u013558749/article/details/82257168 (element-ui 实现行合并)
https://www.cnblogs.com/guwufeiyang/p/12850088.html	(合并后样式的处理)

目标样式

合并后样式


来源数据

  • 获取到后台返回的数据再经过前端处理
  • 注意 [processId] [dimensionTag] 是参与合并的关键字段
[
    {
        "processId": "1499255834195238914",
        "currentProcessInfoId": "1499255834245570561",
        "flowType": "01",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "01",
        "dimensionName": "重点-测试",
        "dimensionTag": "1499255834195238914重点-测试",
        "nature": "01",
        "name": "1212",
        "statusRemark": "1212",
        "scoreStand": "1212",
        "source": "1212",
        "weight": 0.3,
        "status": "Y",
        "remark": "-",
        "index": 1,
        "rowIndex": 0
    },
    {
        "processId": "1499255834195238914",
        "currentProcessInfoId": "1499255834245570561",
        "flowType": "01",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "01",
        "dimensionName": "日常-测试",
        "dimensionTag": "1499255834195238914日常-测试",
        "nature": "01",
        "name": "TEST",
        "statusRemark": "100",
        "scoreStand": "100",
        "source": "100",
        "weight": 0.3,
        "status": "Y",
        "remark": "-",
        "index": 1,
        "rowIndex": 1
    },
    {
        "processId": "1499255834195238914",
        "currentProcessInfoId": "1499255834245570561",
        "flowType": "01",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "01",
        "dimensionName": "日常-测试",
        "dimensionTag": "1499255834195238914日常-测试",
        "nature": "01",
        "name": "12",
        "statusRemark": "12",
        "scoreStand": "12",
        "source": "12",
        "weight": 0.3,
        "status": "Y",
        "remark": "-",
        "index": 1,
        "rowIndex": 2
    },
    {
        "processId": "1499255834195238914",
        "currentProcessInfoId": "1499255834245570561",
        "flowType": "01",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "01",
        "dimensionName": "管理指标",
        "dimensionTag": "1499255834195238914管理指标",
        "nature": "02",
        "name": "12",
        "statusRemark": "12",
        "scoreStand": "12",
        "source": "12",
        "weight": 0.1,
        "status": "Y",
        "remark": "-",
        "index": 1,
        "rowIndex": 3
    },
    {
        "processId": "1499255834996350977",
        "currentProcessInfoId": null,
        "flowType": "02",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "00",
        "dimensionName": "重点-测试",
        "dimensionTag": "1499255834996350977重点-测试",
        "nature": "01",
        "name": "1212",
        "statusRemark": "1212",
        "scoreStand": "1212",
        "source": "1212",
        "weight": 0.3,
        "status": "-",
        "remark": "-",
        "index": 2,
        "rowIndex": 4
    },
    {
        "processId": "1499255834996350977",
        "currentProcessInfoId": null,
        "flowType": "02",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "00",
        "dimensionName": "日常-测试",
        "dimensionTag": "1499255834996350977日常-测试",
        "nature": "01",
        "name": "TEST",
        "statusRemark": "100",
        "scoreStand": "100",
        "source": "100",
        "weight": 0.3,
        "status": "-",
        "remark": "-",
        "index": 2,
        "rowIndex": 5
    },
    {
        "processId": "1499255834996350977",
        "currentProcessInfoId": null,
        "flowType": "02",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "00",
        "dimensionName": "日常-测试",
        "dimensionTag": "1499255834996350977日常-测试",
        "nature": "01",
        "name": "12",
        "statusRemark": "12",
        "scoreStand": "12",
        "source": "12",
        "weight": 0.3,
        "status": "-",
        "remark": "-",
        "index": 2,
        "rowIndex": 6
    },
    {
        "processId": "1499255834996350977",
        "currentProcessInfoId": null,
        "flowType": "02",
        "userName": "xxx",
        "itcode": "xxx",
        "pernr": "xxx",
        "approveStatus": "00",
        "dimensionName": "管理指标",
        "dimensionTag": "1499255834996350977管理指标",
        "nature": "02",
        "name": "12",
        "statusRemark": "12",
        "scoreStand": "12",
        "source": "12",
        "weight": 0.1,
        "status": "-",
        "remark": "-",
        "index": 2,
        "rowIndex": 7
    }
]

将数据按照字段[processId] [dimensionTag]进行处理

// 按照dimensionTag合并行
getDimensionNumber() {
  this.dimensionIndexArr = []
  let DimensionObj = {}
  this.dataList.forEach((element, index) => {
    element.rowIndex = index
    if (DimensionObj[element.dimensionTag]) {
      DimensionObj[element.dimensionTag].push(index)
    } else {
      DimensionObj[element.dimensionTag] = []
      DimensionObj[element.dimensionTag].push(index)
    }
  })
  for (let k in DimensionObj) {
    if (DimensionObj[k].length > 1) {
      this.dimensionIndexArr.push(DimensionObj[k])
    }
  }
},
// 按照processId合并行
getRecordNumber() {
  this.recordIndexArr=[]
  let OrderObj = {}
  this.dataList.forEach((element, index) => {
    element.rowIndex = index
    if (OrderObj[element.processId]) {
      OrderObj[element.processId].push(index)
    } else {
      OrderObj[element.processId] = []
      OrderObj[element.processId].push(index)
    }
  })
  for (let k in OrderObj) {
    if (OrderObj[k].length > 1) {
      this.recordIndexArr.push(OrderObj[k])
    }
  }
},

根据页面展示需要,控制哪一些列上的数据需要进行合并

objectSpanMethod({row, column, rowIndex, columnIndex}) {
  if (columnIndex === 0 || columnIndex === 1 || columnIndex >= 9) {
    for (let i = 0; i < this.recordIndexArr.length; i++) {
      let element = this.recordIndexArr[i]
      for (let j = 0; j < element.length; j++) {
        let item = element[j]
        if (rowIndex == item) {
          if (j == 0) {
            return {
              rowspan: element.length,
              colspan: 1
            }
          } else if (j != 0) {
            return {
              rowspan: 0,
              colspan: 0
            }
          }
        }
      }
    }
  }
  if (columnIndex === 2) {
    for (let i = 0; i < this.dimensionIndexArr.length; i++) {
      let element = this.dimensionIndexArr[i]
      for (let j = 0; j < element.length; j++) {
        let item = element[j]
        if (rowIndex == item) {
          if (j == 0) {
            return {
              rowspan: element.length,
              colspan: 1
            }
          } else if (j != 0) {
            return {
              rowspan: 0,
              colspan: 0
            }
          }
        }
      }
    }
  }
},

处理样式

  • 完成合并后会改变框架的样式,需要修复


样式错乱

  • 在el-table上添加 [row-class-name] [@cell-mouse-enter] [@cell-mouse-leave]并实现对应方法
<el-table
  ref="table"
  v-loading="dataListLoading"
  :data="dataList"
  border
  :span-method="objectSpanMethod"
  :row-class-name="tableRowClassName"
  @cell-mouse-enter="cellMouseEnter"
  @cell-mouse-leave="cellMouseLeave"
  style="width: 100%;margin-top: 16px"
>
    .......
</el-table>
tableRowClassName({row, rowIndex}) {
  let arr = this.hoverOrderArr
  for (let i = 0; i < arr.length; i++) {
    if (rowIndex === arr[i]) {
      return 'success-row'
    }
  }
},
cellMouseEnter(row, column, cell, event) {
  this.rowIndex = row.rowIndex
  this.hoverOrderArr = []
  this.recordIndexArr.forEach((element) => {
    if (element.indexOf(this.rowIndex) >= 0) {
      this.hoverOrderArr = element
    }
  })
},
cellMouseLeave(row, column, cell, event) {
  this.rowIndex = '-1'
  this.hoverOrderArr = []
},
<style scoped>
/deep/ .el-table .success-row {
  background: #ecf4fe;
}
</style>

完整代码


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