Element UI中table單元格合並的解決過程

引言

項目中遇到表格單元格合並的需求,在此記錄整個解決過程。

項目使用的是 Element UI,表格使用的是 table 組件。Element UI 的 table 表格組件中對單元格進行合並,需要使用 table 組件的 span-method 屬性。

先看一張成果圖(完整代碼放在末尾):

解決思路:

1、格式化後臺返回的數據(根據實際數據格式處理)

項目後臺返回的數據格式為樹形結構,這裡做簡化展示:

[
  {
    'column1': '111',
    'column2': '222',
    'column3': '333',
    'children1': [
      {
        'column6': 666,
        'column4': '4440',
        'column5': '5550',
        'children2': [
          {
            'column7': '77701',
            'column8': '88801',
            'column9': '99901'
          }
        ]
      }
    ]
  }
]

需要先將樹結構數據轉為一維數組:

// table 表格數據初始化處理,將樹結構數據轉為一維數組
    handleData(data, parentId) {
      data.map((res, index) => {
        var obj = {
          id: parentId
        }
        for (const key in res) {
          const isarr = Object.values(res).find((age) => {
            return Array.isArray(age)
          })
          if (isarr) {
            if (Array.isArray(res[key])) {
              for (let i = 0; i < res[key].length; i++) {
                Object.assign(obj, res[key][i])
                data.push(obj)
                res[key].splice(i, 1)
                if (res[key].length === 0) {
                  data.splice(index, 1)
                }
                this.handleData(data, parentId)
              }
            } else {
              Object.assign(obj, { [key]: res[key] })
            }
          }
        }
      })
      return data
    }

因為後臺返回的數據裡沒有唯一標識符,所以需要單獨添加一個唯一標識表示轉換為一維數組的數據是出自同一組樹結構裡。故此處在展開時單獨加瞭一個 id 屬性,用來代替唯一標識。如果後臺返回的數據格式就是一個一維數組,可跳過數據格式化步驟。

2、在 data 中定義數據,需要合並幾列就定義幾個數組和索引

  data() {
    return {
      tableData: [],
      // 合並單元格
      column1Arr: [], // column1
      column1Index: 0, // column1索引
      column2Arr: [], // column2
      column2Index: 0, // column2索引
      column3Arr: [], // column3
      column3Index: 0, // column3索引
      column4Arr: [], // column4
      column4Index: 0, // column4
      column5Arr: [], // column5
      column5Index: 0, // column5索引
      column6Arr: [], // column6
      column6Index: 0 // column6索引
    }
  }

3、定義合並函數

以第一行為基準,一層層對比,參數 data 就是格式化以後的表格數據,以每個數據裡的唯一標識 id 作為合並的參照字段:

    // 初始化合並行數組
    mergeInit() {
      this.column1Arr = [] // column1
      this.column1Index = 0 // column1索引
      this.column2Arr = [] // column2
      this.column2Index = 0 // column2索引
      this.column3Arr = [] // column3
      this.column3Index = 0 // column3索引
      this.column4Arr = [] // column4
      this.column4Index = 0 // column4索引
      this.column5Arr = [] // column5
      this.column5Index = 0 // column5索引
      this.column6Arr = [] // column6
      this.column6Index = 0 // column6索引
    },
    // 合並表格
    mergeTable(data) {
      this.mergeInit()
      if (data.length > 0) {
        for (var i = 0; i < data.length; i++) {
          if (i === 0) {
            // 第一行必須存在,以第一行為基準
            this.column1Arr.push(1) // column1
            this.column1Index = 0
 
            this.column2Arr.push(1) // column2
            this.column2Index = 0
 
            this.column3Arr.push(1) // column3
            this.column3Index = 0
 
            this.column4Arr.push(1) // column4
            this.column4Index = 0
 
            this.column5Arr.push(1) // column5
            this.column5Index = 0
 
            this.column6Arr.push(1) // column6
            this.column6Index = 0
          } else {
            // 判斷當前元素與上一元素是否相同
            // column1
            if (
              data[i].column1 === data[i - 1].column1 &&
              data[i].id === data[i - 1].id
            ) {
              this.column1Arr[this.column1Index] += 1
              this.column1Arr.push(0)
            } else {
              this.column1Arr.push(1)
              this.column1Index = i
            }
 
            // column2
            if (
              data[i].column2 === data[i - 1].column2 &&
              data[i].id === data[i - 1].id
            ) {
              this.column2Arr[this.column2Index] += 1
              this.column2Arr.push(0)
            } else {
              this.column2Arr.push(1)
              this.column2Index = i
            }
 
            // column3
            if (
              data[i].column3 === data[i - 1].column3 &&
              data[i].id === data[i - 1].id
            ) {
              this.column3Arr[this.column3Index] += 1
              this.column3Arr.push(0)
            } else {
              this.column3Arr.push(1)
              this.column3Index = i
            }
 
            // column4
            if (
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column4Arr[this.column4Index] += 1
              this.column4Arr.push(0)
            } else {
              this.column4Arr.push(1)
              this.column4Index = i
            }
 
            // column5
            if (
              data[i].column5 === data[i - 1].column5 &&
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column5Arr[this.column5Index] += 1
              this.column5Arr.push(0)
            } else {
              this.column5Arr.push(1)
              this.column5Index = i
            }
 
            // column6
            if (
              data[i].column6 === data[i - 1].column6 &&
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column6Arr[this.column6Index] += 1
              this.column6Arr.push(0)
            } else {
              this.column6Arr.push(1)
              this.column6Index = i
            }
          }
        }
      }
    },

註意,同一組數據裡可能會有多個  children1 或者 children2,這時合並的時候會有多個條件進行判斷:

4、table 組件屬性 span-method 的單元格合並方法:

    handleSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0 || columnIndex === 1) {
        // 第一列 column1
        const _row_1 = this.column1Arr[rowIndex]
        const _col_1 = _row_1 > 0 ? 1 : 0
        return {
          rowspan: _row_1,
          colspan: _col_1
        }
      } else if (columnIndex === 2) {
        // 第二列 column2
        const _row_2 = this.column2Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 3) {
        // 第三列 column3
        const _row_2 = this.column3Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 4) {
        // 第四列 column4
        const _row_2 = this.column4Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 5) {
        // 第五列 column5
        const _row_2 = this.column5Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 6) {
        // 第六列 column6
        const _row_2 = this.column6Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      }
    }

至此,整個單元格合並就完成瞭!

如果覺得寫得還不錯,還請點贊支持,感謝感謝感謝!!!

完整代碼:

<template>
  <div class="table-wrap">
    <el-table
      :data="tableData"
      :span-method="handleSpanMethod"
      :cell-style="{ background: '#FFFFFF' }"
      border
      style="width: 100%"
    >
      <el-table-column prop="id" label="序號" align="center" width="80">
        <template slot-scope="scope">
          {{ scope.row.id + 1 }}
        </template>
      </el-table-column>
      <el-table-column prop="column1" label="column1" align="center" />
      <el-table-column prop="column2" label="column2" align="center" />
      <el-table-column prop="column3" label="column3" align="center" />
      <el-table-column prop="column4" label="column4" align="center" />
      <el-table-column prop="column5" label="column5" align="center" />
      <el-table-column prop="column6" label="column6" align="center" />
      <el-table-column prop="column7" label="column7" align="center" />
      <el-table-column prop="column8" label="column8" align="center" />
      <el-table-column prop="column9" label="column9" align="center" />
    </el-table>
  </div>
</template>
 
<script>
export default {
  name: 'CellMerge',
  data() {
    return {
      tableData: [],
      // 合並單元格
      column1Arr: [], // column1
      column1Index: 0, // column1索引
      column2Arr: [], // column2
      column2Index: 0, // column2索引
      column3Arr: [], // column3
      column3Index: 0, // column3索引
      column4Arr: [], // column4
      column4Index: 0, // column4
      column5Arr: [], // column5
      column5Index: 0, // column5索引
      column6Arr: [], // column6
      column6Index: 0 // column6索引
    }
  },
  mounted() {
    this.initTableData()
  },
  methods: {
    // 初始化表格數據
    initTableData() {
      const newTableData = [
        {
          'column1': '111',
          'column2': '222',
          'column3': '333',
          'children1': [
            {
              'column6': 666,
              'column4': '4440',
              'column5': '5550',
              'children2': [
                {
                  'column7': '77701',
                  'column8': '88801',
                  'column9': '99901'
                },
                {
                  'column7': '77702',
                  'column8': '88802',
                  'column9': '99902'
                },
                {
                  'column7': '77703',
                  'column8': '88803',
                  'column9': '99903'
                }
              ]
            },
            {
              'column6': 666,
              'column4': '4441',
              'column5': '5551',
              'children2': [
                {
                  'column7': '77711',
                  'column8': '88811',
                  'column9': '99911'
                }
              ]
            },
            {
              'column6': 666,
              'column4': '4442',
              'column5': '5552',
              'children2': [
                {
                  'column7': '77721',
                  'column8': '88821',
                  'column9': '99921'
                },
                {
                  'column7': '77722',
                  'column8': '88822',
                  'column9': '99922'
                }
              ]
            }
          ]
        },
        {
          'column1': '111',
          'column2': '222',
          'column3': '333',
          'children1': [
            {
              'column6': 666,
              'column4': '4440',
              'column5': '5550',
              'children2': [
                {
                  'column7': '77701',
                  'column8': '88801',
                  'column9': '99901'
                }
              ]
            },
            {
              'column6': 666,
              'column4': '4441',
              'column5': '5551',
              'children2': [
                {
                  'column7': '77711',
                  'column8': '88811',
                  'column9': '99911'
                },
                {
                  'column7': '77712',
                  'column8': '88812',
                  'column9': '99912'
                }
              ]
            }
          ]
        },
        {
          'column1': '111',
          'column2': '222',
          'column3': '333',
          'children1': [
            {
              'column6': 666,
              'column4': '4440',
              'column5': '5550',
              'children2': [
                {
                  'column7': '77701',
                  'column8': '88801',
                  'column9': '99901'
                },
                {
                  'column7': '77702',
                  'column8': '88802',
                  'column9': '99902'
                },
                {
                  'column7': '77703',
                  'column8': '88803',
                  'column9': '99903'
                }
              ]
            },
            {
              'column6': 666,
              'column4': '4441',
              'column5': '5551',
              'children2': [
                {
                  'column7': '77711',
                  'column8': '88811',
                  'column9': '99911'
                }
              ]
            }
          ]
        }
      ]
      this.tableData = []
      newTableData.map((res, index) => {
        const parentId = index
        this.tableData.push.apply(
          this.tableData,
          this.handleData([res], parentId)
        )
      })
      this.mergeTable(this.tableData)
    },
    // table 表格數據初始化處理,將樹結構數據轉為一維數組
    handleData(data, parentId) {
      data.map((res, index) => {
        var obj = {
          id: parentId
        }
        for (const key in res) {
          const isarr = Object.values(res).find((age) => {
            return Array.isArray(age)
          })
          if (isarr) {
            if (Array.isArray(res[key])) {
              for (let i = 0; i < res[key].length; i++) {
                Object.assign(obj, res[key][i])
                data.push(obj)
                res[key].splice(i, 1)
                if (res[key].length === 0) {
                  data.splice(index, 1)
                }
                this.handleData(data, parentId)
              }
            } else {
              Object.assign(obj, { [key]: res[key] })
            }
          }
        }
      })
      return data
    },
    // 初始化合並行數組
    mergeInit() {
      this.column1Arr = [] // column1
      this.column1Index = 0 // column1索引
      this.column2Arr = [] // column2
      this.column2Index = 0 // column2索引
      this.column3Arr = [] // column3
      this.column3Index = 0 // column3索引
      this.column4Arr = [] // column4
      this.column4Index = 0 // column4索引
      this.column5Arr = [] // column5
      this.column5Index = 0 // column5索引
      this.column6Arr = [] // column6
      this.column6Index = 0 // column6索引
    },
    // 合並表格
    mergeTable(data) {
      this.mergeInit()
      if (data.length > 0) {
        for (var i = 0; i < data.length; i++) {
          if (i === 0) {
            // 第一行必須存在,以第一行為基準
            this.column1Arr.push(1) // column1
            this.column1Index = 0
 
            this.column2Arr.push(1) // column2
            this.column2Index = 0
 
            this.column3Arr.push(1) // column3
            this.column3Index = 0
 
            this.column4Arr.push(1) // column4
            this.column4Index = 0
 
            this.column5Arr.push(1) // column5
            this.column5Index = 0
 
            this.column6Arr.push(1) // column6
            this.column6Index = 0
          } else {
            // 判斷當前元素與上一元素是否相同
            // column1
            if (
              data[i].column1 === data[i - 1].column1 &&
              data[i].id === data[i - 1].id
            ) {
              this.column1Arr[this.column1Index] += 1
              this.column1Arr.push(0)
            } else {
              this.column1Arr.push(1)
              this.column1Index = i
            }
 
            // column2
            if (
              data[i].column2 === data[i - 1].column2 &&
              data[i].id === data[i - 1].id
            ) {
              this.column2Arr[this.column2Index] += 1
              this.column2Arr.push(0)
            } else {
              this.column2Arr.push(1)
              this.column2Index = i
            }
 
            // column3
            if (
              data[i].column3 === data[i - 1].column3 &&
              data[i].id === data[i - 1].id
            ) {
              this.column3Arr[this.column3Index] += 1
              this.column3Arr.push(0)
            } else {
              this.column3Arr.push(1)
              this.column3Index = i
            }
 
            // column4
            if (
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column4Arr[this.column4Index] += 1
              this.column4Arr.push(0)
            } else {
              this.column4Arr.push(1)
              this.column4Index = i
            }
 
            // column5
            if (
              data[i].column5 === data[i - 1].column5 &&
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column5Arr[this.column5Index] += 1
              this.column5Arr.push(0)
            } else {
              this.column5Arr.push(1)
              this.column5Index = i
            }
 
            // column6
            if (
              data[i].column6 === data[i - 1].column6 &&
              data[i].column4 === data[i - 1].column4 &&
              data[i].id === data[i - 1].id
            ) {
              this.column6Arr[this.column6Index] += 1
              this.column6Arr.push(0)
            } else {
              this.column6Arr.push(1)
              this.column6Index = i
            }
          }
        }
      }
    },
    handleSpanMethod({ row, column, rowIndex, columnIndex }) {
      if (columnIndex === 0 || columnIndex === 1) {
        // 第一列 column1
        const _row_1 = this.column1Arr[rowIndex]
        const _col_1 = _row_1 > 0 ? 1 : 0
        return {
          rowspan: _row_1,
          colspan: _col_1
        }
      } else if (columnIndex === 2) {
        // 第二列 column2
        const _row_2 = this.column2Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 3) {
        // 第三列 column3
        const _row_2 = this.column3Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 4) {
        // 第四列 column4
        const _row_2 = this.column4Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 5) {
        // 第五列 column5
        const _row_2 = this.column5Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      } else if (columnIndex === 6) {
        // 第六列 column6
        const _row_2 = this.column6Arr[rowIndex]
        const _col_2 = _row_2 > 0 ? 1 : 0
        return {
          rowspan: _row_2,
          colspan: _col_2
        }
      }
    }
  }
}
</script>
<style lang="scss" scoped>
  .table-wrap {
    width: 100%;
    height: 100%;
    padding: 20px;
  }
</style>

總結

到此這篇關於Element UI中table單元格合並的文章就介紹到這瞭,更多相關Element UI table單元格合並內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!

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