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
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