Element?UI中table單元格合并的解決過程
引言
項目中遇到表格單元格合并的需求,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并,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、格式化后臺返回的數(shù)據(jù)(根據(jù)實際數(shù)據(jù)格式處理)
項目后臺返回的數(shù)據(jù)格式為樹形結(jié)構(gòu),這里做簡化展示:
[
{
'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(jié)構(gòu)數(shù)據(jù)轉(zhuǎn)為一維數(shù)組:
// table 表格數(shù)據(jù)初始化處理,將樹結(jié)構(gòu)數(shù)據(jù)轉(zhuǎn)為一維數(shù)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
}因為后臺返回的數(shù)據(jù)里沒有唯一標識符,所以需要單獨添加一個唯一標識表示轉(zhuǎn)換為一維數(shù)組的數(shù)據(jù)是出自同一組樹結(jié)構(gòu)里。故此處在展開時單獨加了一個 id 屬性,用來代替唯一標識。如果后臺返回的數(shù)據(jù)格式就是一個一維數(shù)組,可跳過數(shù)據(jù)格式化步驟。
2、在 data 中定義數(shù)據(jù),需要合并幾列就定義幾個數(shù)組和索引
data() {
return {
tableData: [],
// 合并單元格
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、定義合并函數(shù)
以第一行為基準,一層層對比,參數(shù) data 就是格式化以后的表格數(shù)據(jù),以每個數(shù)據(jù)里的唯一標識 id 作為合并的參照字段:
// 初始化合并行數(shù)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
},
// 合并表格
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(dāng)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
}
}
}
}
},注意,同一組數(shù)據(jù)里可能會有多個 children1 或者 children2,這時合并的時候會有多個條件進行判斷:

4、table 組件屬性 span-method 的單元格合并方法:
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,整個單元格合并就完成了!
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: [],
// 合并單元格
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(shù)據(jù)
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(shù)據(jù)初始化處理,將樹結(jié)構(gòu)數(shù)據(jù)轉(zhuǎn)為一維數(shù)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
},
// 初始化合并行數(shù)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
},
// 合并表格
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(dāng)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(jié)
到此這篇關(guān)于Element UI中table單元格合并的文章就介紹到這了,更多相關(guān)Element UI table單元格合并內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家!
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