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el-table表格动态合并相同数据单元格(可指定列+自定义合并)

【字号: 日期:2022-06-12 14:16:14浏览:9作者:猪猪
目录1.固定合并2. 动态合并相同数据单元格(所有列)3. 动态合并相同数据单元格(指定列)4. 动态合并相同数据单元格(指定列+合并条件)完整代码1.固定合并官方挺提供的合并具体某行列的方法:el-table合并行或列通过给table传入span-method方法可以实现合并行或列,方法的参数是一个对象,里面包含当前行row、当前列column、当前行号rowIndex、当前列号columnIndex四个属性。

该函数可以返回一个包含两个元素的数组,第一个元素代表rowspan,第二个元素代表colspan。 也可以返回一个键名为rowspan和colspan的对象。

<template> <div> <el-table :data='tableData' :span-method='arraySpanMethod' border style='width: 100%'> <el-table-columnprop='id'label='ID'width='180'> </el-table-column> <el-table-columnprop='name'label='姓名'> </el-table-column> <el-table-columnprop='amount1'sortablelabel='数值 1'> </el-table-column> <el-table-columnprop='amount2'sortablelabel='数值 2'> </el-table-column> <el-table-columnprop='amount3'sortablelabel='数值 3'> </el-table-column> </el-table> <el-table :data='tableData' :span-method='objectSpanMethod' border style='width: 100%; margin-top: 20px'> <el-table-columnprop='id'label='ID'width='180'> </el-table-column> <el-table-columnprop='name'label='姓名'> </el-table-column> <el-table-columnprop='amount1'label='数值 1(元)'> </el-table-column> <el-table-columnprop='amount2'label='数值 2(元)'> </el-table-column> <el-table-columnprop='amount3'label='数值 3(元)'> </el-table-column> </el-table> </div></template><script> export default { data() { return {tableData: [{ id: '12987122', name: '王小虎', amount1: '234', amount2: '3.2', amount3: 10}, { id: '12987123', name: '王小虎', amount1: '165', amount2: '4.43', amount3: 12}, { id: '12987124', name: '王小虎', amount1: '324', amount2: '1.9', amount3: 9}, { id: '12987125', name: '王小虎', amount1: '621', amount2: '2.2', amount3: 17}, { id: '12987126', name: '王小虎', amount1: '539', amount2: '4.1', amount3: 15}] }; }, methods: { arraySpanMethod({ row, column, rowIndex, columnIndex }) {if (rowIndex % 2 === 0) { if (columnIndex === 0) { return [1, 2]; } else if (columnIndex === 1) { return [0, 0]; }} }, objectSpanMethod({ row, column, rowIndex, columnIndex }) {if (columnIndex === 0) { if (rowIndex % 2 === 0) { return { rowspan: 2, colspan: 1 }; } else { return { rowspan: 0, colspan: 0 }; }} } } };</script>

运行效果:

缺点:这种只适合写死的数据和固定的表格行列,无法动态判断单元格数据是否相等再合并;

2. 动态合并相同数据单元格(所有列)可以对所有相同数据的列,进行动态合并此方法适合需要合并所有的相同数据的单元格<template> <div> <el-table :data='tableData' :span-method='objectSpanMethod' border :header-cell-style='{ textAlign: 'center', backgroundColor: '#F5F7FA' }' > <el-table-column prop='School' label='学校' align='center'> </el-table-column> <el-table-column prop='Grade' label='年级' /> <el-table-column prop='Class' label='班级' /> <el-table-column prop='Name' label='姓名' /> <el-table-column prop='Chinese' label='语文' /> <el-table-column prop='Math' label='数学' /> <el-table-column prop='English' label='英语' /> </el-table> </div></template><script>export default { data() { return { // 存放所有的表头 一定要与tableData一致 colFields: ['School','Grade','Class','Name','Chinese','Math','English', ], spanArr: [], //存储合并单元格的开始位置 // 表格数据 tableData: [// 一年级{ School: '第一小学', Grade: '1年级', Class: '1班', Name: '张三', Chinese: '90', Math: '100', English: '80',},{ School: '第一小学', Grade: '1年级', Class: '2班', Name: '李四', Chinese: '90', Math: '85', English: '80',},{ School: '第一小学', Grade: '1年级', Class: '3班', Name: '王五', Chinese: '79', Math: '100', English: '80',},// 二年级{ School: '第一小学', Grade: '2年级', Class: '1班', Name: '赵六', Chinese: '95', Math: '100', English: '80',},{ School: '第一小学', Grade: '2年级', Class: '2班', Name: '钱八', Chinese: '98', Math: '85', English: '80',},{ School: '第一小学', Grade: '2年级', Class: '3班', Name: '陈九', Chinese: '79', Math: '100', English: '80',},// 三年级{ School: '第一小学', Grade: '3年级', Class: '1班', Name: '黄十', Chinese: '91', Math: '88', English: '80',},{ School: '第一小学', Grade: '3年级', Class: '2班', Name: '魏一', Chinese: '90', Math: '86', English: '87',},{ School: '第一小学', Grade: '3年级', Class: '3班', Name: '杨二', Chinese: '79', Math: '99', English: '80',}, ], }; }, methods: { /** * 分析每一列,找出相同的 * @param data */ getSpanArr() { for (let i = 0; i < this.tableData.length; i++) {let row = i;// let col = i % this.colCount;if (row === 0) { // i 表示行 j表示列 for (let j = 0; j < this.colFields.length; j++) { this.spanArr[i * this.colFields.length + j] = { rowspan: 1, colspan: 1, }; }} else { for (let j = 0; j < this.colFields.length; j++) { // 当前和上一次的一样 // 1. 合并所有列的相同数据单元格 if ( this.tableData[row][this.colFields[j]] === this.tableData[row - 1][this.colFields[j]] ) { let beforeItem =this.spanArr[(row - 1) * this.colFields.length + j]; this.spanArr[row * this.colFields.length + j] = {rowspan: 1 + beforeItem.rowspan, // 合并几行colspan: 1, // 合并几列,我这里只是跨行合并,不跨列合并,所以用的1 }; beforeItem.rowspan = 0; beforeItem.colspan = 0; } else { // rowspan 和 colspan 都为1表格此单元格不合并 this.spanArr[row * this.colFields.length + j] = {rowspan: 1,colspan: 1, }; } }} } // 对数据进行倒序 let stack = []; for (let i = 0; i < this.colFields.length; i++) {for (let j = 0; j < this.tableData.length; j++) { // console.log('i=' + i + ' j=' + j); // i 表示列 j表示行 if (j === 0) { if (this.spanArr[j * this.colFields.length + i].rowspan === 0) { stack.push(this.spanArr[j * this.colFields.length + i]); } } else { if (this.spanArr[j * this.colFields.length + i].rowspan === 0) { stack.push(this.spanArr[j * this.colFields.length + i]); } else { stack.push(this.spanArr[j * this.colFields.length + i]); while (stack.length > 0) {let pop = stack.pop();let len = stack.length;this.spanArr[(j - len) * this.colFields.length + i] = pop; } } }} } // console.log(this.spanArr); }, objectSpanMethod({ row, column, rowIndex, columnIndex }) { // console.log(this.spanArr[rowIndex * this.colFields.length + columnIndex]); return this.spanArr[rowIndex * this.colFields.length + columnIndex]; }, }, mounted() { this.getSpanArr(); },};</script><style lang='scss' scoped></style>

效果:

我们可以看到,所有列,只要数据相同的单元格都被合并了,包括我不想合并的单元格,这时候就要指定合并的列了

3. 动态合并相同数据单元格(指定列)

只需要加个if判断即可指定要合并哪些列

// 这里只放了部分代码,除了加了个if,其他代码和上面的一样 getSpanArr() { for (let i = 0; i < this.tableData.length; i++) {let row = i;// let col = i % this.colCount;if (row === 0) { // i 表示行 j表示列 for (let j = 0; j < this.colFields.length; j++) { this.spanArr[i * this.colFields.length + j] = { rowspan: 1, colspan: 1, }; }} else { for (let j = 0; j < this.colFields.length; j++) { // 当前和上一次的一样 // 合并所有列的相同数据单元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 if (this.tableData[row][this.colFields[j]] ===this.tableData[row - 1][this.colFields[j]] ) {let beforeItem = this.spanArr[(row - 1) * this.colFields.length + j];this.spanArr[row * this.colFields.length + j] = { rowspan: 1 + beforeItem.rowspan, colspan: 1,};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都为1表格此单元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} }

效果:这样就只合并了我们指定的那几列了

4. 动态合并相同数据单元格(指定列+合并条件)

有时候我们会遇到不想合并的单元格,比如下面这种情况:

按常理来说,不同小学的数据应该是不做合并才对,正确是这种:

这时候就需要加上一些自定义的合并条件了:

getSpanArr() { for (let i = 0; i < this.tableData.length; i++) {let row = i;// let col = i % this.colCount;if (row === 0) { // i 表示行 j表示列 for (let j = 0; j < this.colFields.length; j++) { this.spanArr[i * this.colFields.length + j] = { rowspan: 1, colspan: 1, }; }} else { for (let j = 0; j < this.colFields.length; j++) { // 当前和上一次的一样 // 合并所有列的相同数据单元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 if (this.tableData[row]['School'] !== this.tableData[row - 1]['School'] ) { // 哪些不合并:School不一样的,不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } else if (this.tableData[row][this.colFields[j]] ===this.tableData[row - 1][this.colFields[j]] ) {let beforeItem = this.spanArr[(row - 1) * this.colFields.length + j];this.spanArr[row * this.colFields.length + j] = { rowspan: 1 + beforeItem.rowspan,// 合并几列 colspan: 1,// 合并几行};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都为1表格此单元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} } // console.log(this.spanArr); },

这时候再看,就是我们想要的效果了

完整代码

最后附完整代码:

<template> <div> <el-table :data='tableData' :span-method='objectSpanMethod' border :header-cell-style='{ textAlign: 'center', backgroundColor: '#F5F7FA' }' > <el-table-column prop='School' label='学校' align='center'> </el-table-column> <el-table-column prop='Grade' label='年级' /> <el-table-column prop='Class' label='班级' /> <el-table-column prop='Name' label='姓名' /> <el-table-column prop='Chinese' label='语文' /> <el-table-column prop='Math' label='数学' /> <el-table-column prop='English' label='英语' /> </el-table> </div></template><script>export default { data() { return { // 存放所有的表头 一定要与tableData一致 colFields: ['School','Grade','Class','Name','Chinese','Math','English', ], spanArr: [], //存储合并单元格的开始位置 // 表格数据 tableData: [// 一年级{ School: '第一小学', Grade: '1年级', Class: '1班', Name: '张三', Chinese: '90', Math: '100', English: '80',},{ School: '第一小学', Grade: '1年级', Class: '1班', Name: '张伟', Chinese: '90', Math: '99', English: '89',},{ School: '第一小学', Grade: '1年级', Class: '2班', Name: '李四', Chinese: '90', Math: '85', English: '80',},{ School: '第一小学', Grade: '1年级', Class: '3班', Name: '王五', Chinese: '79', Math: '100', English: '80',},// 二年级{ School: '第一小学', Grade: '2年级', Class: '1班', Name: '赵六', Chinese: '95', Math: '100', English: '80',},{ School: '第一小学', Grade: '2年级', Class: '2班', Name: '钱八', Chinese: '98', Math: '85', English: '80',},{ School: '第一小学', Grade: '2年级', Class: '3班', Name: '陈九', Chinese: '79', Math: '100', English: '100',},// 三年级{ School: '第一小学', Grade: '3年级', Class: '1班', Name: '黄十', Chinese: '91', Math: '88', English: '80',},{ School: '第一小学', Grade: '3年级', Class: '2班', Name: '魏一', Chinese: '90', Math: '86', English: '87',},{ School: '第一小学', Grade: '3年级', Class: '3班', Name: '杨二', Chinese: '79', Math: '99', English: '80',},// 第二小学{ School: '第二小学', Grade: '3年级', Class: '3班', Name: '袁零', Chinese: '79', Math: '99', English: '80',}, ], }; }, methods: { /** * 分析每一列,找出相同的 * @param data */ getSpanArr() { for (let i = 0; i < this.tableData.length; i++) {let row = i;// let col = i % this.colCount;if (row === 0) { // i 表示行 j表示列 for (let j = 0; j < this.colFields.length; j++) { this.spanArr[i * this.colFields.length + j] = { rowspan: 1, colspan: 1, }; }} else { for (let j = 0; j < this.colFields.length; j++) { // 当前和上一次的一样 // 合并所有列的相同数据单元格 if ( this.colFields[j] == 'School' || this.colFields[j] == 'Grade' || this.colFields[j] == 'Class' ) { // 指定合并哪些列 if (this.tableData[row]['School'] !== this.tableData[row - 1]['School'] ) { // 哪些不合并:School不一样的,不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } else if (this.tableData[row][this.colFields[j]] ===this.tableData[row - 1][this.colFields[j]] ) {let beforeItem = this.spanArr[(row - 1) * this.colFields.length + j];this.spanArr[row * this.colFields.length + j] = { rowspan: 1 + beforeItem.rowspan,// 合并几列 colspan: 1,// 合并几行};beforeItem.rowspan = 0;beforeItem.colspan = 0; } else {// rowspan 和 colspan 都为1表格此单元格不合并this.spanArr[row * this.colFields.length + j] = { rowspan: 1, colspan: 1,}; } } }} } // 对数据进行倒序 let stack = []; for (let i = 0; i < this.colFields.length; i++) {for (let j = 0; j < this.tableData.length; j++) { // console.log('i=' + i + ' j=' + j); // i 表示列 j表示行 if (j === 0) { if (this.spanArr[j * this.colFields.length + i].rowspan === 0) { stack.push(this.spanArr[j * this.colFields.length + i]); } } else { if (this.spanArr[j * this.colFields.length + i].rowspan === 0) { stack.push(this.spanArr[j * this.colFields.length + i]); } else { stack.push(this.spanArr[j * this.colFields.length + i]); while (stack.length > 0) {let pop = stack.pop();let len = stack.length;this.spanArr[(j - len) * this.colFields.length + i] = pop; } } }} } // console.log(this.spanArr); }, objectSpanMethod({ row, column, rowIndex, columnIndex }) { // console.log(this.spanArr[rowIndex * this.colFields.length + columnIndex]); return this.spanArr[rowIndex * this.colFields.length + columnIndex]; }, }, mounted() { this.getSpanArr(); },};</script><style lang='scss' scoped></style>

参考:https://blog.csdn.net/u010735120/article/details/122184493

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