How to dynamically update and synchronize data through Vue and Excel

How to dynamically update and synchronize data through Vue and Excel

Foreword:
In daily work and life, we often need to process and manage large amounts of data. As a powerful spreadsheet software, Excel has become one of our most commonly used tools. However, the limitations of Excel are gradually revealed, such as insufficient real-time data updates and difficulty in collaborative editing. In order to solve these problems, we can achieve dynamic updating and synchronization of data by combining Vue and Excel. This article will introduce how to use Vue and Excel to implement this function, and provide corresponding code examples for your reference.

Step 1: Preparation
First, we need to prepare the required software and environment. We need to install the following tools:

1. Vue.js: a JavaScript framework for building user interfaces, mainly used to implement front-end logic.
2. Element-UI: A desktop UI framework based on Vue.js, which provides a series of components to facilitate page construction and design.
3. ExcelJS: A library for reading and writing Excel files in the browser, supporting Excel file operations in multiple formats.

Step 2: Create Vue project and Excel file
Next, we need to create a Vue project and add an Excel file in the project directory as the source file for data storage. You can create a Vue project through the following command:

vue create excel-demo   // 创建Vue项目
cd excel-demo   // 进入项目目录

Then, you can use Excel software to create an Excel file, save it as "data.xlsx", and place it in the "public" directory of the project.

Step 3: Install the required dependency packages
After entering the project directory, we need to install the two dependency packages ExcelJS and Element-UI. You can install it with the following command:

npm install exceljs element-ui --save   // 安装ExcelJS和Element-UI

Step 4: Write code
Next, we start writing code. First, create a folder named "components" in the "src" directory of the Vue project, and create a file named "Excel.vue" in the folder.

In the Excel.vue file, we need to do the following work:

1. Introduce the Element-UI component library and ExcelJS library:

   <script>
   import { Button, Table, TableColumn } from 'element-ui';
   import ExcelJS from 'exceljs';
   ...
   </script>

2. Define the required data in the data option of the component:

   data() {
     return {
    workbook: null,  // Excel工作薄对象
    worksheet: null,  // Excel工作表对象
    tableData: [],  // 表格数据
     }
   },

3. Write methods in the methods option of the component for opening and saving Excel files Operation:

   methods: {
     openExcelFile() {
    const reader = new FileReader();
   
    // 读取Excel文件
    reader.onload = (e) => {
      const data = new Uint8Array(e.target.result);
   
      this.workbook = new ExcelJS.Workbook();
      this.workbook.xlsx.load(data).then(this.loadExcelData);
    }
   
    // 弹出文件选择框
    const input = document.createElement('input');
    input.type = 'file';
    input.accept = '.xlsx';
   
    input.onchange = () => {
      const file = input.files[0];
      reader.readAsArrayBuffer(file);
    }
   
    input.click();
     },
     saveExcelFile() {
    const buffer = await this.workbook.xlsx.writeBuffer();
    const blob = new Blob([buffer], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
    const downloadLink = document.createElement('a');
    downloadLink.href = URL.createObjectURL(blob);
    downloadLink.download = 'data.xlsx';
    downloadLink.click();
     },
     loadExcelData() {
    this.worksheet = this.workbook.getWorksheet(1);
    const columns = this.worksheet.getRow(1).values;
    const rows = this.worksheet.getRows(2, this.worksheet.rowCount);
   
    this.tableData = rows.map(row => {
      const rowData = row.values;
      return rowData.reduce((obj, value, index) => {
        obj[columns[index]] = value;
        return obj;
      }, {});
    });
     },
     ...
   }

4. Write the code for page layout and table components in the component's template option:

   <template>
     <div>
    <el-button type="primary" @click="openExcelFile">打开Excel文件</el-button>
    <el-button type="success" @click="saveExcelFile">保存Excel文件</el-button>
    <el-table :data="tableData">
      <el-table-column v-for="(value, key) in tableData[0]" :key="key" :label="key" :prop="key"></el-table-column>
    </el-table>
     </div>
   </template>

5. Finally, you need to add the code in the component's script Export components in the tag:

   export default {
     components: {
    Button,
    Table,
    TableColumn,
     },
     ...
   }
   </script>

Step 5: Run the project
After completing the above steps, we can run the project. Execute the following command in the project directory:

npm run serve

Then, visit http://localhost:8080 in the browser, and you will see a page with functions for opening and saving Excel files. Click the "Open Excel File" button, select the Excel file prepared previously, and the data in the Excel file will be displayed on the page. We can modify and edit the data, and then click the "Save Excel File" button, and the data will be automatically synchronized to the Excel file.

Summary:
This article introduces how to dynamically update and synchronize data through Vue and Excel. By using Vue and the ExcelJS library, we can easily read and write Excel files, and display the data in the Excel file in our Vue page in real time. In this way, we can not only process and manage large amounts of data more quickly, but also easily collaborate with others to edit data, improving work efficiency and data accuracy. Hope this article is helpful to everyone!

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