element-ui implements import and export

This time I will bring you element-ui to implement import and export. What are the precautions for element-ui to implement import and export? The following is a practical case, let's take a look.

Preface

As we all know, ElementUI is a relatively complete UI library, but using it requires a bit of Vue foundation. Before starting the main text of this article, let's take a look at the installation method.

Install ElementUI module

cnpm install element-ui -S

Introduce

import ElementUI from 'element-ui'
import 'element-ui/lib/theme-default/index.css'

in main.js Global installation

Vue.use(ElementUI)

When we finish the installation, remember to run it again,

cnpm run dev , and now you can use elementUI directly.

vue element-ui import and export function

1. Data display in the front-end backend management system generally uses tables, which involve import and export;

2. The import is to use the Upload component of element-ui;

<el-upload>//是否支持cookie信息发送
</el-upload>

3. The export is to use an object blob of file; get the data by calling the background interface, then use the data to instantiate the blob, and use the href attribute of the a tag to link to the blob object

 export const downloadTemplate = function (scheduleType) {
  axios.get('/rest/schedule/template', {
   params: {
    "scheduleType": scheduleType
   },
   responseType: 'arraybuffer'
  }).then((response) => {
   //创建一个blob对象,file的一种
   let blob = new Blob([response.data], { type: 'application/x-xls' })
   let link = document.createElement('a')
   link.href = window.URL.createObjectURL(blob)
   //配置下载的文件名
   link.download = fileNames[scheduleType] + '_' + response.headers.datestr + '.xls'
   link.click()
  })
 }

4. Paste the complete code of the entire small demo, which can be used directly in the background development (vue file)

<template>
<p>
 <el-table>
 <el-table-column>
 </el-table-column>
 <el-table-column>
  <template>{{ scope.row.date }}</template>
 </el-table-column>
 <el-table-column>
 </el-table-column>
 <el-table-column>
 </el-table-column>
 </el-table>
 </p>
<p>
 <el-button>切换第二、第三行的选中状态</el-button>
 <el-button>取消选择</el-button>
 <el-button>导入</el-button>
 <el-button>导出</el-button>
 </p>
 <!-- 导入 -->
 <el-dialog>
  <p>
  <el-upload>
  <!-- 是否支持发送cookie信息 -->
   <el-button>{{uploadTip}}</el-button>
   <p>只能上传excel文件</p>
  </el-upload>
  </p>
<p>
   <a>
   <i></i>下载模板</a>
  </p>
  
  <p>
  </p>
<p>
   <i></i>导入失败</p>
  <p>
   </p>
<h4 id="失败原因">失败原因</h4>
   <ul>
   <li>第{{error.rowIdx + 1}}行，错误：{{error.column}},{{error.value}},{{error.errorInfo}}</li>
   </ul>
  
  
 </el-dialog>
 <!-- 导出 -->

</template>
<script>
import * as scheduleApi from &#39;@/api/schedule&#39;
export default {
 data() {
 return {
  tableData3: [
  {
   date: "2016-05-03",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-02",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-04",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-01",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-08",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-06",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  },
  {
   date: "2016-05-07",
   name: "王小虎",
   address: "上海市普陀区金沙江路 1518 弄"
  }
  ],
  multipleSelection: [],
  importUrl:&#39;www.baidu.com&#39;,//后台接口config.admin_url+&#39;rest/schedule/import/&#39;
  importHeaders:{
  enctype:&#39;multipart/form-data&#39;,
  cityCode:&#39;&#39;
  },
  name: &#39;import&#39;,
  fileList: [],
  withCredentials: true,
  processing: false,
  uploadTip:&#39;点击上传&#39;,
  importFlag:1,
  dialogImportVisible:false,
  errorResults:[]
 };
 },
 methods: {
 toggleSelection(rows) {
  if (rows) {
  rows.forEach(row => {
   this.$refs.multipleTable.toggleRowSelection(row);
  });
  } else {
  this.$refs.multipleTable.clearSelection();
  }
 },
 handleSelectionChange(val) {
  //复选框选择回填函数,val返回一整行的数据
  this.multipleSelection = val;
 },
 importData() {
  this.importFlag = 1
  this.fileList = []
  this.uploadTip = &#39;点击上传&#39;
  this.processing = false
  this.dialogImportVisible = true
 },
 outportData() {
  scheduleApi.downloadTemplate()
 },
 handlePreview(file) {
  //可以通过 file.response 拿到服务端返回数据
 },
 handleRemove(file, fileList) {
  //文件移除
 },
 beforeUpload(file){
  //上传前配置
  this.importHeaders.cityCode=&#39;上海&#39;//可以配置请求头
  let excelfileExtend = ".xls,.xlsx"//设置文件格式
  let fileExtend = file.name.substring(file.name.lastIndexOf(&#39;.&#39;)).toLowerCase();
  if (excelfileExtend.indexOf(fileExtend) <= -1) {
   this.$message.error(&#39;文件格式错误&#39;)
   return false
  }
  this.uploadTip = &#39;正在处理中...&#39;
  this.processing = true
 },
 //上传错误
 uploadFail(err, file, fileList) {
  this.uploadTip = &#39;点击上传&#39;
  this.processing = false
  this.$message.error(err)
 },
 //上传成功
 uploadSuccess(response, file, fileList) {
  this.uploadTip = &#39;点击上传&#39;
  this.processing = false
  if (response.status === -1) {
  this.errorResults = response.data
  if (this.errorResults) {
   this.importFlag = 2
  } else {
   this.dialogImportVisible = false
   this.$message.error(response.errorMsg)
  }
  } else {
  this.importFlag = 3
  this.dialogImportVisible = false
  this.$message.info(&#39;导入成功&#39;)
  this.doSearch()
  }
 },
 //下载模板
 download() {
  //调用后台模板方法,和导出类似
  scheduleApi.downloadTemplate()
 },
 }
};
</script>
<style>
.hide-dialog{
 display:none;
}
</style>

5.js file, calling interface

import axios from 'axios'
// 下载模板
 export const downloadTemplate = function (scheduleType) {
  axios.get('/rest/schedule/template', {
   params: {
    "scheduleType": scheduleType
   },
   responseType: 'arraybuffer'
  }).then((response) => {
   //创建一个blob对象,file的一种
   let blob = new Blob([response.data], { type: 'application/x-xls' })
   let link = document.createElement('a')
   link.href = window.URL.createObjectURL(blob)
   link.download = fileNames[scheduleType] + '_' + response.headers.datestr + '.xls'
   link.click()
  })
 }

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Recommended reading:

Angular verification function implementation steps

Detailed explanation of the steps to implement singleton mode in JS

The above is the detailed content of element-ui implements import and export. For more information, please follow other related articles on the PHP Chinese website!