Element-UI is a desktop UI framework based on Vue.js 2.0 launched by the Ele.me front-end team. The corresponding framework for mobile phones is Mint UI. The following article mainly introduces you to the use of vue element- Friends who need information on how to implement concise import and export functions in UI can refer to it.
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 into main.js
import ElementUI from 'element-ui' import 'element-ui/lib/theme-default/index.css'
Global installation
Vue.use(ElementUI)
Remember to reinstall when we finish the installation Run, cnpm run dev , 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, and the tables will involve Import and export;
2. Import is using the Upload upload component of element-ui;
<el-upload class="upload-demo" :action="importUrl"//上传的路径 :name ="name"//上传的文件字段名 :headers="importHeaders"//请求头格式 :on-preview="handlePreview"//可以通过 file.response 拿到服务端返回数据 :on-remove="handleRemove"//文件移除 :before-upload="beforeUpload"//上传前配置 :on-error="uploadFail"//上传错误 :on-success="uploadSuccess"//上传成功 :file-list="fileList"//上传的文件列表 :with-credentials="withCredentials">//是否支持cookie信息发送 </el-upload>
3. Export is using an object blob of file; get the data by calling the background interface, and then Use 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
ref="multipleTable"
:data="tableData3"
tooltip-effect="dark"
border
style="width: 80%"
@selection-change="handleSelectionChange">
<el-table-column
type="selection"
width="55">
</el-table-column>
<el-table-column
label="日期"
width="120">
<template slot-scope="scope">{{ scope.row.date }}</template>
</el-table-column>
<el-table-column
prop="name"
label="姓名"
width="120">
</el-table-column>
<el-table-column
prop="address"
label="地址"
show-overflow-tooltip>
</el-table-column>
</el-table>
<p style="margin-top: 20px">
<el-button @click="toggleSelection([tableData3[1], tableData3[2]])">切换第二、第三行的选中状态</el-button>
<el-button @click="toggleSelection()">取消选择</el-button>
<el-button type="primary" @click="importData">导入</el-button>
<el-button type="primary" @click="outportData">导出</el-button>
</p>
<!-- 导入 -->
<el-dialog title="导入" :visible.sync="dialogImportVisible" :modal-append-to-body="false" :close-on-click-modal="false" class="dialog-import">
<p :class="{'import-content': importFlag === 1, 'hide-dialog': importFlag !== 1}">
<el-upload class="upload-demo"
:action="importUrl"
:name ="name"
:headers="importHeaders"
:on-preview="handlePreview"
:on-remove="handleRemove"
:before-upload="beforeUpload"
:on-error="uploadFail"
:on-success="uploadSuccess"
:file-list="fileList"
:with-credentials="withCredentials">
<!-- 是否支持发送cookie信息 -->
<el-button size="small" type="primary" :disabled="processing">{{uploadTip}}</el-button>
<p slot="tip" class="el-upload__tip">只能上传excel文件</p>
</el-upload>
<p class="download-template">
<a class="btn-download" @click="download">
<i class="icon-download"></i>下载模板</a>
</p>
</p>
<p :class="{'import-failure': importFlag === 2, 'hide-dialog': importFlag !== 2}" >
<p class="failure-tips">
<i class="el-icon-warning"></i>导入失败</p>
<p class="failure-reason">
<h4>失败原因</h4>
<ul>
<li v-for="(error,index) in errorResults" :key="index">第{{error.rowIdx + 1}}行，错误：{{error.column}},{{error.value}},{{error.errorInfo}}</li>
</ul>
</p>
</p>
</el-dialog>
<!-- 导出 -->
</p>
</template>
<script>
import * as scheduleApi from '@/api/schedule'
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:'www.baidu.com',//后台接口config.admin_url+'rest/schedule/import/'
importHeaders:{
enctype:'multipart/form-data',
cityCode:''
},
name: 'import',
fileList: [],
withCredentials: true,
processing: false,
uploadTip:'点击上传',
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 = '点击上传'
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='上海'//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('.')).toLowerCase();
if (excelfileExtend.indexOf(fileExtend) <= -1) {
this.$message.error('文件格式错误')
return false
}
this.uploadTip = '正在处理中...'
this.processing = true
},
//上传错误
uploadFail(err, file, fileList) {
this.uploadTip = '点击上传'
this.processing = false
this.$message.error(err)
},
//上传成功
uploadSuccess(response, file, fileList) {
this.uploadTip = '点击上传'
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('导入成功')
this.doSearch()
}
},
//下载模板
download() {
//调用后台模板方法,和导出类似
scheduleApi.downloadTemplate()
},
}
};
</script>
<style scoped>
.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()
})
}The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
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