perf[uploadExcel]: add beforeUpload hock

This commit is contained in:
Pan 2018-06-20 13:29:57 +08:00
parent 9cf00fd63a
commit cbc3ddd827
2 changed files with 37 additions and 11 deletions

View File

@ -12,6 +12,10 @@
import XLSX from 'xlsx' import XLSX from 'xlsx'
export default { export default {
props: {
beforeUpload: Function,
onSuccess: Function
},
data() { data() {
return { return {
loading: false, loading: false,
@ -25,7 +29,7 @@ export default {
generateDate({ header, results }) { generateDate({ header, results }) {
this.excelData.header = header this.excelData.header = header
this.excelData.results = results this.excelData.results = results
this.$emit('success', this.excelData) this.onSuccess && this.onSuccess(this.excelData)
}, },
handleDrop(e) { handleDrop(e) {
e.stopPropagation() e.stopPropagation()
@ -36,8 +40,8 @@ export default {
this.$message.error('Only support uploading one file!') this.$message.error('Only support uploading one file!')
return return
} }
const itemFile = files[0] // only use files[0] const rawFile = files[0] // only use files[0]
this.readerData(itemFile) this.upload(rawFile)
e.stopPropagation() e.stopPropagation()
e.preventDefault() e.preventDefault()
}, },
@ -51,13 +55,23 @@ export default {
}, },
handleClick(e) { handleClick(e) {
const files = e.target.files const files = e.target.files
const itemFile = files[0] // only use files[0] const rawFile = files[0] // only use files[0]
if (!itemFile) return if (!rawFile) return
this.readerData(itemFile).then(() => { this.upload(rawFile)
this.$refs['excel-upload-input'].value = null // fix can't select the same excel
})
}, },
readerData(itemFile) { upload(rawFile) {
this.$refs['excel-upload-input'].value = null // fix can't select the same excel
if (!this.beforeUpload) {
this.readerData(rawFile)
return
}
const before = this.beforeUpload(rawFile)
if (before) {
this.readerData(rawFile)
}
},
readerData(rawFile) {
this.loading = true this.loading = true
return new Promise((resolve, reject) => { return new Promise((resolve, reject) => {
const reader = new FileReader() const reader = new FileReader()
@ -73,7 +87,7 @@ export default {
this.loading = false this.loading = false
resolve() resolve()
} }
reader.readAsArrayBuffer(itemFile) reader.readAsArrayBuffer(rawFile)
}) })
}, },
fixdata(data) { fixdata(data) {

View File

@ -1,6 +1,6 @@
<template> <template>
<div class="app-container"> <div class="app-container">
<upload-excel-component @success='handleSuccess'></upload-excel-component> <upload-excel-component :on-success='handleSuccess' :before-upload="beforeUpload"></upload-excel-component>
<el-table :data="tableData" border highlight-current-row style="width: 100%;margin-top:20px;"> <el-table :data="tableData" border highlight-current-row style="width: 100%;margin-top:20px;">
<el-table-column v-for='item of tableHeader' :prop="item" :label="item" :key='item'> <el-table-column v-for='item of tableHeader' :prop="item" :label="item" :key='item'>
</el-table-column> </el-table-column>
@ -21,6 +21,18 @@ export default {
} }
}, },
methods: { methods: {
beforeUpload(file) {
const isLt2M = file.size / 1024 / 1024 < 1
if (isLt2M) {
return true
}
this.$message({
message: 'Please do not upload files larger than 2m in size.',
type: 'warning'
})
return false
},
handleSuccess({ results, header }) { handleSuccess({ results, header }) {
this.tableData = results this.tableData = results
this.tableHeader = header this.tableHeader = header