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perf[UploadExcel-component]: set readerData to promise

This commit is contained in:
Pan 2018-06-12 09:56:53 +08:00
parent 8c685cc4c6
commit 9f8ac37497
1 changed files with 21 additions and 15 deletions
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36
src/components/UploadExcel/index.vue
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@ -3,7 +3,7 @@
<input id="excel-upload-input" ref="excel-upload-input" type="file" accept=".xlsx, .xls" class="c-hide" @change="handkeFileChange">
<div id="drop" @drop="handleDrop" @dragover="handleDragover" @dragenter="handleDragover">
Drop excel file here or
<el-button style="margin-left:16px;" size="mini" type="primary" @click="handleUpload">browse</el-button>
<el-button :loading="loading" style="margin-left:16px;" size="mini" type="primary" @click="handleUpload">browse</el-button>
</div>
</div>
</template>
@ -52,22 +52,28 @@ export default {
const files = e.target.files
const itemFile = files[0] // only use files[0]
if (!itemFile) return
this.readerData(itemFile)
this.$refs['excel-upload-input'].value = null // fix can't select the same excel
this.loading = true
this.readerData(itemFile).then(() => {
this.$refs['excel-upload-input'].value = null // fix can't select the same excel
this.loading = false
})
},
readerData(itemFile) {
const reader = new FileReader()
reader.onload = e => {
const data = e.target.result
const fixedData = this.fixdata(data)
const workbook = XLSX.read(btoa(fixedData), { type: 'base64' })
const firstSheetName = workbook.SheetNames[0]
const worksheet = workbook.Sheets[firstSheetName]
const header = this.get_header_row(worksheet)
const results = XLSX.utils.sheet_to_json(worksheet)
this.generateDate({ header, results })
}
reader.readAsArrayBuffer(itemFile)
return new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onload = e => {
const data = e.target.result
const fixedData = this.fixdata(data)
const workbook = XLSX.read(btoa(fixedData), { type: 'base64' })
const firstSheetName = workbook.SheetNames[0]
const worksheet = workbook.Sheets[firstSheetName]
const header = this.get_header_row(worksheet)
const results = XLSX.utils.sheet_to_json(worksheet)
this.generateDate({ header, results })
resolve()
}
reader.readAsArrayBuffer(itemFile)
})
},
fixdata(data) {
let o = ''