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<template>
<div>
<el-button :loading="loading" type="primary" @click="handleUpload">select excel file</el-button>
<input id="excel-upload-input" type="file" accept=".xlsx, .xls" class="c-hide" @change="handkeFileChange">
</div>
</template>
<script>
import XLSX from 'xlsx'
export default {
data() {
return {
loading: false,
excelData: {
header: null,
results: null
}
}
},
methods: {
generateDate({ header, results }) {
this.excelData.header = header
this.excelData.results = results
this.loading = false
this.$emit('on-selected-file', this.excelData)
},
handleUpload() {
document.getElementById('excel-upload-input').click()
},
handkeFileChange(e) {
this.loading = true
const files = e.target.files
const itemFile = files[0] // only use files[0]
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)
},
fixdata(data) {
let o = ''
let l = 0
const w = 10240
for (; l < data.byteLength / w; ++l) o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w, l * w + w)))
o += String.fromCharCode.apply(null, new Uint8Array(data.slice(l * w)))
return o
},
get_header_row(sheet) {
const headers = []
const range = XLSX.utils.decode_range(sheet['!ref'])
let C
const R = range.s.r /* start in the first row */
for (C = range.s.c; C <= range.e.c; ++C) { /* walk every column in the range */
var cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })] /* find the cell in the first row */
var hdr = 'UNKNOWN ' + C // <-- replace with your desired default
if (cell && cell.t) hdr = XLSX.utils.format_cell(cell)
headers.push(hdr)
}
return headers
}
}
}
</script>
<style scoped>
#excel-upload-input{
display: none;
z-index: -9999;
}
</style>