<!-- excel文件上传 -->
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<template>
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<div class="upload-excel">
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<div class="btn-upload">
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<el-button
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:loading="loading"
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size="mini"
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type="primary"
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@click="handleUpload"
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>
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点击上传
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</el-button>
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</div>
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<input
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ref="excel-upload-input"
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class="excel-upload-input"
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type="file"
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accept=".xlsx, .xls"
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@change="handleClick"
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/>
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<div
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class="drop"
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@drop="handleDrop"
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@dragover="handleDragover"
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@dragenter="handleDragover"
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>
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<i class="el-icon-upload" />
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<span>将文件拖到此处</span>
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</div>
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</div>
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</template>
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<script>
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import XLSX from "xlsx";
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export default {
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name: "UploadExcel",
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props: {
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beforeUpload: Function, // eslint-disable-line
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onSuccess: Function, // eslint-disable-line
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},
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data() {
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return {
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loading: false,
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excelData: {
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header: null,
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results: null,
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},
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};
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},
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methods: {
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generateData({ header, results }) {
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this.excelData.header = header;
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this.excelData.results = results;
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this.onSuccess && this.onSuccess(this.excelData);
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},
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handleDrop(e) {
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e.stopPropagation();
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e.preventDefault();
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if (this.loading) return;
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const files = e.dataTransfer.files;
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if (files.length !== 1) {
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this.$message.error("Only support uploading one file!");
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return;
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}
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const rawFile = files[0]; // only use files[0]
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if (!this.isExcel(rawFile)) {
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this.$message.error(
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"Only supports upload .xlsx, .xls, .csv suffix files"
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);
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return false;
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}
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this.upload(rawFile);
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e.stopPropagation();
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e.preventDefault();
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},
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handleDragover(e) {
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e.stopPropagation();
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e.preventDefault();
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e.dataTransfer.dropEffect = "copy";
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},
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handleUpload() {
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this.$refs["excel-upload-input"].click();
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},
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handleClick(e) {
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const files = e.target.files;
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const rawFile = files[0]; // only use files[0]
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if (!rawFile) return;
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this.upload(rawFile);
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},
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upload(rawFile) {
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this.$refs["excel-upload-input"].value = null; // fix can't select the same excel
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if (!this.beforeUpload) {
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this.readerData(rawFile);
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return;
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}
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const before = this.beforeUpload(rawFile);
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if (before) {
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this.readerData(rawFile);
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}
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},
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readerData(rawFile) {
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this.loading = true;
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onload = (e) => {
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const data = e.target.result;
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const workbook = XLSX.read(data, { type: "array" });
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const firstSheetName = workbook.SheetNames[0];
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const worksheet = workbook.Sheets[firstSheetName];
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const header = this.getHeaderRow(worksheet);
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const results = XLSX.utils.sheet_to_json(worksheet);
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this.generateData({ header, results });
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this.loading = false;
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resolve();
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};
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reader.readAsArrayBuffer(rawFile);
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});
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},
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getHeaderRow(sheet) {
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const headers = [];
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const range = XLSX.utils.decode_range(sheet["!ref"]);
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let C;
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const R = range.s.r;
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/* start in the first row */
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for (C = range.s.c; C <= range.e.c; ++C) {
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/* walk every column in the range */
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const cell = sheet[XLSX.utils.encode_cell({ c: C, r: R })];
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/* find the cell in the first row */
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let hdr = "UNKNOWN " + C; // <-- replace with your desired default
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if (cell && cell.t) hdr = XLSX.utils.format_cell(cell);
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headers.push(hdr);
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}
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return headers;
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},
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isExcel(file) {
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return /\.(xlsx|xls|csv)$/.test(file.name);
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},
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},
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};
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</script>
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<style scoped lang="scss">
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.upload-excel {
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display: flex;
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justify-content: center;
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margin-top: 100px;
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.excel-upload-input {
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display: none;
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z-index: -9999;
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}
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.btn-upload,
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.drop {
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border: 1px dashed #bbb;
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width: 350px;
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height: 160px;
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text-align: center;
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line-height: 160px;
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}
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.drop {
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line-height: 80px;
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color: #bbb;
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i {
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font-size: 60px;
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display: block;
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}
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}
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}
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</style>
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