Complete code of Vue + iView to realize Excel upload function

<Col span="2">Upload file:</Col>
<Col span="22" class="uploadExcelBox">
    <Upload ref="uploadExcel" :loading="uploadLoading" :action="uploadFileUrl" accept="xlsx,xls" :format="uploadFormat" :before-upload="beforeImgFile" :on-success="successImgFile" :on-error="errorImgFile" :show-upload-list="true">
         <Button type="success">Upload attachment</Button>
	 </Upload>
     <div v-if="uploadingFile !== null">File to be uploaded:
          <span class="blueFont">{{ fileName }}</span>
          <Button @click="uploadFun(index)" :loading="loadingStatus" class="manualUploadBtn">{{ loadingStatus ? 'Uploading...' : 'Click to start uploading' }}</Button>
      </div>
</Col>

<script>
    // import excel from '@/libs/excel'
	import service from '@/libs/request' //Used to get the current domain name import reportFormApi from '@/api/reportForm'
    export default {
        data() {
            return {
                uploadLoading:false, //Upload control loading status uploadFileUrl: "",
				uploadFormat:['xlsx','xls'],
				uploadingFile:null, //File to be uploaded loadingStatus:false, //Status of upload component fileName:"", //Name of the file to be uploaded}
        },
        mounted() {
            this.uploadFileUrl = service.apiUrl + "/qingximaster/winInfo/execlAdd"; //Interface path for uploading Excel, provided by backend personnel.
        },
        methods: {
			// Before uploading the image beforeImgFile(file) {
				// console.log(file);
				const fileExt = file.name.split('.').pop().toLocaleLowerCase()
				if (fileExt === 'xlsx' || fileExt === 'xls') {
					var formdata = new FormData();
					formdata.append("file",file);
                    this.fileName = formdata.get('file').name; //Through the formdata.get('file') method, you can get the information in the file, such as the Excel file name.
					this.uploadingFile = formdata; //Note: This will be passed as a parameter to the interface to upload. The file passed to the interface does not need formdata.get('file'), just pass the file directly.
				} else {
					this.$Notice.warning({
						title: 'File type error',
						desc: 'File:' + file.name + 'Not an EXCEL file, please select an EXCEL file with the suffix .xlsx or .xls. '
					})
				}
				return false
			},
			// Upload successfully successImgFile(response, file, fileList) {
                this.$Notice.success({
                    title: 'Tips',
                    desc: 'Upload successful! '
                })
			},
			// Upload failed errorImgFile(error, file, fileList) {
				this.$Notice.success({
                    title: 'Tips',
                    desc: 'Upload failed! '
                })
				console.log(error);
			},
			uploadFun(index){//Call interface to upload Excel
				this.loadingStatus = true;
				reportFormApi.uploadExcel({
                    url: this.uploadFileUrl,
                    file: this.uploadingFile
                }).then(res =>{
					this.uploadingFile = null;
                    this.fileName = "";
                    if(res.code==0){
                        this.infoList[index].content = JSON.stringify(res.data);
					    // console.log(this.infoList[index].content);
                        this.$Message.success("Upload successful!");
                    }else{
                        this.$Message.error(res.message);
                    }
				}).finally(()=>{
					this.loadingStatus = false;
                    this.uploadLoading = false;
                })
			},
        }
    }