Vue 图片上传formdata()传参形式

// 文件上传
<div  class="file">
   <el-button  type="primary" style="width:170px" icon="el-icon-upload2">重新导入文件</el-button>
   <input :value="uploadValue" v-if="refush" ref="referenceUpload" class="upload" type="file"  v-on:change="importfxx($event)" accept=".csv, application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, application/vnd.ms-excel" />
</div>
// 失败文件下载

// 文件上传
importfxx(event) {
      console.log("准备上传",this.fileData);
      this.loading =true
      this.file = null
      this.file = event.currentTarget.files[0];
      let suffix = this.file.name.split(".")[(this.file.name.split(".").length-1)]
      console.log("文件信息",suffix)
      if (suffix != 'xlsx' && suffix != 'xls'){
          this.loading =false
            this.$message({
                message: '不支持的文件类型，请下载模板',
                type: 'warning'
            });
           return false
      }  else {
          this.isWrong = false;
          let _this = this;
          let inputDOM = this.$refs.inputer;
          // 通过DOM取文件数据
          var rABS = false; //是否将文件读取为二进制字符串
          var f = this.file;
          var forData = new FormData()
          for( let key in this.fileData ) {
            if(this.fileData.hasOwnProperty(key)){ 
                forData.append(key,this.fileData[key])
              } 
          }
          forData.append("file",f)
          this.uploadValue = ''; //置空
          clearInterval(this.timer);

          
          // var customerId= JSON.parse(this.fileData.customerId);
          let param = new Object()
          for( let key in this.fileData ) {
            if(this.fileData.hasOwnProperty(key)){ 
                param[key] = this.fileData[key]
              } 
          }
          console.log('param', param)
          this.request(forData).then(resp =>{
          if (resp.respCode == 'success'){
                this.totalNum = resp.totalNum;
                console.log("上传成功");
                //记录id
                //var id=0;
                this.timer = setInterval(()=>{
                      // 检测最近有没有上传失败记录
                      this.downWrongExcel(param).then(rep=>{
                          if (rep.respData) {
                              if (rep.respData.opStatus==1) {
                                  //if(rep.respData.opStatus==1||rep.respData.opStatus==2){
                                  console.log("bbbb");
                                  this.loading =false
                                  //id=rep.respData.id;
                                  this.step = 2;
                                  this.totalNum=rep.respData.totalNum;
                                  this.finishedNum=rep.respData.finishedNum;
                                  this.percentage=Math.round(rep.respData.finishedNum/rep.respData.totalNum*100) ;
                                  console.log("百分比"+this.percentage);
                                  console.log("百分比"+this.percentage);
                                  console.log("总数"+rep.respData.totalNum);
                                  console.log("已完成"+rep.respData.finishedNum);
                                  if (rep.respData.totalNum==rep.respData.finishedNum) {
                                      console.log("结束");
                                      // clearInterval(this.timer);
                                      // this.$message({
                                      //     message: '导入成功',
                                      //     type: 'success'
                                      // })
                                      // if (rep.respData.list) {this.$emit('success', rep.respData.list)} // 导入成功回调
                                      this.refush=false
                                      this.loading =false
                                      // this.dialogVisible = false
                                  }
                              } else if(rep.respData.opStatus==2){
                                  console.log("导入成功");
                                  clearInterval(this.timer);
                                  // this.$message({
                                  //     message: '导入成功',
                                  //     type: 'success'
                                  // })
                                  this.$emit('success',rep.respData.list)// 导入成功回调
                                  this.refush=true
                                  this.loading =false
                                  this.dialogVisible = false
                              } else if(rep.respData.opStatus==4){
                                console.log("校验不通过");
                                this.step = 3;
                                this.loading =false;
                                this.refush = true;
                                this.report = `由于导入内容未按照模板格式进行填写，部分车牌号码导入失败，请下载文档查看导入失败的车牌号码！`
                                clearInterval(this.timer);
                              }
                          }
                          
                          // else{
                          //     console.log("校验不通过");
                          //     clearInterval(interval);
                          // }  
                      });
                    },2000)
          } else {
             console.log('文件导入失败')
              //clearInterval(interval);
              this.isWrong = true;
              this.step=3;
              this.loading =false
               //this.isReport =true
               this.refush=false
               this.report=resp.respMsg
               if (this.report == `每次导入上限为${this.maxLength}条`) {
                  this.isShowErrBtn = false
               } else {
                  this.isShowErrBtn = true
               }
               this.initBox =false
               this.$message({
                  message: resp.respMsg,
                  type: 'warning'
               })
               let that =this
               setTimeout(function(){
                that.refush=true
               },100)
               this.$emit('error',{})// 失败回调
            }
          }).catch(function (error) {
            //clearInterval(interval);
            _this.refush=false
            _this.loading =false
            _this.$message({
                message: '文件导入错误',
                type: 'warning'
            })
            console.log(error,'文件导入错误')
          })

        }   
      },


// 失败文件下载