自定义elementui上传文件以及携带参数问题

    <el-upload
        ref="upload"
        style="display: inline"
        drag
        action=""
        :before-upload="beforeUploadHandle"
        :http-request="handleUploadForm"
        :auto-upload="false"
        multiple
        :limit="1"
        :on-exceed="handleExceed">
      <el-link icon="el-icon-paperclip" type="primary">添加需要上传的文件</el-link>
    </el-upload>

:auto-upload=“false”

:limit=“1”

:before-upload=“beforeUploadHandle”

:http-request=“handleUploadForm”

:on-exceed=“handleExceed”

this.$refs.upload.submit();

    beforeUploadHandle(file) {
      if (
          file.type !== "image/png" &&
          file.type !== "image/jpeg"
      ) {
        this.$message.error("只支持.jpg、.jpeg、.jpe、.png文件！");
        return false;
      }
    },

handleUploadForm(param) {
      console.log(this.pid)
      let thisInfo = this
      let formData = new FormData()
      // 在formData中加入我们需要的参数
      formData.append('file', param.file)
    	formData.append('id', this.pid)
    // 向后端发送数据
      thisInfo.$axios.post('api/user/update_Info/', formData).then((res) => {
        if (res.status === 200) {
          thisInfo.$message.success('修改信息成功')
        } else {
          thisInfo.$message.success('修改信息失败')
        }
        thisInfo.formFileList = []
        thisInfo.uploadFormFileList = []
      })
    }