需求：前后端完全分離的項目，需要一個導(dǎo)出功能，前端使用ant design vue，后端 NetCore5.0，后臺返回數(shù)據(jù)為 IActionResult

exportExcel(){
      exportExcel().then((res)=>{
          this.downloadfile(res)
          // eslint-disable-next-line handle-callback-err
        }).catch((err) => {
          this.$message.error('下載錯誤：獲取文件流錯誤')
        })
    },
       
      downloadfile(res) {
        var blob = new Blob([res.data], {
          type: 'application/octet-stream;charset=UTF-8'
        })
        var contentDisposition = res.headers['content-disposition']
        var patt = new RegExp('filename=([^;]+\\.[^\\.;]+);*')
        var result = patt.exec(contentDisposition)
        var filename = result[1]
        var downloadElement = document.createElement('a')
        var href = window.URL.createObjectURL(blob) // 創(chuàng)建下載的鏈接
        var reg = /^["](.*)["]$/g
        downloadElement.style.display = 'none'
        downloadElement.href = href
        downloadElement.download = decodeURI(filename.replace(reg, '$1')) // 下載后文件名
        document.body.appendChild(downloadElement)
        downloadElement.click() // 點擊下載
        document.body.removeChild(downloadElement) // 下載完成移除元素
        window.URL.revokeObjectURL(href)
      },