#鸿蒙学习大百科#如何使用HarmongOS的异步能力实现单次I/O任务逻辑？

import { fileIo } from '@kit.CoreFileKit'
import { BusinessError } from '@kit.BasicServicesKit';
async function write(data: string, file: fileIo.File): Promise<void> {
  fileIo.write(file.fd, data).then((writeLen: number) => {
    console.info('write data length is: ' + writeLen)
  }).catch((err: BusinessError) => {
    console.error(`Failed to write data. Code is ${err.code}, message is ${err.message}`);
  })
}