Question

当我将文件拖放到我的网站上时，我已经提取了一个解析excel函数，我正在使用打字稿，但收到一个奇怪的错误，我无法弄清楚它说类型承诺缺少以下属性{key ：数组; exceldoc：数组}

这是调用我的函数的代码

const onDrop = useCallback(async (acceptedFiles) => { 
  if (acceptedFiles.length > 1) {
    creatorStore.addOutputMessages([['error', `More than one file was selected`]]);
    return false;
  }
  const fileNamesplit = acceptedFiles[0].name.split('.');
  if (fileNamesplit[1] === 'xls' || fileNamesplit[1] === 'xlsx' || fileNamesplit[1] === 'csv') {
    props.setStoreString('');
    try {
      const parsedExcel = await parseExcelFile(acceptedFiles[0]);
      if (parsedExcel.key.length > 0) {
        props.onChange('input', false);
        setShowDropArea(false);
        props.onChange('chips', true);
        props.setDropDownKeys(parsedExcel.key);
        props.setExcelDocumentObj(parsedExcel.exceldoc);
      }
    }catch(error) {
      creatorStore.addOutputMessages([['error', 'There was an error that occured when trying to read file']]);
      dragLeave();
    }
  }else {
    creatorStore.addOutputMessages([['error', 'File type is not supported please upload csv or excel file']]);
    return false;
  }
  return false;
}, [creatorStore, props]);

然后这是我的功能

import * as xlsx from 'xlsx';
export const parseExcelFile = (file: File): {key: Array<string | number>; exceldoc: Array<unknown>} => {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    let excelDocumentObject: Array<unknown> = [];
    let keys: Array<string | number> = [];
    reader.onload = (e) => {
      let data = null;
      const target = e.target !== null ? e.target : null;
      if (target !== null ) {
        data = (target as FileReader).result;
      }
      const workbook = xlsx.read(data, {type: 'binary'});
      workbook.SheetNames.map((sheetname,i) => {
        try {
          const jsonObj = xlsx.utils.sheet_to_json(workbook.Sheets[sheetname]);
          if (i > 0) {
            excelDocumentObject = excelDocumentObject.concat(jsonObj);
          }
          else {
            excelDocumentObject = jsonObj;
          }
          keys = keys.concat(Object.keys(jsonObj[0] as string));
        } catch(error) {  
          reject(error);
        }
      });

      resolve({key: keys, exceldoc: excelDocumentObject});

    };
    reader.readAsBinaryString(file);
  });
};

我可以将// @ ts-ignore放在重新调整新的Promise上，并且此代码可以按我期望的那样起作用，但我真的很好奇这个错误在说什么以及如何解决它

promise <未知>缺少以下属性

0 个答案: