node.js - 无法读取未定义的属性(读取 'F_OK' )

Question

readFile 给出未捕获( promise 中)类型错误:无法读取未定义的属性(读取“F_OK”)

ExcelJS:^4.3.0
Node JS:v14.18.2

重现步骤

const wb = new ExcelJS.Workbook();

const fullPath = path.resolve("excelName.xlsx");
await wb.xlsx.readFile(fullPath );


const buffer = await wb.xlsx.writeBuffer();

Answer 1

对我来说这是这样的:

    upload(fileToUpload: File) {
      this.readFile(fileToUpload, (data) =>this.readDataFromFile(data));
    }

    private readFile(fileToUpload: File, callback) {
       const reader = new FileReader();
       let data;
       reader.onload = function () {
          data = reader.result;
          callback(data);
       }
       reader.readAsArrayBuffer(fileToUpload);
    }

    private readDataFromFile(data: any) {
       var workbook = new Excel.Workbook();
       workbook.xlsx.load(data)
         .then(workbook => {
            console.log(workbook, 'workbook instance');

             workbook.eachSheet((sheet, id) => {
                sheet.eachRow((row, rowIndex) => {
                console.log(row.values, rowIndex);
                });
             });
        });
    }

将 Excel 文件作为数组缓冲区读取，并使用 exceljs 不使用方法 readFile，而是使用 load。