无法使用SheetJS从xlsb文件读取特定的单元格值

Question

我正在尝试使用SheetJs读取.xlsb文件，并从某些单元格中提取一些值。

当我要提取单元格值时，总是会得到“未定义”作为响应。

这是我的代码：

var url = "test.xlsb";

var oReq = new XMLHttpRequest();
oReq.open("GET", url, true);
oReq.responseType = "arraybuffer";

oReq.onload = function(e) {
var arraybuffer = oReq.response;

/* convert data to binary string */
var data = new Uint8Array(arraybuffer);
var arr = new Array();
for(var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");

/* Call XLSX */
var workbook = XLSX.read(bstr, {type:"binary"});

/* DO SOMETHING WITH workbook HERE /
var first_sheet_name = workbook.SheetNames[0];
/ Get worksheet */
var worksheet = workbook.Sheets[first_sheet_name];

var address_of_cell = 'A1';

/* Get worksheet */
var worksheet = workbook.Sheets[first_sheet_name];

/* Find desired cell */
var desired_cell = worksheet[address_of_cell];

/* Get the value */
var desired_value = (desired_cell ? desired_cell.v : undefined);
}

oReq.send();

对此有任何帮助吗？

谢谢， 胺