通过javascript获取Excel特定列值并为文本框赋值

Question

我在变量中获取整个 Excel 数据，excelRows此时我只想将“SRNO”列的第 1 个值获取到文本框function Upload() {        //Reference the FileUpload element.        var fileUpload = document.getElementById("ExcelFile");        //Validate whether File is valid Excel file.        var regex = /^([a-zA-Z0-9\s_\\.\-:])+(.xls|.xlsx)$/;        if (regex.test(fileUpload.value.toLowerCase())) {            if (typeof (FileReader) != "undefined") {                var reader = new FileReader();                reader.onload = function (e) {                    FillRow(e.target.result);                };                reader.readAsBinaryString(fileUpload.files[0]);                reader.readAsArrayBuffer(fileUpload.files[0]);            }            else {                alert("This browser does not support HTML5.");            }        } else {            alert("Please upload a valid Excel file.");        }    };    function FillRow(data) {        var workbook = XLSX.read(data, {            type: 'binary'        });        var sel_val = document.getElementById("ddlSheetName").value;        var excelRows = XLSX.utils.sheet_to_row_object_array(workbook.Sheets[sel_val]);        for (var j = 0; j <= excelRows.length; j++) {            //how to fetch first value and last value of specific column        }    };我是 Javascript 的新手，所以任何帮助将不胜感激。