我在SO上找不到与我的问题相符的任何内容。我正在使用Sheetjs插件将excel表转换为json，并在浏览器中使用jquery显示它。我能够进行转换和显示，但我有一个用例，我需要使用jquery ajax'GET'调用返回的数据验证每个json行。
我也可以执行验证。一旦每个excel json行根据ajax响应的值进行验证，基于一组规则，excel json行被标记为成功行或错误行。对于成功行，我不执行任何操作。对于错误行，我需要在json元素中添加一个额外的键/值对，表示错误类型和错误描述。此外，当在浏览器中显示时，此错误行需要具有带有颜色的css样式：红色表示红色文本，以指示错误。
我在Sheetjs文档中没有看到任何可能允许我这样做的内容，但我很确定它可以完成。在下面的代码中，我必须修改名为BindTable（）的辅助函数，以便添加css样式以将文本颜色设置为红色，如果它是错误行。我还必须以某种方式为每个错误行添加一个以显示错误类型和错误描述。
在下面的代码中，我需要能够显示invalidRequests JSON对象，并应用css样式以红色显示文本。或者，如果有一种方法可以直接操作exceljson JSON对象以某种方式将MSG1 /消息的键/值对附加到每个错误行，那就更好了。我意识到由于这个问题的性质，我无法创建一个jsfiddle，但任何想法/建议/评论都会非常有用，即使它没有提供完整的解决方案。
预期格式：
author1 JOHN DOE USA N.AMERICA 错误：这个作者姓名已经存在于系统中！
这是我目前的代码：
//Excel Reader
function ExcelToTable(event) {
event.preventDefault();
var regex = /^([a-zA-Z0-9\s_\\.\-:])+(.xlsx|.xls)$/;
/*Checks whether the file is a valid excel file*/
if (regex.test($("#excelfile").val().toLowerCase())) {
var xlsxflag = false; /*Flag for checking whether excel is .xls
format or .xlsx format*/
if ($("#excelfile").val().toLowerCase().indexOf(".xlsx") > 0) {
xlsxflag = true;
}
/*Checks whether the browser supports HTML5*/
if (typeof (FileReader) != "undefined") {
var reader = new FileReader();
reader.onload = function (e) {
var data = e.target.result;
//pre-process data
var binary = "";
var bytes = new Uint8Array(data);
var length = bytes.byteLength;
for(var i=0;i<length;i++){
binary += String.fromCharCode(bytes[i]);
}
// /pre-process data
/*Converts the excel data in to object*/
if (xlsxflag) {
// var workbook = XLSX.read(data, { type: 'binary' });
var workbook = XLSX.read(binary, {type: 'binary'});
}
else {
var workbook = XLS.read(binary, { type: 'binary' });
}
/*Gets all the sheetnames of excel in to a variable*/
var sheet_name_list = workbook.SheetNames;
// console.log('Sheet name list : ' + sheet_name_list);
var cnt = 0; /*This is used for restricting the script to
consider only first sheet of excel*/
// sheet_name_list.forEach(function (y) { /*Iterate through
all sheets*/
/*Convert the cell value to Json*/
if (xlsxflag) {
exceljson =
XLSX.utils.sheet_to_json(workbook.Sheets['CUSTOM_EXCEL_TAB'],{defval:
"NULL"});
var emptyAuthorCells =[];
var invalidCountryCells = [];
Object.keys(exceljson).forEach(function(value, key) {
if(exceljson[key].AUTHOR == 'ADD'){
}
else if(exceljson[key].AUTHOR == 'NULL'){
emptyAuthorCells.push({'MARKET':
exceljson[key].MARKET, 'REGION':exceljson[key].REGION,
'PARTNER':exceljson[key].PARTNER, 'AUTHOR': exceljson[key].AUTHOR });
}
//check effective end date
if((exceljson[key].DATE_ENDING != '') ||
(exceljson[key].DATE_ENDING <= getTodayDate())){
invalidCountryCells.push({
'MARKET': exceljson[key].MARKET,
'REGION':exceljson[key].REGION, 'PARTNER':exceljson[key].PARTNER, 'AUTHOR':
exceljson[key].AUTHOR
});
}
});
var emptyActionCellsMessage = "There were " +
emptyAuthorCells.length + " rows with Author=Null <br />";
var completedActionCellsMessage = " Success! There
were " + emptyAuthorCells.length + " rows with authro=Null <br />";
var invalidDateMsg = "There are missing or incorrect
date values.";
var validCompareDataMessage = "Success! All data has been successfully validated!";
var invalidCompareDataMessage = "Validation Failed!
Data does not match Rules.";
}
else {
var exceljson =
XLS.utils.sheet_to_row_object_array(workbook.Sheets[y]);
}
var conflictRows = [];
var returnedRows = [];
var errorReturnedRows = [];
if(emptyAuthorCells.length == 0){
var uniqueAuthor = $.unique(exceljson.map(function
(d){
return d.MARKET;
}));
var doAllValidations = function(){
var ajaxList = [];
var ajxIndex = 1;
$.each(uniqueAuthor, function (index, value){
var jqResponse =
$.ajax({
type: "get",
url: "authorlist.cfm?method=getlist&name=" +
value,
dataType: "json"
});
ajaxList.push(jqResponse);
jqResponse.then(
function( apiResponse ){
$.each (apiResponse, function (cc) {
if(apiResponse[cc].hasOwnProperty('SUCCESS')){
errorReturnedRows.push({
'success':
apiResponse[cc].SUCCESS,
'message':
apiResponse[cc].MESSAGE,
'country_code' : value
});
}
else{
returnedRows.push(apiResponse[cc]);
}
// }
// }
});
}
);
});
return ajaxList;
};
// /LOOP OVER country_code
}
var invalidRequests = [];
var validRequests = [];
$(function() {
var ajaxCalls = doAllValidations();
//begin apply
$.when.apply($, ajaxCalls).done(function(){
//console.log(ajaxList);
$('#hidReturnedRows').val();
$('#hidReturnedRows').val(JSON.stringify(returnedRows));
if (exceljson.length > 0 && cnt == 0) {
if((emptyAuthorCells.length != 0) ||
(errorReturnedRows.length!=0) ) {
//data is invalid
console.log("data is invalid");
$('#displayErrors tr
td.previewSuccessClass').html("");
$('#displayErrors tr
td.previewErrorsClass').html(emptyActionCellsMessage);
$('#export-file').addClass('hidebtn');
}
else{
//outer loop
var found = false;
var book_found = false;
var response_validation_errors = [];
var message = "The author's zone is
incorrect";
var message2 = "This book already
exists";
$.each(exceljson, function(x, ej){
// console.log("inside outer
loop");
found = false;
$.each(returnedRows, function(y,
rr){
//compare inner row with outer
row to make sure they're the same
if(rr.AUTHOR_ID == ej.ID &&
rr.AUTHOR_NAME == ej.NAME)
{
if((rr.AUTHOR ==
ej.NATIVE_AUTHOR) && (rr.BOOK_QUALITY == ej.AUTHOR_ZONE)){
// console.log("found!");
found = true;
}
}
});
if(found){
invalidRequests.push({
"AUTHOR": ej.NAME,
"AUTHOR_ZONE":
ej.AUTHOR_ZONE,
"COUNTRY": ej.COUNTRY
});
}
else{
validRequests.push(ej);
}
});
// /outer loop
}
BindTable(exceljson, '#exceltable');
cnt++;
}
})();
//end apply
});
};
if (xlsxflag) {/*If excel file is .xlsx extension than creates a
Array Buffer from excel*/
reader.readAsArrayBuffer($("#excelfile")[0].files[0]);
}
else {
reader.readAsBinaryString($("#excelfile")[0].files[0]);
}
}
else {
alert("Sorry! Your browser does not support HTML5!");
}
}
else {
alert("Please upload a valid Excel file!");
}
}
//Helper funcs
function BindTable(jsondata, tableid, invalidreqs) {/*Function used to convert the JSON
array to Html Table*/
var columns = BindTableHeader(jsondata, tableid); /*Gets all the column
headings of Excel*/
//ADDED .map() & .find() INSTEAD OF NESTED LOOPS
jsondata.map(a => {
// SEARCH FOR AN ELEMENT IN invalidreqs THAT MATCH THE
// CRITERIA TESTED FOR IN THE FUNCTION
if (invalidreqs.find(b => {
return a.AUTHOR == b.AUTHOR && a.BOOKNAME == b.BOOKNAME && a.COUNTRY ==
b.COUNTRY;
})) {
a.MSG = "THIS ROW ALREADY EXISTS";
}
}）;
console.log（jsondata）;
//THE BELOW CODE NEEDS TO BE CHANGED
var row$ = $('<tr/>');
for (var colIndex = 0; colIndex < columns.length; colIndex++) {
var cellValue = jsondata[i][columns[colIndex]];
row$.append($('<td/>').html(cellValue));
}
//console.log("before table append");
$(tableid).append(row$);
if( has_error ){
row$.addClass( 'response-errors' );//add class to make text red
var error_row = $('<tr/>');
var error_cell = $('<td/>');
error_cell.attr('colspan', column.length); //set cols to span lenght of row
error_cell.html("SET ERROR MESSAGE TO DISPLAY BASED ON invalidreq object");
error_row.append( error_cell );
$( tableid ).append( error_row );
}
}
// /Outer loop
}
function BindTableHeader(jsondata, tableid) {/*Function used to get all
column names from JSON and bind the html table header*/
var columnSet = [];
var headerTr$ = $('<tr/>');
for (var i = 0; i < jsondata.length; i++) {
var rowHash = jsondata[i];
for (var key in rowHash) {
if (rowHash.hasOwnProperty(key)) {
if ($.inArray(key, columnSet) == -1) {/*Adding each unique
column names to a variable array*/
columnSet.push(key);
// console.log(key);
headerTr$.append($('<th/>').html(key));
}
}
}
}
$(tableid).append(headerTr$);
return columnSet;
}
答案 0 :(得分：1)
好的，你要做的是：
1）将行索引分配给invalidRequests对象，在第191行，如下所示：
invalidRequests.push({
"AUTHOR": ej.NAME,
"AUTHOR_ZONE": ej.AUTHOR_ZONE,
"COUNTRY": ej.COUNTRY,
"index": x,
"MSG1": "Put the error message here"
});
现在很容易确定哪一行有错误。
由于invalidRequests是ExcelTable函数的私有对象，因此您需要
2）将其传递给BindTable函数，如下所示：
BindTable(exceljson, '#exceltable', invalidRequests);
3）修改BindTable函数以检查invalidRequests并处理它们：
function BindTable(jsondata, tableid, invalidreqs) {
var columns = BindTableHeader(jsondata, tableid);
for (var i = 0; i < jsondata.length; i++) {
//look for rows with error
var has_error = false
var invalidreq
for(var u=0;u<invalidreqs.length;u++){
if(i==invalidreqs[u].index){
//found invalid request belonging to current row, set flag
has_error = true
invalidreq = invalidreqs[u] // and store the current invalidrequest infos on temp obj
//break - not really needed
}
}
var row$ = $('<tr/>');
for (var colIndex = 0; colIndex < columns.length; colIndex++) {
var cellValue = jsondata[i][columns[colIndex]];
row$.append($('<td/>').html(cellValue));
}
$(tableid).append(row$);
if(has_error){
row$.addClass('error') // add css class which will make the text red or whatever
var error_row = $('<tr/>') // create error row
var error_cell = $('<td/>')
error_cell.attr('colspan',columns.length) // set column to span over all columns of table
error_cell.html(invalidreq.MSG1)
error_row.append(error_cell)
$(tableid).append(error_row);
}
}
}
请注意，您的代码中不清楚，也不清楚错误应出现在哪一列。尝试通过将该信息推送到invalidRequests对象并在BindTable上读取来自己实现。