Show hidden columns in Kendo grid excel export

Question

I have a kendo grid and I can export its data into excel file without any problem. In my grid, some columns may be hidden because they do not have any value. However, I want

Answer 1

I was looking to achieve a similar thing and used the answer provided by @Ankur with slight modification as I needed to hide the columns again after the export.

Code as follows:

excelExport(e) {
                Spa.startLoading(); // loading overlay to hide the columns showing then hiding again
                var columns = e.sender.columns;
                var hiddenColumnNumbers = [];
                if (!exportFlag) {
                    for (let i = 0; i < columns.length; i++) {
                        if (columns[i].hidden) {
                            e.sender.showColumn(i);
                            hiddenColumnNumbers.push(i);
                        }
                    }
                    e.preventDefault();
                    exportFlag = true;
                    setTimeout(() => {
                        e.sender.saveAsExcel();
                        for (let j = 0; j < columns.length; j++) {
                            if (hiddenColumnNumbers.indexOf(j) > -1) {
                                e.sender.hideColumn(j);
                            }
                        }
                        Spa.stopLoading(); // hide loading overlay
                    });
                } else {
                    for (let k = 0; k < columns.length; k++) {
                        if (columns[k].hidden)
                            e.sender.hideColumn(k);
                    }
                    exportFlag = false;
                    Spa.stopLoading(); // hide loading overlay
                }
            },