SpreadJS 14
Import and Export Reference / Excel-Formatted Files Import / Locale-based Date Format Imported
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    Locale-based Date Format Imported
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    SpreadJS allows you to customize the date format based on your system locale settings while importing an Excel file.

    For example, when an Excel file containing the date format as dd/mm/yyyy is imported in EN culture, the date format is displayed as dd/mm/yyyy in SpreadJS. But when the same Excel file is imported in French culture, the date format is displayed as yyyy-MM-dd in SpreadJS as it is the default date format in French. The default number format id for French culture is 14. You can set the default number format id to any other number format like: {14: yyyy-M-d} to display the custom date format.

    The custom date format can be specified to the default number format id using LocalNumberFormat field, before importing the Excel file in SpreadJS.

    The custom date format can be set by using following steps:

    1. Get the Excel built-in number format.
    2. Create new culture info and set the Excel number format to custom format.
    3. Set culture info to Culture Manager.
    4. Import the Excel file.

    The example below demonstrates how to set the custom date format to default number format id of French culture.

    Copy Code
    // Initialize Spread
    var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 1 });
    // Get the sheet
    var sheet = spread.sheets[0];
    var excelIO = new GC.Spread.Excel.IO();
    $("#button1").click(function () {
        // Create new culture info
        var culture = new GC.Spread.Common.CultureInfo();
        culture.LocalNumberFormat = {
           14: "yyyy/m/d"
        // Set culture info to Culture Manager
        GC.Spread.Common.CultureManager.addCultureInfo("fr", culture);
        // Import Excel file
        var excelFile = document.getElementById("fileDemo").files[0];
        excelIO.open(excelFile, function (json) {
            var workbookObj = json;
        }, function (e) {