Last Updated: 02 Oct 2019 15:01 by ADMIN
Cells in Spreadsheet are automatically underlined on second save or when the file is loaded dynamically.

Code to reproduce:
        string filePath = Server.MapPath("Test.xlsx");
        Telerik.Web.Spreadsheet.Workbook wkb = Telerik.Web.Spreadsheet.Workbook.Load(filePath);

Last Updated: 18 Apr 2019 07:43 by ADMIN
If you put a radspreadsheet inside a radtabstrip with multipage, the controls do not render properly.

In my scenario, I have a tabstrip embedded within a tabstrip, and a grid in the nested tabstrip.  That works fine.  Once you put a spreadsheet control in the multipage, the controls do not render properly. 

However, I was able to reproduce the results with the first scenario above, which is the most simple.
Last Updated: 22 May 2017 11:15 by ADMIN

The error message reads
'ContextMenus' could not be initialized. Details: Object reference on set to an instance of an object.
Last Updated: 15 Mar 2016 08:52 by ADMIN
Created by: Ivan Danchev
Comments: 0
Category: Spreadsheet
Type: Bug Report

Last Updated: 19 Sep 2016 14:16 by ADMIN
Pending Review
Last Updated: 05 Jan 2017 11:07 by Bo
The SpreadProcessing library gets into account the current server culture and the SpreadsheetDocumentProvider uses different decimal and list separators based on the culture while the RadSpreadsheet control supports only comma as a list separator and dot as a decimal separator. 

The JavaScript error that is thrown when using the "sv-SE" culture is caused by the fact that this culture uses the comma as a decimal separator and semicolon as a list separator. 

One possible workaround is to change the current thread's culture before creating the Spreadsheet's provider and then restore the culture.
Last Updated: 23 Aug 2017 11:57 by ADMIN
related to
workaround for rounding function is using Custom Functions

kendo.spreadsheet.defineFunction("ROUND", function (x) {
    return Math.round(x);
    ["x", "number"]

Cell cell = new Cell() { Index = 0, Formula = "=ROUND(1.2)", Bold = true, Background = "#fef0cd", Format = "$0" };
Last Updated: 17 Apr 2019 14:21 by ADMIN
Created by: Marin Bratanov
Comments: 0
Category: Spreadsheet
Type: Bug Report

The default font size on the client is not saved explicitly on the Excel file, so the Excel defaults take over (11px Calibri), so upon subsequent import all cells will have that font. Steps to repro: go to export the file import the file Expected: nothing changes Actual: all cells are 11px Calibri

Workaround: Set a default font when the cell font is null


public override void SaveWorkbook(Workbook workbook)
    string path = "C:\\path-to-output.xlsx";
    for (int i = 0; i < workbook.Sheets.Count; i++)
        for (int j = 0; j < workbook.Sheets[i].Rows.Count; j++)
            for (int l = 0; l < workbook.Sheets[i].Rows[i].Cells.Count; l++)
                string fontFamily = workbook.Sheets[i].Rows[i].Cells[l].FontFamily;
                workbook.Sheets[i].Rows[i].Cells[l].FontFamily = !string.IsNullOrEmpty(fontFamily) ? fontFamily : "Courier New";
                double? fontSize = workbook.Sheets[i].Rows[i].Cells[l].FontSize;
                workbook.Sheets[i].Rows[i].Cells[l].FontSize = fontSize.HasValue ? fontSize : 12;


Under Review
Last Updated: 11 Nov 2019 10:34 by ADMIN
Scheduled for 2018.R1

In Internet Explorer version 11.418.18362.0, when hovering over the lower-right dot the cursor doesn't change to the expected cross-hair. 


To Reproduce:

1. Open IE11

2. Navigate to the ASP.NET Spreadsheet Demo

3. Highlight a few cells

4. Hover the cursor over the lower-right dot

Expected Behavior:

The cursor changes to a thin cross-hair icon but it doesn't change in IE 11.

Last Updated: 24 Apr 2020 10:02 by ADMIN
There are no issues when the user makes changes to the imported Blank XLSX document.
Last Updated: 06 May 2020 15:13 by ADMIN
Release R2 2020

Workaround: Placing the following script under the ScriptManager

        kendo.spreadsheet.registerEditor('_validation_list', function () {
            var context, list;
            function create() {
                var $list = $("[id$='SpreadsheetListBoxDropDown']").first();
                var element = $list.closest(".rssPopup");

                list = $find($list.attr("id"));
                if (!this._listdropdown) {
                    var dropdown = new kendo.spreadsheet.DropDown(element);
                    this._listdropdown = dropdown;

                    list.add_selectedIndexChanged(function (sender, args) {
                        var item = list.get_selectedItem();
                        if (item) {

            function open() {
                var matrix = context.validation.from.value;
                if (matrix) {

                    var items = list.get_items();
                    matrix.each(function (el) {
                        var item = new Telerik.Web.UI.RadListBoxItem();
            return {
                edit: function (options) {
                    context = options;
                icon: 'p-icon p-i-arrow-60-down'


Last Updated: 11 Jun 2020 16:18 by ADMIN
Last Updated: 23 Oct 2020 09:32 by ADMIN
Release R3 2020
Created by: Mamallan
Comments: 1
Category: Spreadsheet
Type: Bug Report

The issue is replicated when the spreadsheet is higher than the screen height. To reproduce it, scroll the page and click the last visible cell. 

Result: The page is scrolled to the beginning of the Spreadsheet element

Expected: The page is not scrolled

<telerik:RadSpreadsheet runat="server" ID="RadSpreadsheet1" Height="2000px" Width="100%">


Last Updated: 13 Jul 2020 10:20 by ADMIN
Created by: Mamallan
Comments: 0
Category: Spreadsheet
Type: Bug Report

Link is not clickable when situated in a disabled cell.

Steps to reproduce.

1. Place a link in a cell or a range of cells

2. Disable the cell (range)

3. Click the link

Last Updated: 21 Nov 2016 11:20 by Anton
Last Updated: 21 Apr 2017 14:10 by ADMIN
Last Updated: 30 Nov 2017 10:16 by ADMIN
Created by: Peter Milchev
Comments: 0
Category: Spreadsheet
Type: Bug Report
Expected: (as in the Kendo Spreadsheet

Actual: (the tooltip is not visible)

Add the styles for the tooltip from the Kendo Spreadsheet

html body .RadSpreadsheet .k-tooltip {               

    border-radius: 4px;
    background-image: none, linear-gradient(rgba(255, 255, 255, 0.6) 0px, rgba(255, 255, 255, 0) 100%);
    background-color: rgb(234, 232, 232);
    color: rgb(49, 49, 49);
    box-shadow: rgba(0, 0, 0, 0.3) 0px 4px 6px;
    background-position: 50% 50%;
    border-color: transparent;
    z-index: 12000;
    min-width: 20px;
    text-align: center;
    border-style: solid;
    border-width: 0px;
    padding: 5px 5px 5px 6px;
    background-repeat: repeat-x;
Last Updated: 17 Apr 2019 14:23 by ADMIN
Created by: JF
Comments: 0
Category: Spreadsheet
Type: Bug Report
When I load the radspreadsheet from an excel file, the foreground color is not loaded.

A workaround is to use the Kendo Spreadsheet widget directly which imports fore color:

Repro steps 
    go to
    add some text with specific fore color
    save the excel file
    import the excel file

Expected: there is no change

Actual: the fore color is not imported. Also, font size changes, but see the related item for that
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