Last Updated: 10 Apr 2020 17:57 by Philip Thorne
Release R1 2020 SP1
Some HtmlChart appearance properties are not fully applied in R1 2020 (e.g. XAxis.MajorGridlines="false", ChartTitle.Appearance.TextStyle.Font, etc.)
Temporary workaround:
            var datavizThemes = kendo.dataviz.ui.themes || {};
            Telerik.Web.UI.RadHtmlChart.prototype.applyTheme = function () {
                var that = this,
                 kendoWidget = that.get_kendoWidget(),
                 themeName = kendoWidget.options.theme,
                 theme = datavizThemes[themeName];
                if (theme && theme.chart) {
Last Updated: 08 Apr 2020 17:23 by ADMIN
Created by: mkerchenski
Comments: 1
Category: Editor
Type: Feature Request
Right now if copy multiple table rows and paste them into an existing table they create a new table in that table.  We would like the ability to copy rows from a table and paste them into the same table or a new table with the same number of columns and have the new rows pasted without the creation of a nested table.
Last Updated: 08 Apr 2020 16:24 by ADMIN
Created by: Erik
Comments: 1
Category: Grid
Type: Feature Request
I would like to get a visual indiation on the grouppanel of the RadGrid for column which are not allowed to group on.

Forum reference:
Last Updated: 08 Apr 2020 16:18 by ADMIN
When Grouping in RadGrid while EnableLinqExpressions is set to True and some of the records contain null values will throw the exception: Object cannot be cast to DBNull
Last Updated: 08 Apr 2020 16:15 by ADMIN
When exporting to Excel XLSX while there are hidden columns at the end of the columns collection and an unused ColumnGroup, the application throws the exception of: Index was out of range. Must be non-negative and less than the size of the collection
Last Updated: 08 Apr 2020 16:14 by ADMIN

If the Page culture is set to anything other than "en-US", RadDatePicker in the HeaderContextMenu will loose the correct format and swaps the Day with the Month after filtering.

Last Updated: 08 Apr 2020 16:12 by ADMIN
Created by: Kasim
Comments: 2
Category: UI for ASP.NET AJAX
Type: Feature Request

Would like to show column grouping for a few columns in the RaddGantt.


  • Planned Start and Planned End to be grouped under Planned
  • Actual Start and Actual End to be grouped under Actual
  • Financial Detail columns to be grouped under Task Financials

Also, would like to add to the query, how can I have the Gantt chart with the dates shown vertically as in the image attached. 
I don't want the Week or Month name coming in the grouping. Just dates in the timeline view.

Last Updated: 08 Apr 2020 15:43 by ADMIN


For the date picker and it's family of controls (time picker, date time picker), when using bootstrap skin, lightweight rendering and RTL page, the buttons for the picker are displayed on the wrong side of the control (the right side) instead of being displayed on the left side. I know this can be fixed using some CSS but although the html controls are in order (text and then button both in a container with RTL), the button is stuck to the right side somehow

please advise

Last Updated: 08 Apr 2020 15:28 by ADMIN



I would like to highlight a GridLine based on a Labelled item when I have implemented skip in the HTML Chart. 


Essentially, I have a series of days and would like to step the labels on a weekly basis. At each step I would like to highlight the GridLine associated with the label.

Last Updated: 08 Apr 2020 15:23 by ADMIN
Created by: Tom
Comments: 1
Category: UI for ASP.NET AJAX
Type: Feature Request
As part of the Fall Creators update, Microsoft are releasing SDKs for their Fluent design system for UWP app design.

It would be great if Telerik could expand their skins to include controls designed to mimic the look and feel of the Fluent design including, where possible, Acrylic, Parallax, and Reveal.   I believe that light or dark themes will be standard on the Fluent design, but users will be able to incorporate the their accent colour preference.  So, at the least it would be great to have fluent light, and fluent dark skins with an easy method of similarly changing the accent colour.

Of course, not all of the functionality of UWP will be possible for ASP.NET AJAX, but since Fluent is likely to become the new standard for UWP app design, I believe that users will come to expect similar skins in their web-apps.

See for more info.
Last Updated: 08 Apr 2020 15:10 by ADMIN

Unable to open "columns" sub-menu inside RadGrid's HeaderContextMenu on mobile devices. It does work on desktop PCs regardless of the OS.

Issue can be replicated starting with the version 2019 R1. Not present on previous versions (2017 and 2018 were tested)


Last Updated: 08 Apr 2020 15:07 by ADMIN

If using Frozen Columns with MultiHeaders, where one column has many headers while the other fewer. Each header in a column occupies some space and they get hidden, this will cause the upper (header) portion of the Grid to change its size. With that, the scrollbar will move away from the mouse position and causes the scrolling jump back and forth resulting in flickering.

Demo video of the issue: RadGrid FrozenColumns Flickering Header. The video can be found in the attachments as well.


Last Updated: 08 Apr 2020 14:53 by ADMIN
In a GridDateTimeColumn I have some value data with milliseconds like "2018-09-24 18:05:21.057"

Filtering with the milliseconds returns no results.

Then I remove milliseconds part "2018-09-24 18:05:21"

Filtering without that will return results.

Even with the EnableTimeIndependentFiltering property set to True, the milliseconds are not ignored, and the filtering mechanism doesn't find the records.
Last Updated: 08 Apr 2020 14:52 by ADMIN

Issue #1. When the Grid is not having any records (i.e. when the grid is initialized for the first time), if we define the Detail Item Template than the item template is shown 10-11 times. 

Issue#2: When we have the pagination enabled in the grid and the records are fully filled on the first page and suppose the second page is half-filled with records, then in this scenario On the second page even the records of the first page are hidden but the data item template for those rows are visible which is not correct. Screenshot is attached.

Issue #3: The same scenario is happening when we searched the grid first with 10 records and then we search for 2 records, In this case also 8 records will be removed but there data item templates will still be visible on the grid.

Last Updated: 08 Apr 2020 14:28 by ADMIN

Hello @support!

Did you observe the behavior, that Firefox (v71.0 64bit) does not turn the rad grid into edit mode, whereas IE11, Edge, Chrome (v78) perfectly work ok on the same grid?

Clicking the edit stencil button only makes the two arrows below rotate for some seconds, but nothing happens. What could that be?

Video Demo is attached.

Thank you,

Last Updated: 08 Apr 2020 14:24 by ADMIN

With no filtering applied, the filter menu still highlights the filter-function defined in the CurrentFilterFunction property of the column.

Last Updated: 08 Apr 2020 14:20 by ADMIN
We have found a problem, which is that the filters do not seem to take the EnableEmbeddedBaseStylesheet settings from the Grid.
Last Updated: 08 Apr 2020 14:15 by ADMIN
Created by: Lee
Comments: 5
Category: Grid
Type: Feature Request
Can the RadGrid generate columns from the client data source schema, it's painful having to manually declare the columns both in the RadGrid and the schema, again can something be done to make this control more user friendly?
Last Updated: 08 Apr 2020 14:08 by ADMIN
Created by: Doug
Comments: 1
Category: ScriptManager
Type: Feature Request
When you pull in BootStrap there are additional attributes such as 'crossorigin="anonymous"  and integrity="...."  '
How can these be added to Script Manager and CSS manager?
Likewise, there would a separation between bootstraps layout and the skin that Telerik an provide. This gives the advantage of it being BootStrap compliant, but with all the skins that Telerik offer, making re-skinning easier. This is one of the biggest bug bares of designing a site with Telerik, is the post-production work on CSS by a third party, as its not 'standards compliant'  by which they mean its not like a normal Bootstrap site that they are familiar with.

<link rel="stylesheet" href= 


<link rel="stylesheet" href= 


<script src= 


Last Updated: 08 Apr 2020 14:07 by ADMIN
Created by: Mark
Comments: 2
Category: ComboBox
Type: Bug Report


Microsoft Edge 44.18362.449.0

Telerik Control:


Teleri Version:  Version=2017.3.913.45,


When a item is selected and a postback is occured, the SelectedValue returns an empty string.

Expected behavior:

The correct SelectedValue should be return.

Thing that have been tried so far:

1: upgrade the telerik to the latest version (2020.114) ---> issue persists

2: set autopostback to "true" problem solved

3: use other browsers (chrome, FireFox, new Version 79.0.309.68 ) issue disappears

Sample code: 

1: aspx

        onitemsrequested="ddlSupplier_ItemsRequested" autopostback="false">

2: code behind

protected void Page_Load(object sender, EventArgs e)
    protected void saveIssue_Click(object sender, EventArgs e)
    protected void ddlSupplier_ItemsRequested(object sender, Telerik.Web.UI.RadComboBoxItemsRequestedEventArgs e)
        RadComboBoxItem li = new RadComboBoxItem("Alan Jones (Brunel Systems Pty Ltd, test site)", "123");
         li = new RadComboBoxItem("Jackie Chiu (Optimum Construction, Optimum Construction (Sydney)) ", "23" );
         li = new RadComboBoxItem("Erik Baker (Optimum Construction, Optimum Construction (Sydney))", "2323");
    protected void b_Click(object sender, EventArgs e)
        var a = ddlSupplier.SelectedValue;  // most of the time returns "" for Edge





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