Last Updated: 20 Mar 2019 15:22 by ADMIN

<telerik:RadNumericTextBox ID="RadNumericTextBox2" runat="server" MaxValue="9223372036854775807" Value="545445456456465454">
    <NumberFormat AllowRounding="false" DecimalDigits="0" />

MaxValue property is set to use the maximum value of int64: 9223372036854775807

Original value introduced is: 545445456456465454

Value becomes:  545445456456465000

Last Updated: 20 Mar 2019 15:21 by ADMIN
Created by: Andy
Comments: 1
Category: Scheduler
Type: Bug Report
Using the following setup, resize the appointment so that when releasing the mouse, it is over the appointment as demonstrated in the attached video with the attached project.

<telerik:RadScheduler RenderMode="Lightweight" Font-Size="14px" runat="server" ID="RadScheduler1"

    function OnClientAppointmentResizeEnd(sender, args) {
    function OnClientAppointmentClick(sender, args) {

private const string ProviderSessionKey = "Telerik.Web.Examples.Scheduler.XmlSchedulerProvider.DefaultCS";
    // You can safely ignore this method.
    // Its purpose is to limit the changes to the underlying data only to the active user session.
    protected void Page_Init(object sender, EventArgs e)
        Telerik.Web.UI.XmlSchedulerProvider provider;
        if ((Session[ProviderSessionKey] == null) || (!IsPostBack))
            provider = new Telerik.Web.UI.XmlSchedulerProvider(Server.MapPath("~/App_Data/Appointments.xml"), true);
            Session[ProviderSessionKey] = provider;
            provider = (Telerik.Web.UI.XmlSchedulerProvider)Session[ProviderSessionKey];
        RadScheduler1.Provider = provider;

Last Updated: 20 Mar 2019 14:26 by ADMIN
When there is at least one ColumnGroup which is not assigned to any of the columns in RadGrid, exporting to Excel throws an exception "Index was outside the bonds of the array"
Last Updated: 20 Mar 2019 14:14 by ADMIN
Created by: Richa Chauhan
Comments: 1
Category: Grid
Type: Bug Report
Keyboard navigation does not work in Firefox 65.0.1

While attempting to implement Keyboard Navigation for one of our RadGrid controls, we discovered that this navigation (Arrow Up/Down and Page Up/Down) did not work correctly in Firefox (though it did within IE, Edge, and Chrome). We also tested the Firefox Keyboard Navigation within the Telerik Grid Demo Site, and experienced the same behavior. 

Issue can also be observed with the Grid - Keyboard Support demo using Firefox 65.0.1

Do you know how to resolve this issue, or of any workaround?

Thank you,

Last Updated: 20 Mar 2019 12:31 by ADMIN
Created by: Victor
Comments: 2
Category: Editor
Type: Bug Report


The RadEditor's Design View became unusable in the latest Chrome Beta version (Version 73.0.3683.27). It is still working correctly on the latest stable Chrome 72, so I'm not sure if it is a problem that needs to be resolved on Chrome's end, just figured it'll be helpful to send this in as well. 

The HTML view still works, but switching back to Design causes an exception (attached). This is also directly off of the demo page, so it doesn't look like implementation is a factor. 

Last Updated: 20 Mar 2019 11:13 by ADMIN
Created by: Petar
Comments: 3
Category: UI for ASP.NET AJAX
Type: Bug Report

Last Updated: 19 Mar 2019 14:51 by ADMIN
Last Updated: 19 Mar 2019 14:39 by ADMIN
Created by: msigman
Comments: 2
Category: HtmlChart
Type: Feature Request
When using custom shapes (circles, triangles, etc) in a RadHtmlChart, the custom shape should be displayed in the legend instead of always a square.  This is because when printing with a black & white printer, the colored squares won't help the reader read the chart, however the shapes would.
Won't fix
Last Updated: 19 Mar 2019 14:26 by ADMIN
Load in IE this demo:

Enter in HTML mode - <p><a href="stm:b4f0c9ac-9a08-4c9f-8caf-39ccd4a83fc9" class="stm" contenteditable="false">Statement 111</a></p>

Switch to Design mode

Search for Statement with the Find and Replace dialog

The dialog won't be able to locate and highlight the link
Last Updated: 19 Mar 2019 14:23 by ADMIN
Created by: Peter Milchev
Comments: 0
Category: ImageGallery
Type: Bug Report

Last Updated: 19 Mar 2019 14:19 by ADMIN


  1. Create a page with a basic Rad Editor, with HTML mode enabled
  2. Go into HTML Mode, add at least the following:
    <input type="number" />
  3. Go back to Design Mode
  4. Click on the numeric input

To See the Problem:

  1. In the console of the Browser's Developer Tools, get a reference to the Rad Editor
  2. Call its getSelectedElement() function
  3. In Chrome, the returned element will be a <body> tag (NOT GOOD)
  4. In Firefox, it will be an apparently random (maybe the first?) user-selectable element within the HTML (NOT GOOD)
  5. In IE11, it will be the numeric input (DESIRED)
  6. In Edge, it will be a <body> tag (NOT GOOD)
Last Updated: 19 Mar 2019 14:14 by ADMIN
Created by: msigman
Comments: 2
Category: HtmlChart
Type: Feature Request
When viewing a line chart with multiple series, the RadHtmlChart automatically changes shapes for each series to make it easy to distinguish, however the shapes are not carried over to the legend.  This means a user printing on a black & white printer will have no way to distinguish the different series (since the shapes are not in the legend).
Last Updated: 19 Mar 2019 09:08 by ADMIN
Bug introduced in build 2019.1.115+ causes 3 extra <p>&nbsp;</p> when user presses Enter key in FireFox.  Happens when Editor is in a Wizard with more than one step.  Bug does not occur in builds prior to 2019.1.115.

Try this to reproduce:

 <telerik:RadWizard runat="server" ID="rwMain" BorderStyle="Solid" BorderColor="LightGray" BorderWidth="1px" RenderMode="Lightweight" DisplayNavigationButtons="True">
            <telerik:RadWizardStep ID="RadWizardStep2" Title="Content Template" StepType="Step">
            <telerik:RadWizardStep ID="RadWizardStep3" Title="Content Editor" StepType="Step">
                <telerik:RadEditor ID="ContentEditor" runat="server" RenderMode="Lightweight"></telerik:RadEditor>
Last Updated: 19 Mar 2019 08:39 by ADMIN
The filter expression that we build should use ToUpperCase in the build expresssion.
Last Updated: 18 Mar 2019 15:39 by ADMIN
Currently the available appearance options of the line in Area, Line and ScatterLine Series are width and background color. Expose additional option for changing the dash type(e.g. dash, dashDot, Dot, etc). For the time being the following workaround can be used:
			function pageLoad() {
				var chart = $find("<%=RadHtmlChart1.ClientID%>");
				//DashType: dash, dashDot, dot, longDash, longDashDot, longDashDotDot, solid
				chart._chartObject.options.series[0].dashType = "dot";
		<telerik:RadHtmlChart ID="RadHtmlChart1" runat="server" Width="600px" Height="400px">
					<telerik:LineSeries Name="Series 1">
							<telerik:CategorySeriesItem Y="30" />
							<telerik:CategorySeriesItem Y="10" />
							<telerik:CategorySeriesItem Y="20" />
						<telerik:AxisItem LabelText="item 1" />
						<telerik:AxisItem LabelText="item 2" />
						<telerik:AxisItem LabelText="item 3" />
Last Updated: 18 Mar 2019 12:47 by ADMIN

This can be reproduced with the following sample:

<telerik:RadWindow runat="server" ID="RadWindowWithEditor" Height="1000px" OnClientShow="fixEditor"
        <telerik:RadEditor RenderMode="Lightweight" runat="server" ID="RadEditor1" Width="700px" Height="700px">
Lorem ipsum dolor sit amet
<asp:Button ID="Button5" Text="open the RadWindow" runat="server" />
<script type="text/javascript">
    function fixEditor() {
        setTimeout(function () {
            $find("<%=RadEditor1.ClientID %>").onParentNodeChanged();
        }, 100);


Last Updated: 18 Mar 2019 12:47 by ADMIN
We've a RadEditor controls, we want disable editting in mobile render mode. How can we do it?

Here examle:

Case 1. RadEditor is LightWeight:

<telerik:RadEditor ID="redEdt" runat="server"    RenderMode="LightWeight"     Width="100%" Height="500px" ></telerik:RadEditor>

                $(document).ready(function () {
                    var editor = $telerik.findControl(document.documentElement, "redEdt");


--> It work great. All buttons in toolbar disabled.

Case 2. RadEditor is Mobile:

<telerik:RadEditor ID="redEdt" runat="server"    RenderMode="Mobile"     Width="100%" Height="500px" ></telerik:RadEditor>

                $(document).ready(function () {
                    var editor = $telerik.findControl(document.documentElement, "redEdt");


--> System error: 

M.enableContextMenus is not a function
    at c.RadEditor.enableEditing
Last Updated: 18 Mar 2019 10:15 by ADMIN
Issue can be replicated using the following Grid settings:

  • Wire up the onCommand client-side event to the grid
  • Set the excel format to Biff
  • Set the RenderMode to Lightweight
  • Enable Sorting

<telerik:RadGrid ID="RadGrid2" runat="server" RenderMode="Lightweight" AllowSorting="true">
        <Excel Format="Biff" />
        <ClientEvents OnCommand="onCommand" />
    <MasterTableView AutoGenerateColumns="True" CommandItemDisplay="Top">
        <CommandItemSettings ShowExportToExcelButton="true" />
Last Updated: 16 Mar 2019 13:39 by ADMIN
Created by: Massimiliano
Comments: 50
Category: UI for ASP.NET AJAX
Type: Feature Request
Bootstrap popularity is growing each day, not just as a flexible grid system, but for it's skinning capabilieties as well. There are dozens of sites with both free and priced Bootstrap skins..
It would be nice to have a skin for rad controls wich maps straight to default Bootstrap classes.
So that just using the bootstrap skins (+ base Telerik controls skin) will also theme the rad controls and changing the Bootstrap themes of course changes the controls theming.

I guess that option to have a "straight" mapping of the rad controls to the bootstrap default classes so to be able to take advantage of bootstrap themes would be a great addition.

Updated by Telerik admin on 10.4.2017:
The status of this highly demanded feature has been updated to Declined, but you can find details what has been done during the years for satisfying this request:

Since the markup of the controls does not offer direct mapping for the Bootstrap v3 and v4 themes and classes, we introduced a new Bootstrap skin for the suite based on Bootstrap 3 component colors, metrics and appearance. This skin can be easily customized in the Theme Builder ( in terms of colors which allows you to create Bootstrap like appearance for Telerik Ajax components which matches the colors of your Bootstrap apps and components.

If you have any other requests for Bootstrap, don't hesitate to share them with us.
In Development
Last Updated: 16 Mar 2019 13:27 by ADMIN
Created by: Danail Vasilev
Comments: 4
Category: Button
Type: Feature Request
You can configure the confirm dialog through a ConfirmText property that defines the confirmation text. The boolean result can be exposed in the arguments of the click event. If there is a RadWindowManager on the same page a radconfirm should be used otherwise - the browser one.

For the time being the functionality can be achieved manually as illustrated in this demo -