Last Updated: 02 Apr 2020 16:32 by ADMIN
Last Updated: 26 Mar 2020 10:03 by ADMIN
The loaded into the ImageEditor image is not downloaded with its original extension if a query string is added to the end of the image name. It is saved as PNG instead:
Steps to reproduce:
1. Run the code below and open the SaveImage dialog
2. Chose the "Download image" option and click OK
 Result: The image is downloaded as PNG
         <telerik:RadImageEditor RenderMode="Lightweight" ID="RadImageEditor1" runat="server"
            ImageUrl="~/images_1/test.jpg?test123" Width="100%" Skin="Silk">
Last Updated: 27 Mar 2020 09:43 by ADMIN
Created by: RUSHABH
Comments: 1
Category: UI for ASP.NET AJAX
Type: Feature Request

We are looking for an option/rad control to have outlook or msg attachment. We have outlook emails with attachment within it. The attachment can vary from PDF, WORD, Outlook Message, Images, and more. The attachment also includes the signature or sensitive data. Currently, we are using a redemption library for an MSG attachment. We would like to know if Telerik offers a solution like redemption we can try. Redemption has a lot of issues. So we are looking for an alternative. Can you please provide an option for MSG attachment? 

Last Updated: 24 Mar 2020 17:28 by ADMIN

Images in a RadEditor can be resized two ways:

1. Using the image properties dialog and keying in width/height. The aspect ratio can be locked here so that keying in width updates height accordingly, and vice versa.

2. Clicking and dragging the resize handles. This does not maintain the aspect ratio of the image, even when the aspect ratio lock option is enabled in the image properties dialog.

Request: That the image aspect ratio lock option in the image properties dialog applies when dragging the resize handles.

Last Updated: 16 Mar 2020 07:46 by ADMIN
There are no issues when the user makes changes to the imported Blank XLSX document.
Last Updated: 13 Mar 2020 09:13 by ADMIN

Add ability to define common layout template for the ImageGallery LightBox popup, allowing to define common layout for all image items (including buttons, toolbar, etc.)

Last Updated: 09 Mar 2020 14:38 by ADMIN
Created by: Van
Comments: 0
Category: FileExplorer
Type: Bug Report
The folder pane scrolling position is not persisted when the first child folder is selected.
Steps to reproduce:
1. Open https://demos.telerik.com/aspnet-ajax/fileexplorer/examples/overview/defaultcs.aspx
2. Add several folders to the last node
3. Scroll down to the bottom and select the first child folder of the last node
Result: The tree is scrolled to top.
Last Updated: 06 Mar 2020 13:09 by ADMIN
Created by: Dan
Comments: 0
Category: Editor
Type: Bug Report

When opening in MS Edge the Table Wizard, the items in Table Layouts tab, Select Table Style dropdown are not populated



As a temporary workaround, you can use the attached script and loaded to the DialogsScriptFile property of the Editor:

<telerik:RadEditor runat="server" DialogsScriptFile="~/dialogscript.js"></telerik:RadEditor>


Last Updated: 05 Mar 2020 16:32 by ADMIN
The horizontal scrollbar is not visible in iOS when the grid is empty.

Code to reproduce the problem:
        html, body, body > form {
            height: 100%;
            padding: 0;
            margin: 0;
        <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" Width="100%"
                <Scrolling AllowScroll="true" />
            <MasterTableView Width="1500px">

    protected void RadGrid1_NeedDataSource(object sender, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
        (sender as RadGrid).DataSource = GetData();

    private object GetData()
        DataTable dt = new DataTable();

        //dt.Rows.Add(1, 2, 3, 4, 5, 6, 7, 8);

        return dt;
Last Updated: 05 Mar 2020 10:34 by ADMIN
Created by: david
Comments: 0
Category: MediaPlayer
Type: Feature Request

Provide keyboard support for the MediaPlayer.

Some of the occurring problems are:

  • It is not clear how to get focus on the control, we assigned an accesskey="T" but  alt-t doesn't give focus (we have  a radmenu on the same page with an accesskey="M" which works fine)
  • The tab key sometimes does not work.

Keyboard navigation is required for 508 accessibility support. Generally the space bar is used to start/stop video and tabs are used to access the playbar features like expand, vol and CC

Last Updated: 04 Mar 2020 12:47 by ADMIN

When items with different values have the same text, a postback is not triggered when selecting another item with the same text as the current selection. The workaround is to place the following script under the ScriptManager:

Telerik.Web.UI.RadMultiColumnComboBox.prototype._shouldPostbackOnChange = function myfunction() {
    return true;

Reproduction code:

<telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox1" DataKeyNames="Additional" runat="server" DropDownWidth="Auto" AutoPostBack="true" >
    <ClientEvents OnSelect="OnSelect" />
        <%--<telerik:MultiColumnComboBoxColumn Field="ID"></telerik:MultiColumnComboBoxColumn>--%>
        <telerik:MultiColumnComboBoxColumn Field="Name"></telerik:MultiColumnComboBoxColumn>
        <telerik:MultiColumnComboBoxColumn Field="Additional"></telerik:MultiColumnComboBoxColumn>
    function OnSelect(sender, args) {
        //alert("selection changed");
    // Workaround
    Telerik.Web.UI.RadMultiColumnComboBox.prototype._shouldPostbackOnChange = function myfunction() {
        return true;

public class MyClass
    public int ID { get; set; }
    public string Name { get; set; }
    public string Additional { get; set; }
protected void Page_Load(object sender, EventArgs e)
    if (!IsPostBack)
        RadMultiColumnComboBox1.DataSource = Enumerable.Range(1, 20).Select(x => new MyClass()
            ID = x,
            Name = "Same Item text" ,
            Additional = "DataKey#" + x
        RadMultiColumnComboBox1.DataTextField = "Name";
        RadMultiColumnComboBox1.DataValueField = "ID";



Last Updated: 04 Mar 2020 10:46 by ADMIN
Created by: Christian
Comments: 0
Category: Theme Builder
Type: Feature Request

Missing controls are: 

  • PivotGrid
  • MultiColumnComboBox
  • MultiSelect
  • Drawer
  • Chat
  • PdfViewer
Last Updated: 28 Feb 2020 14:10 by ADMIN

Replicated when the ClickToOpen is enabled: 

protected void Page_Load(object sender, EventArgs e) { RadGrid1.HeaderContextMenu.ClickToOpen = true; }

WORKAROUND: Loading the following script under the script manager

    var original = Telerik.Web.UI.GridColumn.prototype._onContextMenuItemClicking;
    Telerik.Web.UI.GridColumn.prototype._onContextMenuItemClicking = function (sender, args) {
        original.call(this, sender, args);
        var item = args.get_item();
        var itemValue = item.get_value();
        if (itemValue == "FilterList" || itemValue == "FilterMenuContainer" ||
            itemValue == "AggregatesContainer" || itemValue == "FilterMenuParent" || itemValue == "ColumnsContainer" ||
            (Telerik.Web.UI.RadMenuItem.isInstanceOfType(item.get_parent()) && item.get_parent().get_value() == "ColumnsContainer")) {
            if (sender.get_clickToOpen()) {





Last Updated: 05 Mar 2020 15:34 by ADMIN

I am using a component (GoogleMapControl) that inherit IExtenderControl . when i add it in to radajaxmanager updated controls or if i use it in dynamically loaded usercontrol by RadTab & RadMultiPage i am getting error of Unable to cast object of type 'GoogleMaps.Markers.GoogleMarkers' to type 'System.Web.UI.ExtenderControl'.

When i check the error detail by AsyncPostBackError event, i found that error comes from Telerik.Web.UI.ProxyScriptControl.GetChildScriptDescriptorsRecursive(Control parent, ArrayList scriptDescriptors).

Someones lived same problem old but same... As in https://dnntracker.atlassian.net/browse/DNN-25819

Last Updated: 24 Feb 2020 09:42 by ADMIN

We are using CDN and combined scripts as much as possible, and have run into an issue with the RadEditor and applying custom CSS Classes break, e.g. the applied CSS class on the selected content gets stripped for example from 





Last Updated: 21 Feb 2020 11:29 by ADMIN
Created by: n/a
Comments: 1
Category: Editor
Type: Feature Request
Are there any plans to introduce Word-compatible comments, which can be viewed in Word using the "review" Office functionality? Or at least the ability to preserve comments after exporting to Word and then back to html?
In Development
Last Updated: 26 Feb 2020 16:10 by ADMIN
Scheduled for R2 2020

ConvertWordLists errors out when pasting bullets in a nested table inside another table from Word. 

Test with the attached word doc in the https://demos.telerik.com/aspnet-ajax/editor/examples/cleaningwordformatting/defaultcs.aspx demo and you'll get the following error:

RadEditor.js:17416 Uncaught TypeError: Cannot read property 'appendChild' of null
    at b.WordListConverter.insertList (RadEditor.js:17416)
    at b.WordListConverter.convert (RadEditor.js:17570)
    at Object.convertWordLists (RadEditor.js:257)
    at Object.cleanPastedContent (RadEditor.js:146)
    at c.RadEditor._onAfterPaste (RadEditor.js:10229)
    at c.RadEditor.afterPasteDelegate (Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_QsfScriptManager_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d4.0.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aen-US%3ad28568d3-e53e-4706-928f-3765912b66ca%3aea597d4b%3ab25378d2:6)


Last Updated: 20 Feb 2020 09:10 by ADMIN
Created by: Orit
Comments: 1
Category: UI for ASP.NET AJAX
Type: Feature Request

Hi , 

Why is your combobox does not support BOTH multiple select AND LoadOnDemand ?

It would be so convenient to have .

I see a lot of questions like that, but all the answers explain why its not supported.

I tried all other recommendations ( like using RadAutoCompleteBox or searchbox ) , but it's not displaying any items in the drop down list ,so the user has to know what he is looking for, withuy having ability to select it from the list. 

PLEase let me know if you have ANY Telerik control which allows both features .

If you do not have , I would like to submit a feature request for that .

I really do not care what control it will be .

All i need is to be able to select from the list ( with option to select all ) , OR to start typing , and then it will prompt for a matches .

Thanks ,





Pending Review
Last Updated: 27 Feb 2020 12:39 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: 17 Feb 2020 15:08 by ADMIN
Endless Loading screen is shown over RadPane when the set_showContentDuringLoad(false) method before changing the contentUrl of a RadPane (which is already showing another external page).

Workaround: Set the ShowContentDuringLoad="false" property of the RadPane in the markup initially


Code to reproduce the bug:

            function loadNewPage() {
                var contentPane = $find("RadPane2");
        <telerik:RadSplitter ID="RadSplitter1" runat="server" Width="100%" Orientation="Horizontal" Height="800px">
            <telerik:RadPane ID="RadPanel1" runat="server" Height="30px">
                <asp:Button Font-Italic="true" runat="server" Text="Load New Page" OnClientClick="loadNewPage(); return false;" />
            <telerik:RadPane ID="RadPane2" runat="server" ContentUrl="https://www.wikipedia.com">

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