Last Updated: 22 Apr 2019 13:10 by ADMIN
I have a few instances where I need OnClientSelectedIndexChanging inorder to stop the listbox selectedIndexChanged event from posting back in certain cases. In those cases I stop it from posting back by setting the e.set_cancel(true);

function CheckForListBoxReorder_OnClientEvent(sender, e) {
    if (ListboxReordered()) {
        alert('Please save changes to the bus order.');

This works very nicely, but I'm getting many errors because although it looks like it's still selected to the proper row in the listbox the selectedIndex is now -1.
Pending Review
Last Updated: 19 Apr 2019 13:20 by Jon
RadCodeBLock and RadScriptBlock is not able to handle the server tags for all case scenarios, hence RadAjaxManager throws the exception mentioned in the title.
Last Updated: 19 Apr 2019 09:41 by ADMIN

Using CommandItemTemplate (Grid - Command Item) for Editing DetailTable records and selecting an item after filtering or from another page, one item from the first page is put for editing instead. Open the attached GIF animation (EditSelectedEditWrongItem.gif) to see it in action.


Currently the workaround we offer is to handle the EditSelected command manually for all the DetailTables Except for the Master.


Grid markup:


        <telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" Width="100%" PageSize="3"
            <MasterTableView Name="MasterTable" AutoGenerateColumns="true" DataKeyNames="OrderID">
                    <telerik:GridTableView Name="ChildTable" DataKeyNames="OrderID" AutoGenerateColumns="true" CommandItemDisplay="Top">
                            <asp:LinkButton ID="btnEditSelected" runat="server" CommandName="EditSelected" CssClass="btn btn-default">Edit Selected</asp:LinkButton>
                <Selecting AllowRowSelect="true" />


C# - ItemCommand


    protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)
        // Logic applies for all the tables (detail tables) which are not named "MasterTable"
        if(e.Item.OwnerTableView.Name != "MasterTable" && e.CommandName == RadGrid.EditSelectedCommandName)
            e.Canceled = true;

            GridTableView detailTable = e.Item.OwnerTableView;

            if (detailTable.OwnerGrid.SelectedIndexes.Count == 0)

            foreach (GridDataItem selectedItem in detailTable.OwnerGrid.SelectedItems)
                selectedItem.Edit = true;



VB - ItemCommand

Protected Sub RadGrid1_ItemCommand(ByVal sender As Object, ByVal e As GridCommandEventArgs)
    If e.Item.OwnerTableView.Name <> "MasterTable" AndAlso e.CommandName = RadGrid.EditSelectedCommandName Then
        e.Canceled = True
        Dim detailTable As GridTableView = e.Item.OwnerTableView

        If detailTable.OwnerGrid.SelectedIndexes.Count = 0 Then
        End If

        For Each selectedItem As GridDataItem In detailTable.OwnerGrid.SelectedItems
            selectedItem.Edit = True

    End If
End Sub

Last Updated: 19 Apr 2019 05:50 by ADMIN
ImageEditor keeps in the undo stack a reference to the last written text, but not last inserted one. 


Steps to reproduce:

1. Open
2. Click the add text tool and insert "One"
3. Click the add text tool and insert "Two"
4. Click the add text tool, write "Three" and cancel/close the dialog
5. Click "Undo"
6. Click "Redo"
Result: The last written "Three" string is inserted instead of the expected "Two"

Last Updated: 18 Apr 2019 11:21 by ADMIN
Code snippets coming after remove table style from insert table popup in chrome,ie,ff.

I am facing a big problem in editor please give any solution.


Steps to reproduce

Step 1

Try to insert table from Insert Table from editor toolbar.

Step 2

Right click on cell then click on Table/cell properties. A table wizard popup will come.

Step 3

Click on Table Layouts tab on the table wizard popup.

Step 4

Select any value from table styles drop down.

Step 5

Now you can see  TABLE>TR>TD>RemoveElement on the bottom of the on RemoveElement .

After click on RemoveElement you can see STYLE>RemoveElement  again click on RemoveElement.

then you can see like below in the editor.

.telerik-reTable-2 { border-collapse: collapse; border: solid 0px; font-family: Tahoma; } .telerik-reTable-2 tr.telerik-reTableHeaderRow-2 { border-width: 1.0pt 1.0pt 3.0pt 1.0pt...........
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: 17 Apr 2019 15:54 by ADMIN
Created by: Vladimir
Comments: 1
Category: CloudUpload
Type: Bug Report
The RadCloudUpload doesn't handle correctly situation, when the communication between client and server becomes disconnected - the client side doesn't get notified (the upload keeps spinning).
All the details and steps to reproduced are in the following thread:
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
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
Last Updated: 17 Apr 2019 14:19 by ADMIN
Hello guys,


We've faced an issue with menu on several RAD controls when running on MacOS 10.14.x (Mojave) with FireFox 66.0.x (Quantum).

Using touchpad or mouse, when right clicking for context menu, it just flashed and doesn't stay open: it opens and then suddenly closes.

We are using Telerik Asp.Net Ajax version 2017.2.503.40 but it can be also replicated on your demo version:

Not sure if you can provide a fast workaround for this but I just wanted to let you know.

I've checked for some open cases before creating this thread and hope I didn't duplicate something. Please move/close it if necessary.



Andrei V.
Last Updated: 17 Apr 2019 13:57 by ADMIN
<telerik:RadMaskedTextBox ID="txtCountryDigits" runat="server" SelectionOnFocus="CaretToBeginning" PromptChar="_" Width="50px" Mask="+###" ValidationExpression="+\d{1}.d{1}.d{1}" MaxLength="4" />
<telerik:RadMaskedTextBox ID="txtPhoneNumber" runat="server" SelectionOnFocus="CaretToBeginning" PromptChar="_" Width="116px" Mask = "(###) ###.####" ValidationExpression = "\(\d{3}\) \d{3}\.\d{4}" />
<telerik:RadMaskedTextBox ID="txtExtension" runat="server"  SelectionOnFocus="CaretToBeginning" PromptChar="_" Width="100px" Mask="x##########" MaxLength="11" />

This only affects the Edge browser as far as I can tell.

The Country Digits and Extension only allow one character to be entered when the MaxLength is set equal to the number of characters in the mask.  You can only enter 1 character if you tab into the control.  Click on the control with the cursor does not allow the entry of any digits.   Removing the MaxLength property allows entry of the full input.
Last Updated: 17 Apr 2019 08:29 by ADMIN
Created by: JF
Comments: 3
Category: Spreadsheet
Type: Bug Report
The lines shifts badly after line 10 

You think you are on line 17  but the cursor is on line 16.  Very annoying bug for those using this control.  Please fix and give us an update.

Look the attached file.
Last Updated: 16 Apr 2019 15:58 by ADMIN
I skipped the 3rd quarter 2016 update (2016.3.1027) for my copy of Telerik UI for ASP.NET.AJAX, since we were in code lock down at that time. 

 Later i installed the 4th quarter version (2016.4.1021.0)

Now, I still get a notice to install the previous version  (2016.3.1027) that I skipped.

That's annoying, and probably not possible. Right?

Is there anything we can do about this situation?

Thanks in advance
Tommy Heath
Last Updated: 16 Apr 2019 15:51 by ADMIN
Created by: Igor
Comments: 2
Category: TagCloud
Type: Bug Report
When Telerik CDN is enabled, the RadTagCloud control is not able to get (error 404)
href=" href="
Under Review
Last Updated: 16 Apr 2019 15:43 by ADMIN
Created by: JF
Comments: 1
Category: Spreadsheet
Type: Bug Report
I have two lines that was set to a certain height,

Each time I save the sheet, those two lines expand by 8 pixels.

Does anyone are reading those bug reports?
Last Updated: 13 Apr 2019 08:35 by ADMIN
The RadTooltip and RadTooltipManager do not display tooltips like the default browser tooltips, if the tooltips are "nested".

Consider HTML like this

My name is <span class="app" title="Person Tooltip">Mathyß<a class="noteLink criticalRight" id="RqoTeiLink_a" title="Der Notelink Tooltip"><sup>a</sup></a> Schwertzenbachen</span>, and I live somewhere. 

If you tooltipify this HTML then only the "outer" tooltip is displayed all the time. When using just the browser, then it displays correctly the "inner" tooltip when you hover over the link.

As the behaviour is not consitent with the browser (and other Tooltip libraries) this should be fixed.
Last Updated: 12 Apr 2019 16:50 by ADMIN
Created by: Wei Dong
Comments: 1
Category: Ajax
Type: Bug Report
Hi guy,

      I want use alert function in radajaxmanager,  After i  set  radajaxmanager.alert, if code is running it ,page will pop-up a window. but this window is not middle positon in current page.
How can i  solve this question.thanks.

Won't Fix
Last Updated: 12 Apr 2019 16:40 by ADMIN
Created by: Ianko
Comments: 1
Category: FormDecorator
Type: Bug Report
The tooltip is not showing when RadFormDecorator decorate asp:CheckBox and asp:RadioButton. For example:

<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" />
<asp:CheckBox runat="server" Text="Update" ToolTip="Update Last Name" />
<asp:RadioButton runat="server" Text="Update" ToolTip="Update Last Name" />


Removing the title attribute from the label element fixes the issue: 

<telerik:RadScriptManager runat="server" ID="RadScriptManager1">
        <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
        <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" />
<script type="text/javascript">
    function pageLoad() {
<asp:CheckBox runat="server" Text="Update" ToolTip="Update Last Name" />
<asp:RadioButton runat="server" Text="Update" ToolTip="Update Last Name" />
Last Updated: 12 Apr 2019 16:34 by ADMIN
Created by: YOUNGKON
Comments: 3
Category: FormDecorator
Type: Bug Report
After upgrading to new version of Telerik (2016.3.914.35), duplicate checkboxes are displaying. Please refer attached file.
Last Updated: 12 Apr 2019 16:28 by ADMIN
Created by: Othmanee
Comments: 2
Category: Window
Type: Bug Report
The control RadWindow render his element with incorrect names of css classes:
like he rendered rwTitleBar instead of rwTitlebar, and rwStatusBar instead of rwStatusbar
this bug is produced only when i  use a custom theme. 
please if you have a solution bring that.
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