Last Updated: 30 Sep 2013 13:40 by Darren
Last Updated: 05 Mar 2015 08:48 by ADMIN
Our project  works fine with .Net 3.5  with Telerik 2009.2.701.35  version.

When it is migrated to .Net 4.5 framework.  
It throws error like this.
"0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 
Object reference not set to an instance of an object."

Detailed Error message is given.

Unhandled exception at line 3, column 69963 in http://localhost:57537/...../Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_DefaultMasterScriptManager_TSM&compress=1&_TSM_CombinedScripts_=;

0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 
Object reference not set to an instance of an object.

If there is a handler for this exception, the program may be safely continued.

So it is upgraded to Telerik  2013.1.417.45 version.  It is throwing  same error.  [Even tried with Latest Telerik AspnetAjax Q2 version is also throwing the same error]

I suspect that the error might be because the AjaxRadManager  and/or  skins which is implemented from  Telerik.Web.UI. Skins.dll  is causing the 
Last Updated: 13 Aug 2015 15:31 by Andre Light
Based on feedback received from our customer, we can further improve our TypeScript definitions - the main concern is that there are still missing methods and incorrect signatures.

Last Updated: 09 Jul 2018 12:45 by ADMIN
Using a hidden button and calling its .click() method is sometimes used to invoke a postback under some application logic conditions. If you use the jQuery method and a RadAjaxPanel, this will no longer work with jQuery3 because its strict mode causes the MS AJAX scripts to throw an error.

Below is a sample repro of the scenario and it shows two of the workarounds. The third workaround is to downgrade jQuery to an older version (for example, 1.11.1 which is the previous version the suite used):

        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
                <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" />
                <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />
        <telerik:RadCodeBlock runat="server" ID="rcb1">
                function clickHiddenButton1() {
                    //workaround 1
                    //__doPostBack("<%=Button1.UniqueID%>", "");
                    //workaround 2
        <asp:Button Text="click hidden button" ID="testButton1" OnClientClick="clickHiddenButton1(); return false;" runat="server" />
        <telerik:RadAjaxPanel runat="server" ID="rap1" OnAjaxRequest="rap1_AjaxRequest">
            <asp:Label Text="" ID="Label1" runat="server" />
            <asp:Button Style="display: none;" Text="hidden button" ID="Button1" OnClick="Button1_Click" runat="server" />
Last Updated: 09 Dec 2019 14:46 by ADMIN
When using RadAjaxManager or RadAjaxPanel in SharePoint 2019 for the purpose to enable ajax for Controls, a partial PostBack will cause the page become Blank. A test was conducted using the generic ASP UpdatePanel which worked as expected.
Last Updated: 19 Dec 2013 15:41 by ADMIN
When i init ajaxmanager ajaxRequest from client side radprogressmanager starts its unstoppable progress callbacks and overloads IIS. Please find the attached code to reproduce the issue. Run App and run chrome/ firefox debugger, wait for 2 mins for timer to init ajax request as required and then you can see radprogress unstoppable callbacks. 
Last Updated: 19 Oct 2017 16:36 by Mike
A grid in a RadAjaxPanel will fire several requests when exporting if there is a RadAjaxManager on the page as well.

Stems from the _setupExclusionFilters function where each RadAjaxControl adds as a handler to Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest which does a  sender._form.submit(); and gets called in the initialize method of the control.

The resolution is to use only RadAjaxManager to AJAX-enable complex pages that require the built-in exports as well and make sure to remove all RadAjaxPanel instances. This is the better approach anyway:

Repro and example solutions are added in the file attached below.
Last Updated: 30 Nov 2015 09:26 by ADMIN
Created by: Danail Vasilev
Comments: 0
Category: Ajax
Type: Bug Report
The Ajax in the sample page is made using:

$find("<%= RadAjaxManager.GetCurrent(Page).ClientID %>").ajaxRequest();

In on the page the AjaxManger updates the panel, in the other the setting is that the proxy should update the panel. This is invalid setting.

<telerik:AjaxSetting AjaxControlID="RadAjaxManagerProxy1" >
        <telerik:AjaxUpdatedControl ControlID="rsLeftPanel" LoadingPanelID="ralp1" />

The correct way of doing this is to use add the settings programatically, or to use the ajaxRequestWithTarget instead of ajaxRequest method
Last Updated: 01 Jun 2015 10:47 by ADMIN
Last Updated: 17 Aug 2015 11:28 by ADMIN
Last Updated: 20 Jan 2015 08:26 by ADMIN
Created by: Alex
Comments: 1
Category: Ajax
Type: Bug Report
Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB7.5; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E)
Timestamp: Tue, 5 Nov 2013 20:08:42 UTC

Message: Expected identifier
Line: 541
Char: 18
Code: 0
URI: http://test/Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=rsmMain_TSM&compress=1&_TSM_CombinedScripts_=%3b%3bSystem.Web.Extensions%2c+Version%3d4.0.0.0%2c+Culture%3dneutral%2c+PublicKeyToken%3d31bf3856ad364e35%3aen-US%3ac9cbdec3-c810-4e87-846c-fb25a7c08002%3aea597d4b%3ab25378d2%3bRMSWeb%3aen-US%3affbcc4ad-6e36-47e9-bd28-56e10d4d3ccd%3a43e04e1c%3ae90c43c6%3ac2fa243f%3a748e57f2%3bLAO.Web%3aen-US%3a789e0dea-6f9a-4c0f-a1db-5b64c6e6f0d7%3ad16f8f2a%3ae282b917%3bTelerik.Web.UI%2c+Version%3d2013.3.1015.45%2c+Culture%3dneutral%2c+PublicKeyToken%3d121fae78165ba3d4%3aen-US%3a7a1d9c2d-6cf2-464f-9ad3-e479c730ac61%3a16e4e7cd%3aed16cbdc%3af7645509%3a24ee1bba%3a874f8ea2%3af46195d3%3a92fe8ea0%3a19620875%3afa31b949%3a490a9d4e%3abd8f85e4%3a88144a7a%3a1e771326%3a4cacbc31%3a2003d0b8%3ae524c98b%3aa7e79140%3ab7778d6c%3a7165f74%3a58366029%3aaa288e2d 
Last Updated: 13 Jul 2015 09:43 by ADMIN
Created by: Angel Petrov
Comments: 0
Category: Ajax
Type: Feature Request

Last Updated: 17 Mar 2015 08:40 by ADMIN
Had a go to meeting to discuss Telerik tools integration with Desislava Nikolo and another consultant. They acknowledged this issue and resolved to contact me after the meeting to provide a fix. 
Basically, from the Telerik Tab in the IDE 2010, I am unable to load any of the RAD tools for development.
Last Updated: 14 Dec 2013 09:23 by ADMIN
If we create a RadTextBox with procentage width property, and define  labelwidth property total width of generated span content is smaller then span width :       <telerik:RadTextBox   ID="RadTextBoxEditName" runat="server" Width="80%" Label="Наимен:"  LabelWidth="100px"                                                                   LabelCssClass="sfContactFormLabel">                                                               </telerik:RadTextBox>

and html generated:

<span id="ctl00_ContentPlaceHolder1_RadTextBoxEditName_wrapper" class="riSingle RadInput RadInput_Default" style="width:80%;"><label class="riLabel sfContactFormLabel" for="ctl00_ContentPlaceHolder1_RadTextBoxEditName" id="ctl00_ContentPlaceHolder1_RadTextBoxEditName_Label" style="width:100px;">Наимен:</label><span class="riContentWrapper" style="width:80%;"><input id="ctl00_ContentPlaceHolder1_RadTextBoxEditName" name="ctl00$ContentPlaceHolder1$RadTextBoxEditName" size="20" class="riTextBox riRead" type="text" value="" readonly=""></span><input id="ctl00_ContentPlaceHolder1_RadTextBoxEditName_ClientState" name="ctl00_ContentPlaceHolder1_RadTextBoxEditName_ClientState" type="hidden" autocomplete="off" value="{&quot;enabled&quot;:true,&quot;emptyMessage&quot;:&quot;&quot;,&quot;validationText&quot;:&quot;&quot;,&quot;valueAsString&quot;:&quot;&quot;,&quot;lastSetTextBoxValue&quot;:&quot;&quot;}"></span>

Why width css property equals within span wrapper and input 
Last Updated: 20 Nov 2013 15:48 by Tim
Created by: Tim
Comments: 0
Category: Ajax
Type: Bug Report
When columns (in any control which supports them - Grid, TreeList, etc.) are sorted, the Sorting Icon wraps below the HeaderText.  If the CSS/Styling is updated to have the "<a>" tag in the ColumnHeader display as "inline-block", this resolves the issue slightly.  However, now the end-user has to be sure to click on the HeaderText itself in order to sort the column.  This is especially annoying when the Columns also support reordering.

I would suggest that Telerik add a "<table>" tag inside the column header and have the HeaderText in one cell and the SortIcon in the following cell.  The right-most cell with the SortIcon can be set to a specific width so that the HeaderText just expands as necessary and wraps as necessary without ever affecting the SortIcon.  Also, the cells should have Css Classes defined so that developers can override any styling behavior as necessary (class="col-text" and class="col-sortIcon" for example).

This should be optional (a property which turns this on/off at the overall Control level) if developers want one way or the other (ColumnRenderMode=Inline/Table?).  Or even maybe at each Column (might be overkill)?
Last Updated: 16 Jul 2015 08:34 by ADMIN
When a RadContol is placed into a RadAjaxPanel, its method DescribeComponent is fired twice on postback.
Last Updated: 01 Nov 2013 13:06 by ADMIN
Created by: Carlos
Comments: 1
Category: Ajax
Type: Feature Request
Running for the firts time, the calendar displays correctly the things i want to; but if I navigate to another monts in the calendar, the event is is not fired, so the render of the things I want seems not to work.

This si the code:

Protected Sub RadCalendar1_DayRender(ByVal sender As Object, _
ByVal e As Telerik.Web.UI.Calendar.DayRenderEventArgs) _
Handles RadCalendar1.DayRender
    Dim CurrentDate As DateTime = e.Day.[Date]
    If CurrentDate.Month <> RadCalendar1.FocusedDate.Month Then
        e.Cell.Text = "(" + CurrentDate.Day + ")"
    ElseIf e.Day.IsToday Then
        e.Cell.Style("background-color") = "Red"
    End If
End Sub

Last Updated: 01 Nov 2013 13:06 by ADMIN
Created by: Pankaj
Comments: 1
Category: Ajax
Type: Bug Report
I am getting an error when trying to install the Rad Controls for AJAX. Internet is already working on that , but still it says to check internet connection. It's look like some proxy setting error , please suggest i am not able o figured out the cause.

Please see attached screenshot of error.
Last Updated: 27 Jan 2014 10:32 by Elena
Created by: Marco
Comments: 1
Category: Ajax
Type: Bug Report
I tried to set the focus on a RadAutoCompleteBox in many different ways. Unfortunately nof them worked.
Neither on server-side by RADAutoCompleteBox1.Focus() in the page_load Event, nor on client-side by using the OnClientLoad Event of the RACB. Any ideas how to get it done? I guess this is a bug as Setting Focus on other control works easily.
1 2