Questions on UI for ASP.NET AJAX Forum

0 answers

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Latest Online Resources about UI for ASP.NET AJAX

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General Discussions

asked on 27 Oct 2025

44 answers

9.1K+ views

Known Issues and Important Changes

This sticky thread lists known issues and breaking changes introduced in the UI for ASP.NET AJAX releases.

Q3 2011 (Version number: 2011.3.1115)

Problem: When adding items to OData-enabled controls (RadMenu, RadTreeView, RadListBox, RadComboBox) through design time erroneous markup is applied to the control:

<telerik:RadListBox runat="server" ID="RadListBox1">
    <Items>
    </Items>
    <WebServiceSettings>
        <ODataSettings InitialContainerName="">
        </ODataSettings>
    </WebServiceSettings>
</telerik:RadListBox>

Please note the added ODataSettings section. It will cause JavaScript errors on the page.

Solution: Remove the ODataSetting section and the issue will vanish. The problem is also fixed in the Q3 SP1 release, version number 2011.3.1305

General Discussions

updated question on 20 Oct 2025

1 answer

783 views

I'm getting an error with Telerik

When I run my project I'm getting this error

Could not load file or assembly 'Telerik.Web.UI' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

In my web.config I checked that the version in the web.config is the same as the version I'm using in references

General Discussions

answered on 22 Oct 2021

2 answers

2 views

Layanan TransNusa

Hubungi Call Center TransNusa O8553333974. Layanan Pelanggan TransNusa 24 jam.

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Grid

Scheduler

UI for ASP.NET AJAX in ASP.NET MVC

answered on 02 Nov 2025

1 answer

2 views

Layanan Pelita Air

Kamu bisa menghubungi customer care Pelita Air melalui nomor WhatsApp O851 6999 7575 Dengan mengirimkan pesan pada platform ini, kamu akan menerima tanggapan dengan fast respon.

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Grid

Scheduler

UI for ASP.NET AJAX in ASP.NET MVC

Window

answered on 02 Nov 2025

0 answers

25 views

Telerik UI for ASP.NET AJAX in Jetbrains Rider

I don't see anyone talking about migrating from Visual Studio to Jetbrains Rider using Telerik.

I have a 20+ year project that's had Telerik being used for a long time. When opening the project in Jebrains Rider, there are a lot of referencing issues and a lot of it is messed up, mostly related to telerik. I mainly use the Telerik wizards for Reporting and for the Ajax UI version, which don't exist in Rider. I wanted to see if anyone has any tips or tricks, or if there is talk about creating plugins for telerik on Jetbrains Rider?

General Discussions

asked on 03 Sep 2025

1 answer

17 views

Telerik.Web.UI.OrgChartDrillDownEventArguments.SourceNode.get returns Nothing

I try to follow the example in https://demos.telerik.com/aspnet-ajax/orgchart/examples/applicationscenarios/drilldowntoviewdetails/defaultvb.aspx?show-source=true but if I run the code and click on an icon for drill-down I get the error at the line "If e.SourceNode.ID <> "1" Then":

Telerik.Web.UI.OrgChartDrillDownEventArguments.SourceNode.get returned Nothing.

The code is:

Private Sub RadOrgChart2_DrillDown(sender As Object, e As Telerik.Web.UI.OrgChartDrillDownEventArguments) Handles RadOrgChart2.DrillDown
If e.SourceNode.ID <> "1" Then
Dim item = New OrgChartGroupItem()
e.SourceNode.Renderer.Controls.Remove(e.SourceNode.Nodes.Renderer)
e.SourceNode.GroupItems.Clear()
e.SourceNode.Nodes.Clear()
e.SourceNode.GroupItems.Add(item)
End If
End Sub

Please advise!

Thx
Gerhard

General Discussions

OrgChart

answered on 19 Aug 2025

1 answer

15 views

Width gets reduced during drag and on cancel do not restore original width

Hi Team,

We are using the Telerik RadScheduler control in our ASP.NET Web Application, configured with a Timeline view and vertical resource grouping. Appointments are displayed in the content pane, similar to the example provided in the following link, with the key difference being that resource grouping is set to vertical:

We are encountering a UI issue when a user drags an appointment to the first hour in the timeline view. If the appointment is moved slightly beyond the start of the timeline (into the previous period), it visually shrinks in width. Upon triggering the confirmation dialog and selecting "No", the appointment correctly returns to its original position, but its visual width remains reduced. This is corrected only upon a manual page refresh. Images shown below for reference.

Editor

General Discussions

answered on 01 Aug 2025

1 answer

278 views

'Sys' is undefined error (fiddler 404 on Telerik.Web.UI.WebResource.axd)

We are having an issue deploying to our user acceptance test and production environments, the telerik webresource.axd file is getting a 404 there, causing the infamous 'Sys' is undefined error I presume. The application works fine on the programmers development web server. The developers app pool is set up as Framework 4.0 Integrated pipeline Windows 7, the test and production environments we deploy to are also set up as Framework 4.0 Integrated pipeline, Windows 2008. We have had our server admin verify that the axd handler mappings are enabled. Additionally I have read all the threads concerning this error and have tried everything, to no avail. Pasted below are the system.web and system.webserver sections of our config file, we have included the telerik webresource axd handler, and it is recognized because if we remove it we get a telerik exception to go add it. The crux of the problem appers to be why we are getting a 404 on this axd. The site is accessed via IBM TAM (Tivoli Access Manager) in the deployment environments, if that makes any difference. Our telerik menus remder however they dont fly out due to not having their axd resources, I presume, so it appears like the telerik dll is getting loaded, telerik tags are recognized. We are deploying the telerik dll's in the /bin (not the GAC). Also pated below is the fiddler log of our default.aspx page loading, note the telerik axd file gets 404.

I tried a small experiment, I created a dummy test.axd text file and browset it from my development machine IIS, I got a 404.17 error "The requested content appears to be script and will not be served by the static file handler".

Then I copied the same file to our deployment server site root and browsed it. Instead of getting a 404.17 error I got a flat out 404 error saying that the resource could not be found.

There is definitly a diference in how the developer box and the deployment boxes are configured, does anyone have an idea.

We are desperate, and fully licensed for this product, we have a user community of 80,000 people waiting for us to deploy this release. So far the only thing holding it back is this problem. I would appreciate any help, we've exhausted everything we could find.

General Discussions

updated question on 23 Jul 2025

1 answer

74 views

Could not load file or assembly Telerik.Web.UI

Hi, I recently received a new laptop at work. I was eventually able to compile and run both of my 2 applications in localhost, and deploy one of them to Dev and Prod. However, I am having problems deploying my 2nd application.

Again, it works fine in localhost. When I deploy to the Dev environment, I get the error:

Could not load file or assembly 'Telerik.Web.UI, Version=2018.1.117.45, Culture=neutral, PublicKeyToken=121fae78165ba3d4' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

The version my reference points to is 2018.2.516.45. So I don't know where the 2018.1.117.45 version is coming from, or why it is attempting to load this version.

Yes, I KNOW that this is an old version. If need be, I can probably upgrade to a newer version. But if I can't figure out the version mis-match now, I think I will have the same problem with a newer version.

Any help is appreciated.

Thanks!

Ajax

General Discussions

answered on 13 Jun 2025