Hello everyone,

Here are the highlights of the new online resources we published this week from 10 Nov 2025 to 17 Nov 2025:

Article: https://www.telerik.com/aspnet-mvc/documentation/ai-components-and-features
Summary: This article shows how to integrate LLM features in ASP.NET MVC apps using Telerik UI’s AI components, focusing on the AIPrompt and related server-side helpers. You’ll configure OpenAI or Azure OpenAI providers, proxy requests through an MVC controller to protect API keys, and control behavior such as streaming responses, system messages, and prompt templates with clear setup and customization examples.

Article: https://www.telerik.com/aspnet-mvc/documentation/html-helpers/diagrams-and-maps/diagram/binding
Summary: Bind the Kendo UI Diagram for ASP.NET MVC to local or remote data so shapes and connections are generated from your models. Configure the Diagram and Connections DataSource with the MVC fluent API—define model fields (Id, Text, X/Y, Width/Height, Type; From/To), map the schema, and set read/create/update/destroy actions—to control loading, layout, linking, and persistence.

Feel free to check them out and share your thoughts!

The Telerik Team

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Hello everyone,

Here are the highlights of the new online resources we published this week from 05 Nov 2025 to 10 Nov 2025:

Article: https://www.telerik.com/blogs/hiding-revealing-mobile-content-aspnet-mvc-responsive-panel
Summary: Learn how to use the Kendo UI ResponsivePanel in ASP.NET MVC to hide and reveal mobile content (such as navigation and sidebars) based on viewport width. The article shows initialization via the MVC HtmlHelper and HTML5 data attributes, configuring breakpoints, toggle targets, and auto-hide behavior, and handling open/close events and CSS to control layout and accessibility.

Feel free to check them out and share your thoughts!

The Telerik Team

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Hello everyone,

Here are the highlights of the new online resources we published this week from 29 Oct 2025 to 05 Nov 2025:

Article: https://www.telerik.com/aspnet-mvc/documentation/html-helpers/navigation/tabstrip/binding/ajax-binding
Summary: Configure the Telerik UI for ASP.NET MVC TabStrip to load tab content on demand via AJAX using .LoadContentFrom or .ContentUrl, with controller actions that return PartialView results. Handle select/contentLoad/error events, optional caching, and route values as needed to optimize page load and keep tab content modular and maintainable.

Article: https://www.telerik.com/aspnet-mvc/documentation/html-helpers/data-management/listview/binding/overview
Summary: This article explains how to bind the ASP.NET MVC ListView to data: bind directly to an IEnumerable

Feel free to check them out and share your thoughts!

The Telerik Team

Hi team,

We recently upgraded Telerik ASP.Net MVC to 2025.3.825, All the changes are good But when we try to create build the code through GIT-Hub CI/CD process getting below error.

Can you please help us to resolve the issue.

D:\actions-runner\_work\TestProject\Source\Test\packages\Telerik.Licensing.1.6.16\build\Telerik.Licensing.targets(29,3):
 error MSB4062: The "Telerik.Licensing.Tasks.ResolveTelerikProducts" task could not be loaded from the
 assembly D:\actions-runner\_work\TestProject\Source\Test\packages\Telerik.Licensing.1.6.16\build\..\tasks\netstandard2.0\Telerik.Licensing.Tasks.dll. 
 Could not load file or assembly 'Microsoft.Build.Utilities.Core, Version=15.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or 
 one of its dependencies. The system cannot find the file specified. Confirm that the <UsingTask> declaration is correct, 
 that the assembly and all its dependencies are available, and that the task contains a public class that 
 implements Microsoft.Build.Framework.ITask. [D:\actions-runner\_work\TestProject\Source\Test\Test.Web\Test.Web.csproj]

Hi,

I have a strict CSP implemented in the Program.cs file, after that when I verified the browser developer tool then I can see the get API is called 2 times.

Can you please let me know why this get API is called 2 times. 

When I analyze I found that Kendo Panelbar Select event is called twice so internally the Get API is called twice.

function OnSelect_Panel(sender) {

}

Inside the OnSelect_Panel() method is calling twice so the GET API also called twice. How can I restrict to one API call.

Note: Without strict CSP OnSelect_Panel() is called once but with strict CSP it called twice.

Hi,

I’m using the Kendo UI Grid with column menu filters. My requirement:

• Let the user pick a filter operator (e.g., contains, equals).

• Don’t apply a filter if the value is empty.

• Keep the operator visible every time the 3-dot menu opens, even after sorting.

What I’ve tried:

1. columnMenuInit → Works first time, but doesn’t fire again for the same column.

2. Popup open inside columnMenuInit → Fires once, but after sorting the grid, it doesn’t trigger again.

3. Delegated jQuery click handler → Works reliably, but feels like a hack.

Minimal repro (MVC wrapper):

@(Html.Kendo().Grid<MyModel>()
    .Name("Invoices")
    .Columns(c => {
        c.Bound(x => x.InvoiceNumber);
        c.Bound(x => x.CustomerName);
    })
    .Sortable()
    .Filterable(f => f.Extra(false))
    .ColumnMenu(m => m.Filterable(true))
    .Events(e => e.ColumnMenuInit("onColumnMenuInit"))
)

<script>
function onColumnMenuInit(e) {
    var popup = e.container.data("kendoPopup");
    if (popup) {
        popup.bind("open", function () {
            var ddl = e.container.find("select[title='Operator']").data("kendoDropDownList");
            if (ddl) ddl.value("contains"); // operator only, no value
            e.container.find("input[type=text]").val("");
        });
    }
}
</script>

Issue:

• The operator shows correctly the first time.

• After sorting and reopening the menu, the operator reset logic does not run.

Questions:

• Is there an official event I can use to run logic every time the column menu opens?

• What’s the recommended way to restore operator state when no filter value is applied?

Thanks!

Good morning,
i am using MVC.ASP net in my project and i'm trying to send the DataSourceRequest to a service , via rabbitmq.

the message should contains all the request filters set in the ui in order to create an excel report. i have tried to use the System.Text.Json serialization but it's not working properly. it serializes only the first level props.
i have found a ".ToJson" extension  but it's returning a Dictionary<string, object>, not usefule here.

can you suggest how to serialize the DataSourceRequest in Json format? with all nested and recursive properties?

the filters can be about dates, strings, combobox, and so on

thanks in advance

Hi,

wie have a Model A which is related to Model B (1:n). Both have a field of type DateTime with the DisplayFormat-Annotation '[DisplayFormat(DataFormatString = "{0:d}")]'.

If we display both fields in the Details-View of Model A, the formats are applied correctly.

If we display bot fields in a Telerik-GridView, only the format for Model A is applied. Model B shows something like '/Date(1741302000000)/'.

It's important to note, that our application is multilanguage, and we have to support different data formats for each language.

How would we go about this? Is this known behaviour?

Attempting to create persistence on filter.

I have the following filter:

                    @(Html.Kendo().Filter<...>()
                        .Name("fltMatrix")
                        .Events(e => e.Change("fltMatrix_Change"))
                        .DataSource("dataSource1")
                        .ExpressionPreview()
                        .Fields(f =>
                        {
...
                        }))
                    @Html.HiddenFor(model => model.FILTER)

I have the following JS code:

    function fltMatrix_Change(e) {
        e.sender.applyFilter();
        $("#FILTER").val(JSON.stringify(e.expression));
    }

    function getInitialExpression() {
        if ($("#FILTER").val()) {
            return JSON.parse($("#FILTER").val());
        }
    }

document.ready looks like this:

    $(document).ready(function () {
        if (getInitialExpression()) {
            var filter = $("#fltMatrix").data("kendoFilter");
            console.log(filter);
            var options = filter.getOptions();
            options.expression = getInitialExpression();
            filter.setOptions(options);
            filter.applyFilter();
        }
    });

console shows undefined and I get an error on the highlighted line:

jQuery.Deferred exception: Cannot read properties of undefined (reading 'getOptions') TypeError: Cannot read properties of undefined (reading 'getOptions')  

Everything else seems to work OK.  The filter is loading and updating the data source on change. The filter expression makes the round trip to the server and back.  It is just the .data("kendoFilter") that comes back with nothing.

As the title states, I have a legacy monolith that must be revived.

I need a few features, especially on the grid, and decided to upgrade Telerik. After a bit of struggle, I managed to run the application but the Telerik controls are by default very small compared to before and the new Size property doesn't seem to be doing much:

Before:

Now:

As it can be seen, the grid shrunk. I do not have a lot of custom CSS on this site but the baseline theme was Start Bootstrap v2 (Start Bootstrap - SB Admin 2 Bootstrap Admin Theme (http://startbootstrap.com)). Not sure if the original theme can still be found.