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UI for ASP.NET Core Forum
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We need your feedback, because we are considering changes in the release approach for Telerik UI for ASP.NET Core. Please provide your feedback in the comments section below:


1. Is it hard to understand the version numbers of our releases? If yes, what makes them hard to understand them?

2. Would semantic versioning (SemVer) of our releases make it easier to understand our version numbers and what's behind them?

3. If we go with SemVer, we might need to start with version 3000.0.0 as we currently use 2022.x.x. Please share your thoughts about this approach and ideas for what number versioning would work best for you.

Chris
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Iron
 answered on 05 Feb 2024
1 answer
469 views

Hi!

The ListView is breaking my web application, and I cannot make head or tail of the reason:

An unhandled exception occurred while processing the request.

NotSupportedException: "ClientTemplateId or ClientTemplateHandler" cannot be null or empty.

Kendo.Mvc.UI.ListView<T>.VerifySettings()

 

Also, you demos for the ListView are broken and the browser tab crashed after a while.

I need an urgent fix, as this is affecting the live application.

Aleksandar
Telerik team
 answered on 17 Mar 2023
0 answers
534 views

In our UI for ASP.NET Core R3 2020 (2020.3.915) release, the Column menu message of unsticking a column is "null".

This bug will be resolved in our next official release.

In the meantime, as a workaround, manually set the Unstick Column menu message:

.ColumnMenu(c => c.Messages(m => m.Unstick("Unstick Column")))
Kendo UI
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 asked on 16 Sep 2020
0 answers
4 views
please disregard this post
Gerardo
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 updated question on 12 Jul 2025
0 answers
5 views

Using Bootstrap grid row/columns, the listbox will not stay within the bounds of the column it is contained in.  Further, I have tried to limit it's width in CSS and it refuses.  What needs to be set to get this to conform to standard layout rules?  We are using HTMLHelper code to generate the listboxes.

Danielle
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Iron
 asked on 11 Jul 2025
0 answers
5 views

Hi Team,

In our ASP.Net Core MVC project we are using the Telerik Feed for automatic package restoration which work fine by setting up the Username and Password in the nuget.config file inside the %AppData% Folder(C:\Users\-----\AppData\Roaming\NuGet  present inside windows), but when we try to deploy build into the server Nuget package restore is failing. May I expect any assistance on this or any steps are we missing which we need to follow to get restoration happen properly on the server.

1 answer
11 views

I have a simple test page that has a Chart and a PDF Viewer. I can not get both to work at the same time without getting a license error.

Below is how I  have tried loading the Kendo library at the top of the page. For the chart, I need to load it as a script for it to work. For the PDF Viewer I need to load it as a module. But loading both always breaks the license. I have tried version combinations (see below) 

How do I get a chart on the same page as the PDF Viewer and have the license work?

Scenario 1:

<script src="~/Portal/kendo/kendo.all.min.js" ></script>
<script src="~/Portal/kendo/kendo.aspnetmvc.min.js" ></script>

  • Chart loads correctly
  • PDF Viewer fails to load
  • The license loads correctly

 Scenario 2:

<script src="~/Portal/kendo/kendo.all.min.js" type="module" ></script>
<script src="~/Portal/kendo/kendo.aspnetmvc.min.js" type="module" ></script>

  • Chart fails to load
  • PDF Viewer loads correctly
  • The license loads correctly

Scenario 3:

<script src="~/Portal/kendo/kendo.all.min.js" ></script>
<script src="~/Portal/kendo/kendo.aspnetmvc.min.js" ></script>

<script src="~/Portal/kendo/kendo.all.min.js" type="module" ></script>
<script src="~/Portal/kendo/kendo.aspnetmvc.min.js" type="module" ></script>

  • Chart loads correctly
  • PDF Viewer loads correctly
  • The license fails to load

 

Thanks,

Richard

Eyup
Telerik team
 answered on 08 Jul 2025
1 answer
7 views
Why do i have 3 buttons special the last Cancel ?


@(
Html.Kendo().Grid<IndexModel.CompanyFinancialVM>()
    .Name("gridCompanyFinancial")
    .Navigatable()
    .Height(590)
    .Sortable()
    .Editable(e => e.Mode(GridEditMode.InCell))
    .Scrollable()
    .ToolBar(t => { t.Save(); t.CancelEdit(); })
    .Columns(columns =>
    {
        columns.Bound(f => f.CompanyName).Title("Company").Width(150);
        columns.Bound(f => f.PeriodName).Title("Period").Width(120);
        columns.Bound(f => f.VariableName).Title("Variable").Width(150);
        columns.Bound(f => f.VariableTypeName).Title("Variable Type").Width(120);
        columns.Bound(f => f.Val).Title("Val")
            .Width(100)
            .Format("{0:n}") // Show 4 decimals and thousand separator
            .EditorTemplateName("Decimal");
        columns.Bound(f => f.ValCurr)
            .Title("Currency")
            .ClientTemplate("#= getCurrencyName(ValCurr) #")
            .EditorTemplateName("Currency")
            .Width(120);
        columns.Bound(f => f.QuantumFK)
            .Title("Quantum")
            .ClientTemplate("#= getQuantumName(QuantumFK) #")
            .EditorTemplateName("QuantumFK")
            .Width(120);
        columns.Bound(f => f.Priority).Title("Priority").Width(80);
        columns.Bound(f => f.SpecOrder).Title("Spec Order").Width(100);
        columns.Bound(f => f.Rem).Title("Remarks").EditorTemplateName("Rem");
    })
    .DataSource(ds => ds.Ajax()
        .Read(r => r.Url(Url.Content("~/CompanyFinancial/Index?handler=Read")).Data("getGridRequestData"))
        .Update(u => u.Url(Url.Content("~/CompanyFinancial/Index?handler=Update")).Data("forgeryToken"))
        .Batch(true)
        .Model(m =>
        {
            m.Id(f => f.Nr);
            m.Field(f => f.CompanyName);
            m.Field(f => f.PeriodName);
            m.Field(f => f.VariableName);
            m.Field(f => f.VariableTypeName);
            m.Field(f => f.Priority);
            m.Field(f => f.SpecOrder);
            m.Field(f => f.Val);
            m.Field(f => f.ValCurr);
            m.Field(f => f.QuantumFK);
            m.Field(f => f.Rem);
        })
        .Sort(s => s.Add(f => f.SpecOrder).Ascending())
        .PageSize(20)
    )
    .Pageable()
I have disabled all script on the page, except the simpel lookups for foreginkeys in dataset...
Anton Mironov
Telerik team
 answered on 07 Jul 2025
1 answer
8 views

Hi,

I'm trying to understand the data binding for a combo box control.

 

Approach 1. - Using the bind-to attribute. I added "Selected=true" to one of item in the continents data source. This is okay the control pre-selects the item correctly.

Ref https://www.telerik.com/aspnet-core-ui/documentation/html-helpers/editors/combobox/getting-started#3-select-a-default-value

    @{
        var continents = new List<SelectListItem> {
            new SelectListItem() {Text = "Africa", Value = "1"},
            new SelectListItem() {Text = "Europe", Value = "2"},
            new SelectListItem() {Text = "Asia", Value = "3"},
            new SelectListItem() {Text = "North America", Value = "4", Selected=true},
            new SelectListItem() {Text = "South America", Value = "5"},
            new SelectListItem() {Text = "Antarctica", Value = "6"},
            new SelectListItem() {Text = "Australia", Value = "7"}
        };
    }

    <h4>ComboBox:</h4>
    <kendo-combobox name="combobox1"
                    datatextfield="Text"
                    datavaluefield="Value"
                    placeholder="Select a value"
                    bind-to="continents"
                    style="width: 250px;">
    </kendo-combobox>

 

Approach 2. - Ajax binding. I have the same datasource as Approach 1 to return in TestController.cs. I"m expecting "North America" should be pre-selected but it's not. Is this an expected behavior by design when using Ajax binding that "Selected=true" is not appliable? The reason why I'd like to use "Selected=true" with Ajax binding is because there are some logics in a controller action that set the default value for a combo box. I don't want to use the "value" attribute. I knew using the value attribute works for sure.

Ref https://www.telerik.com/aspnet-core-ui/documentation/html-helpers/editors/combobox/binding/ajax-binding

TestController.cs

    public IActionResult Getcontinents(string payload)
    {
        var continents = new List<SelectListItem> {
            new SelectListItem() {Text = "Africa", Value = "1"},
            new SelectListItem() {Text = "Europe", Value = "2"},
            new SelectListItem() {Text = "Asia", Value = "3"},
            new SelectListItem() {Text = "North America", Value = "4", Selected=true},
            new SelectListItem() {Text = "South America", Value = "5"},
            new SelectListItem() {Text = "Antarctica", Value = "6"},
            new SelectListItem() {Text = "Australia", Value = "7"}
        };

        return Json(continents);
    }

Index.cshtml

    <kendo-combobox name="combobox2"
                    datatextfield="Text"
                    datavaluefield="Value"
                    filter="FilterType.Contains">
        <datasource server-filtering="false">
            <transport>
                <read url="/Test/Getcontinents"/>
            </transport>
        </datasource>
    </kendo-combobox>

Any insights or thoughts?

Thanks,

Bob D

Mihaela
Telerik team
 answered on 04 Jul 2025
1 answer
15 views

Hi,

I'm using Teleik Core components, latest version in mvc application.

I have defined grid in view with name "gridMara"
In javascript i have code:

var gridMara = $("#gridMara").data("kendoGrid");

I checked in console, $("#gridMara") is initialized.
But when i use statement: 

var gridMara = $("#gridMara").data("kendoGrid");

the value of gridMara is undefined.

Please help.

Regards,
Tomaz

Eyup
Telerik team
 answered on 01 Jul 2025
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