Bug report

Reproduction of the problem

Go to this Progress Telerik REPL for ASP.NET Core.

Current behavior

(optional)
Provide additional information if the steps for reproducing the faulty behavior are not sufficient to describe the issue.

Expected/desired behavior

Like the Kendo UI for jQuery version, null should be a valid selection.

TicketID:

1718054

Environment

Kendo UI version: 2026.3.811
jQuery version: 4.0.0
Browser: all

Bug report

Reproduction of the problem

1. Initialize a Grid with the following Filter and ColumnMenu configuration:

@(Html.Kendo().Grid<TelerikMvcApp1.Models.OrderViewModel>()
    .Name("grid")
    .Columns(columns => {
        columns.Bound(p => p.OrderID).Filterable(false).Width(100);
        columns.Bound(p => p.ShipCity).Width(100);
        columns.Bound(p => p.ShipCity).Width(150);
        columns.Bound(p => p.OrderDate).Format("{0:MM/dd/yyyy}").Width(140);
    })
    .Sortable()
    .Filterable(f => f.Extra(true)
        .Messages(message => message.Equals("Равно"))
        .Messages(message => message.Filter("Приложи"))
        .Messages(message => message.Clear("Изчисти"))
        .Messages(message => message.Info("Покажи записи които:"))
        .Messages(message => message.And("и"))
        .Messages(message => message.Or("или"))
        .Messages(message => message.AdditionalOperator("fdfdfd"))
        .Messages(message => message.IsFalse("Активни  "))
        .Messages(message => message.IsTrue("Неактивни   "))
    )
    .ColumnMenu()
    .DataSource(dataSource => dataSource
        .Ajax()
        .PageSize(20)
        .Model(model => model.Id(p => p.OrderID))
        .Read(read => read.Action("Orders_Read", "Grid"))
     )
)

Or use this REPL example: https://netcorerepl.telerik.com/QSYflePv05yaqnLZ07

The issue is also reproducible with the ColumnMenu set the following way:

.ColumnMenu(cm => cm
        .Messages(message => message.Columns("Колони"))
        .Messages(message => message.ColumnSettings("Насторйки"))
        .Messages(message => message.Filter("Филтър"))
        .Messages(message => message.SortAscending("Сортирай възходящ ред"))
        .Messages(message => message.SortDescending("Сортирай низходящ ред"))
    )

Current behavior

The filter menu messages are not set.

Expected/desired behavior

The filter menu messages are set regardless of whether a ColumnMenu is enabled or not.

Environment

• Kendo UI version: 2024.1.314
• jQuery version: x.y
• Browser: [all]

Bug report

The jQuery dependency is defined as follows in the package .nuspec file:

<dependency id="jQuery" version="(, 3.7.1]" />

This causes the following warning to appear when installing the package in a project:

Telerik.UI.for.AspNet.Mvc5 2024.3.1015 does not provide an inclusive lower bound for dependency jQuery (<= 3.7.1). jQuery 1.4.1 was resolved instead.

The affected packages are:
Telerik.UI.for.AspNet.Mvc5
Telerik.UI.for.AspNet.Mvc5.Trial

Reproduction of the problem

Install the Telerik.UI.for.AspNet.Mvc5 package in a project and check the warnings list.

Current behavior

Warning:
Telerik.UI.for.AspNet.Mvc5 2024.3.1015 does not provide an inclusive lower bound for dependency jQuery (<= 3.7.1). jQuery 1.4.1 was resolved instead.

Expected/desired behavior

Add a lower bound (https://learn.microsoft.com/en-us/nuget/reference/errors-and-warnings/nu1604) to resolve the warning about the jQuery dependency.

Environment

• Kendo UI version: 2024.3.1015
• jQuery version: x.y
• Browser: [all]

Bug report

The Telerik.UI.for.AspNet.Mvc5 2026.3.811 package lists Telerik.SvgIcons and Telerik.FontIcons version 4.9.2 as dependencies in its .nuspec file.

However, compiling a project that references Telerik.UI.for.AspNet.Mvc5 results in package version conflicts for both packages.

The rquired version of the Telerik.SvgIcons and Telerik.FontIcons is 4.11.0

Expected/desired behavior

There should be no version mismtach for the Kendo.MVC.dll dependencies.

Environment

• Kendo/Telerik version: 2026.3.811

Bug report

Clearing the value with the Signature "clear" button does not trigger the widget's change event.

Reproduction of the problem

Run the following Dojo example: https://dojo.telerik.com/KhlVWvam

1. Draw something in the Signature
2. Click on the "clear" button

Expected

The change event fires.

Actual

The change event does not fire.

Environment

**Kendo UI version: 2025.1.211
**Browser: [all]

### Bug report

When filtering a specified Grid column, the filter expressions are inverted when the value of the first expression is empty/null.

### Reproduction of the problem

1) Filter a Grid column by leaving the first filter value empty:

2) Filter the Grid and open again the filter menu. The filter expressions are inverted:

A Dojo sample for reproduction: https://dojo.telerik.com/CXChcTJT

### Expected/desired behavior

The filter menu expressions must remain the same.

### Environment

* **Kendo UI version: 2025.2.702
* **jQuery version: 3.7.0
* **Browser: [all]

### Bug report

When setting the NoDataTemplate() option to an empty string, the option is not serialized.

### Reproduction of the problem

1. Define an AutoComplete with NoDataTemplate("")

2. Search for a non-existing option and notice how the popup opens and displays the default "No data found" message. When initializing the AutoComplete with jQuery and the "noDataTemplate" is set to "", the popup does not open.

A REPL sample for reproduction: https://netcorerepl.telerik.com/cfkPEClS50FUVU5z00

### Expected/desired behavior

When the NoDataTemplate("") is set and there are no results, the popup must not open. The NoDataTemplate option must work equally when using either the AutoComplete HtmlHelper or Kendo UI for jQuery AutoComplete.

### Environment

* **Telerik UI for ASP.NET MVC version: 2024.4.1112
* **Browser: [all]

Bug report

When the scrollable option is disabled, on resizing the browser window by making it more narrow, at certain point the columns stop resizing and the whole table goes out of the right border of the Grid. Reproducible with the SASS and LESS themes.

Reproduction of the problem

Dojo example: https://dojo.telerik.com/ItIrEzEY/3

1. Either resize the right pane or use Fullscreen and resize the browser window and make it narrower.

Current behavior

The table goes out of wrapping element (.k-grid).

Expected/desired behavior

The columns resize and the table remains within the borders of the Grid.

Environment

• Kendo UI version: 2023.1.117
• jQuery version: x.y
• Browser: [all]

Bug report

Bundling the Kendo js files in an ASP.NET MVC application throws a NullReferenceException error. Reproduced with versions 2024.1.319 and 2024.2.514. The bundling works without exceptions in version 2023.3.1114.

Reproduction of the problem

1. Add the following bundle to the BundleConfig.cs file:

bundles.Add(new ScriptBundle("~/bundles/kendo").Include(
        "~/Scripts/kendo/2024.2.514/kendo.web.min.js",
        "~/Scripts/kendo/2024.2.514/kendo.aspnetmvc.min.js"
));

Instead of kendo.web.min.js you can use kendo.all.min.js with the same result.

2. Render the scripts in the _Layout.cshtml's head element after jQuery by calling:

@Scripts.Render("~/bundles/kendo")

Current behavior

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Workaround:

Use bundles.Add(new Bundle("~/bundles/kendo") instead of bundles.Add(new ScriptBundle("~/bundles/kendo")

Expected/desired behavior

No exception is thrown when bundling the Kendo script files.

Environment

• Kendo UI version: 2024.2.514
• jQuery version: x.y
• Browser: [all ]

Bug report

Reproduction of the problem

1. Reference kendo.all.min.js and kendo.all.min.js.map in a project
2. Add a basic Grid:

<div id="grid"></div>
<script>
    // The dataSource is initialized as a stand-alone widget that can be bound to the Grid.
    var dataSource = new kendo.data.DataSource({
        transport: {
            read: {
                // The remote endpoint from which the data is retrieved.
                url: "https://demos.telerik.com/kendo-ui/service/products",
                dataType: "jsonp"
            }
        },
        pageSize: 10
    });

    $("#grid").kendoGrid({
        // The dataSource configuration is set to an existing DataSource instance.
        dataSource: dataSource,
        pageable: true
    });
</script>

3. Open the browser's dev tools Source tab and place a breakpoint (e.g., on line 3715).

Current behavior

The breakpoint is added at the last line (326079) of the file.

Expected/desired behavior

The breakpoint is added at the desired line (e.g., 3715).

Environment

• Kendo UI version: 2023.3.1010
• jQuery version: x.y
• Browser: [ Chrome XX]

The below exception is thrown when upgrading using latest Telerik UI for ASP.NET MVC extension.

Failed to execute command.

System.NotImplementedException: Not implemented (Exception from HRESULT: 0x80004001 (E_NOTIMPL)) 
at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo) 
at Microsoft.VisualStudio.CommonIDE.Solutions.Dte.DteGenericProject.GetFileName() 
at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.<>c__DisplayClass1_0`1.<<RunInMainThread>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown --- 
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread() 
at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread() 
at Telerik.VSX.NuGet.NuGetPackageService.GetInstalledPackage(Project project, String packageName, Boolean isPackageNamePartial, Boolean ignoreCapabilityMatchCheck) 
at Telerik.VSX.Web.Helpers.ProjectWrap.GetMvcVersion() 
at Telerik.VSX.Web.Helpers.ProjectWrap.CheckIsProjectSupported() 
at Telerik.KendoUI.Mvc.VSX.Helpers.KendoUIMvcProjectWrap.CheckIsProjectSupported() 
at Telerik.KendoUI.Mvc.VSX.Helpers.ProjectSearcher.FilterTelerikSupportedLanguageProjects(List`1 projectsList) 
at Telerik.VSX.Internal.VisualStudio.VisualStudioThreadHelper.<>c__DisplayClass1_0`1.<<RunInMainThread>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown --- 
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() 
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) 
at Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread() 
at Microsoft.VisualStudio.Threading.JoinableTask`1.CompleteOnCurrentThread() 
at Telerik.KendoUI.Mvc.VSX.Helpers.ProjectSearcher.GetTelerikEnabledProjectsByMainAssemblyMvcVersion(TargetMvcVersion mvcVersion) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.ShouldShowTargetMvcPage(TargetMvcVersion targetMvcVersion) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.GetProjectUpgradePreWizardData(IScenarioDef template) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.ProjectConfigurationTypeSelector.ProjectUpgrade(IPropertyDataDictionary additionalPreWizardData) 
at Telerik.KendoUI.Mvc.VSX.ProjectConfigurators.StreamlinedProjectConfiguration.StartUpgradeWizard() 
at Telerik.VSX.VSPackage.PackageBase.CommandCallback(Object sender, EventArgs e)

Bug report

The tables within the Editor are not exported correctly (do not fit in the exported pdf document) when resized before exporting.

Reproduction of the problem

1. Open the following demo.
   https://demos.telerik.com/kendo-ui/editor/pdf-export
2. Resize the column of the table.
3. Export to PDF.

Current behavior

The table does not fit in the exported document.

Expected/desired behavior

The table should fit in the document.

Environment

• Kendo UI version: 2022.2.510
• Browser: [all]

Hello,

We are using Telerik UI for ASP.NET MVC for an interactive map. We have added GeoJSON shapes to the map. We want to display tooltips on the shapes but have noticed that the mouse enter/leave and tooltip display seems somewhat broken. When the user has zoomed in or out, the events seem to sometimes not be triggered at all, until the user has panned.
The issues we found were also present in this example: https://demos.telerik.com/aspnet-mvc/map/geojson
To reproduce:
1. Zoom in or out, either with the mosue wheel or with the map controls.
2. Move the mouse over shapes and check if they get any tooltip or highlight. Some of the time it will be working normally, some of the time the changes do not happen at all. If the problem does not appear, repeat the previous step and test again.
3. Panning the map, either by click-dragging or with the map controls, fixes the issue until further zooming breaks it again.

Thanks,

Will

Bug report

When using MVVM generated DropDownList input decorated with required attribute the validation message is not displayed upon validation.

Reproduction of the problem

1. Run this dojo
2. Click on a slot to create an event
3. Select an item from the second DropDownList
4. Click Save

Current behavior

Upon clicking Save the validation fails, as the first input has a required attribute, but a validation message is not displayed.

Expected/desired behavior

On failed validation, a validation message should be displayed.

Environment

• Kendo UI version: 2020.1.406
• Browser: [all]

Bug report

When a table is created through the table wizard and cellspacing is set to 0, this value is ignored and the table is created with no cellspacing value. 0 is a valid value and it affects the appearance of the table, so it should not be equivalent to not setting cellspacing.

Reproduction of the problem

Reproducible in the demos.

1. Use the table wizard.
2. Set 0 as cellspacing value.
3. Create the table.
4. Inspect the table in the browser's dev tools.

Current behavior

The table has no cellspacing attribute.

Expected/desired behavior

The table has cellspacing set to 0.

Environment

• Kendo UI version: 2020.2.617
• jQuery version: x.y
• Browser: [all ]

View several folders in treeview of the filemanager:  folder1, folder2, folder3

select folder1

now Click and drag folder2 to folder3.

the folder1 moves to folder3.  

this is not desired.

can be reproduced in the demo

https://demos.telerik.com/aspnet-mvc/filemanager

We are using the Kendo UI for different components like Grid in our APS.Net MVC application. Currently we are experiencing an issue while exporting the Kendo grid to Excel from mobile (both android and ios). It shows the following warning message. The same works when exporting from a PC without any issue. Could you please help to resolve the issue.

Hello,

On MAC, command+c cut instead of copy when selected texts are in a table. To duplicate, please follow these steps.

1. Go here: https://demos.telerik.com/aspnet-mvc/editor

2. Insert a new table.

3. Add some text into the table.

4. Select texts in the table.

5. Press command+c on MAC.

Please advise.

Thank you.

Bug report

Reproduction of the problem

Dojo example.

1. Open the dev tools console.
2. Click on the button above the Editor.
3. The Editor value is logged in the console.
   Note this part in the content:

if (value == 1) { text += "<h2>Apple</h2>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.<br><br>>> APPLE Deutschland</a>";

4. Click on the "viewHtml" tool. In the popup do not make any changes to the content, just click on "Update".
5. Click on the button above the Editor.
   The mentioned part of the script tag now looks like this:

if (value == 1) { text += "<h2>Apple</h2>
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.<br><br>>> APPLE Deutschland</a>";

A js exception is thrown after this content is loaded in the div below the Editor, because of the line break after:

if (value == 1) { text += "<h2>Apple</h2>

Current behavior

The viewHtml modifies the content of script tags, which causes js logic to become invalid.

Expected/desired behavior

The viewHtml tool should not make changes to the content of script tags.

Environment

• Kendo UI version: 2020.3.1021
• jQuery version: x.y
• Browser: [all]