5 answers

510 views

Telerik UI for ASP.NET Core versioning feedback

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.

General Discussions

answered on 05 Feb 2024

1 answer

468 views

URGENT: ListView completely broken v2023.1.314

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.

ListView

answered on 17 Mar 2023

0 answers

534 views

Grid Column Menu Unstick Message is Null

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")))

Grid

asked on 16 Sep 2020

1 answer

6 views

ComboBox Data Binding - Pre=select value

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

ComboBox

answered on 04 Jul 2025

0 answers

4 views

Get 2 cancel buttons thats one to manny!

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...

asked on 02 Jul 2025

1 answer

10 views

Grid instance in javascript

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

Grid

answered on 01 Jul 2025

1 answer

8 views

How to pass a custom class to a textbox label

I'm trying to apply a class to a textbox label like so:

<kendo-textbox name="customerNameTextbox" for="@Model.Name">
<textbox-label content="Name" class="required" />
</kendo-textbox>

However, I can see in the browser development console that the label component associated with the component only has the usual k- classes applied to it:

How can I make sure my class is applied to the label?

TextBox

answered on 29 Jun 2025

2 answers

9 views

Multiselect in grid without CTRL

Hi all,

Going nuts over this problem. Should be simple, and for other technologies telerik shows solutions, but can not get it to work for razor pages .net core.

What i want is:

I have a grid that opens in a popup when editting. In the editortemplate i have a childgrid showing all possible children that can be added to this record. That is working. However, i want to multiselect in this grid without having my customers to hold down ctrl or use a textbox. Main reason: When using a textbox, you really have to click in the textbox, clicking outsisde of it won't work. So i removed the select column (the checkboxes) and just want people to click somewhere on a row to select it and be able to click on another row without the fiorst one loosing it's selected status. The only hook i can find is the onchange event. This indeed allows me to catch the slection process. However, the previously selected items are not available any more, so i oose them.

Anyone an idea how to do this quite simple trick?

Grid

answered on 28 Jun 2025

2 answers

10 views

Telerik icon font style setup

Hi,

I'm following this link below to set up icons. What is @progress in the link?

https://www.telerik.com/kendo-jquery-ui/documentation/styles-and-layout/sass-themes/font-icons#basic-usage

<link rel="stylesheet" href="https://unpkg.com/@progress/kendo-font-icons/dist/index.css" />

Thanks,

Bob

Button

answered on 27 Jun 2025

0 answers

7 views

watermark merging not happening

Some PDF files are showing the following error during the watermark merging process. Please find the error below and kindly advise.

Error:

at Telerik.Windows.Documents.Utilities.Guard.ThrowExceptionIfNull[T](T param, String paramName)     at Telerik.Windows.Documents.Fixed.Model.RadFixedDocument.Merge(RadFixedDocument source)     at FinalPdfGenerator.CommitteePdfGeneratorService.CreateClonedDocument(RadFixedDocument document, RadFixedDocument existingDocument, Notes note) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 129
   at FinalPdfGenerator.CommitteePdfGeneratorService.GenerateFirstPage(Notes e_Note) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 215
   at System.Linq.Enumerable.Select[TSource,TResult](IEnumerable`1 source, Func`2 selector)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Operators.Text.ShowText.Execute(IContentStreamInterpreter interpreter, IPdfContentImportContext context, PdfString text)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Operators.Text.ShowTextArray.Execute(IContentStreamInterpreter interpreter, IPdfContentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.InterpreterBase`1.<>c__DisplayClass8_0.<Execute>b__0()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation, Action`1 onException)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.InterpreterBase`1.Execute()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.ContentStream.ParseContentData(Byte[] data, IRadFixedDocumentImportContext context, IResourceHolder resourceHolder, IContentRootElement contentRoot, ContentStreamKeywordCollection keywordCollection)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.Page.CopyPageContentTo(IRadFixedDocumentImportContext context, RadFixedPage fixedPage)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyAllPageProperties(PostScriptReader reader, IRadFixedDocumentImportContext context, List`1 contextPages, IList`1 pages)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPagePropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.RadFixedDocumentImportContext.BeginImportOverride()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.BeginImport(Stream pdfFileStream)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImporter.Import(Stream input, IPdfImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.<>c__DisplayClass18_0.<ImportOverride>b__0()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)     at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Import(Stream input)     at FinalPdfGenerator.CommitteePdfGeneratorService.LoadExistingDocument(String file) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 727
   at FinalPdfGenerator.CommitteePdfGeneratorService.GenerateFirstPage(Notes e_Note) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 215
   at Telerik.Windows.Documents.Utilities.Guard.ThrowExceptionIfNull[T](T param, String paramName)     at Telerik.Windows.Documents.Fixed.Model.RadFixedDocument.Merge(RadFixedDocument source)     at FinalPdfGenerator.CommitteePdfGeneratorService.CreateClonedDocument(RadFixedDocument document, RadFixedDocument existingDocument, Notes note) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 129
   at System.Runtime.CompilerServices.RuntimeHelpers.AllocateUninitializedClone(Object obj)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.SimpleFontObject.GetToUnicodeOverride(CharCode code)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Fonts.FontObject.GetCharactersOverride(PdfString str)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Operators.Text.ShowText.Execute(IContentStreamInterpreter interpreter, IPdfContentImportContext context, PdfString text)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Operators.Text.ShowTextArray.Execute(IContentStreamInterpreter interpreter, IPdfContentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.InterpreterBase`1.<>c__DisplayClass8_0.<Execute>b__0()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation, Action`1 onException)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.InterpreterBase`1.Execute()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.ContentStream.ParseContentData(Byte[] data, IRadFixedDocumentImportContext context, IResourceHolder resourceHolder, IContentRootElement contentRoot, ContentStreamKeywordCollection keywordCollection)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.Page.CopyPageContentTo(IRadFixedDocumentImportContext context, RadFixedPage fixedPage)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyAllPageProperties(PostScriptReader reader, IRadFixedDocumentImportContext context, List`1 contextPages, IList`1 pages)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPagePropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.RadFixedDocumentImportContext.BeginImportOverride()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.BeginImport(Stream pdfFileStream)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImporter.Import(Stream input, IPdfImportContext context)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.<>c__DisplayClass18_0.<ImportOverride>b__0()     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.ExceptionHandling.ExecutionHandler.TryHandleExecution[E](Action operation)     at Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)     at Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Import(Stream input)     at FinalPdfGenerator.CommitteePdfGeneratorService.LoadExistingDocument(String file) in C:\Users\JayaprakashS\Xencia\IndianBank\CodeMerge_01Oct24\LatestReviewIBCode_IBUAT_05Jun25\FinalPdfGenerator\CommitteePdfGeneratorService.cs:line 727

Code:

private RadFixedDocument CreateClonedDocument(RadFixedDocument document, RadFixedDocument existingDocument, Model.Notes note)
{
RadFixedDocument clonedDocument = new RadFixedDocument();
try
{
foreach (RadFixedPage currentPage in existingDocument.Pages)
{
Watermark(currentPage, note.strNoteStatus, 0, 0, FirstVal);
Watermark(currentPage, note.noteNumber, 0, 65, SecVal);
}

clonedDocument.Merge(GenerateFirstPage(note));
clonedDocument.Merge(existingDocument);
clonedDocument.Merge(GenerateSignaturePage((int)note.noteId));
clonedDocument.Merge(CommentAuditLogPage((int)note.noteId));

int pageNumber = 0;
foreach (RadFixedPage currentPage in clonedDocument.Pages)
{
pageNumber++;
Footer(currentPage, pageNumber, clonedDocument.Pages.Count);
}
}
catch (Exception ex) {
AddLogs(_dbContext, "ECommittee Pdf Genarator", ex.StackTrace, ex.InnerException?.ToString());
}
return clonedDocument;
}

Template

asked on 19 Jun 2025