Unplanned
Last Updated: 27 Sep 2021 10:58 by ADMIN
Created by: Arvind
Comments: 1
Category: UI for ASP.NET Core
Type: Bug Report
1

Bug report

The DatePicker's popup has a CSS min-height property set that causes it to sometimes have an empty blank space at the bottom.

Reproduction of the problem

  1. Open the DatePicker Demo
  2. Expand the monthpicker

Review another occurence.

Expected/desired behavior

There should be a blank space in the DatePicker's popup.

Environment

  • Kendo UI version: 2021.3.914
  • Browser: [all]
Under Review
Last Updated: 03 Aug 2021 15:04 by ADMIN
Created by: A
Comments: 1
Category: UI for ASP.NET Core
Type: Bug Report
0

Kendo dialog structure doesn’t use Aria landmarks properly for buttons  - this leads to a validation error

The pager control's select box renders role="listitem" but the parent is missing role="list"  - this leads to a validation error

Listviews will render role="list" even when empty - this leads to a validation error

Kendo grids use 2 tables (one for header and one for the data) which means that there are no role="cell" assigned to any of the headers  - this leads to a validation error

Scrollable grids are missing a tabindex="0" to allow for keyboard navigation - this leads to a validation error

 

this form doesn't have Core 2, 2.1, 3.0, 3.1 or 5 in the .Net Framework drop down. Just gonna pick 4.8 even though it doesn't apply. I am using core 5.

In Development
Last Updated: 04 Jun 2021 12:40 by ADMIN
Scheduled for 2021.R2.SP.next

Bug report

A DataSource defined using TagHelpers with disabled serverPaging sets default pageSize:

    <datasource type="DataSourceTagHelperType.Ajax" server-filtering="true" server-paging="false">
            <transport>
                <read url="@Url.Page("Index", "Read")" data="forgeryToken" />
            </transport>
            <schema data="Data">
                <model id="OrderID">
                    <fields>
                        <field name="ShipName" type="string"></field>
                    </fields>
                </model>              
            </schema>
     </datasource>

generates the following initialization script:

{"dataSource":{"page":1,"pageSize":20,"schema":{"model":{"id":"OrderID","fields":{"ShipName":{"type":"string"}}},"data":"Data","errors":"Errors","total":"Total"},"serverAggregates":true,"serverFiltering":true,"serverGrouping":true,"serverPaging":true,"serverSorting":true,"transport":{"read":{"url":"/?handler=Read","data":forgeryToken}},"type":(function(){if(kendo.data.transports['aspnetmvc-ajax']){return 'aspnetmvc-ajax';} else{throw new Error('The kendo.aspnetmvc.min.js script is not included.');}})()}

with default pageSIze set.
Initializing using jQuery works as expected:

       dataSource: {
            type: "aspnetmvc-ajax",
            serverPaging: false,
            serverFiltering:true,
            transport: {
                read: {
                    url: "@Url.Page("Index", "Read")",
                    data: forgeryToken
                }
            },
            schema: {
                model: {
                    id:"OrderID"
                },
                data: "Data",
                total:"Total"
            }
        }

Current behavior

The "page" and "pageSize" values are set, which results in only 20 items being displayed, even though more are returned by the "read" action.

Expected/desired behavior

The "page" and "pageSize" should not be set.

Environment

  • Kendo UI version: 2021.1.330
  • Browser: [all]
Unplanned
Last Updated: 18 Mar 2021 12:53 by ADMIN

Issue

Using any overload of ToDataSourceResult(Async) with a DataSourceRequest containing filter descriptors on an IQueryable provided by Entity Framework core 2.x, causes Entity Framework's "Query cache" to fill up for different filter values, leaking memory in the process. This is caused by using Expression.Constant in the generated expression trees for a DataSourceRequest's FilterDescriptors. Refer to https://github.com/dotnet/efcore/issues/14859 for more details about why this leaks memory.

Since Entity Framework's cache is always missed for new filter values, performance is also degraded due to this issue.

The issue is not present when using Entity Framework core 3 or greater. Apparently using Expression.Constant is not an issue on these version.

I have attached a minimal working example that illustrates the memory leak.

Fix

This issue can be fixed by changing FilterDescriptorExpressionBuilder.CreateValueExpression to not return a ConstantExpression, but a MemberExpression instead. Entity Framework 2.x will correctly parameterize the MemberExpression, causing the query cache to be hit correctly for queries that only differ in parameter values. It won't parameterize ConstantExpressions. Refer to https://stackoverflow.com/a/60516780/147993 for an example of generating a MemberExpression instead of a ConstantExpression.

Unplanned
Last Updated: 10 Dec 2020 08:45 by Cyril Iselin

Bug report

When the Model for the Grid inherits the CustomTypeDescriptor, an error is thrown.

Reproduction of the problem

  1. Open the attached sample project -
    TelerikAspNetCoreApp3.zip

  2. Load the About page

Current behavior

The following error is thrown:

An unhandled exception occurred while processing the request.
InvalidOperationException: Bound columns require a field or property access expression.
Kendo.Mvc.UI.GridBoundColumn<TModel, TValue>..ctor(Grid grid, Expression<Func<TModel, TValue>> expression)

Expected/desired behavior

The view should load without any errors

Environment

  • Kendo UI version: 2020.3.1118
  • Browser: [all ]
Completed
Last Updated: 09 Nov 2020 12:44 by ADMIN
Created by: Aaron
Comments: 1
Category: UI for ASP.NET Core
Type: Bug Report
1

When assigning the Name of a Telerik UI control, the value specified is used for both the name and id attributes of HTML elements. If the value specified contains a period (ex. a property of a complex model property, ex. Model.Address.Line1) then the "name" attribute will still contain the period (ex. "Address.Line1") but because periods are invalid for the "id" attribute, the periods should get replaced with an underscore by default (ex. "Address_Line1"). Using HTML helpers, this appears to be happening correctly. Using Tag Helpers, on the other hand, does not appear to be sanitizing the id values and instead leaves the period, causing an invalid value to be used and inconsistent results when compared to the HTML Helpers.

 

Example using the ListBox component:

// Tag Helper, generates this: <select id="ComplexModelProperty.ListBoxTagHelper" name="ComplexModelProperty.ListBoxTagHelper">
<kendo-listbox name="ComplexModelProperty.ListBoxTagHelper" bind-to="new List<string>()"></kendo-listbox>

// HTML Helper, generates this: <select id="ComplexModelProperty_ListBoxHtmlHelper" name="ComplexModelProperty.ListBoxHtmlHelper">
@(Html.Kendo().ListBox()
  .Name("ComplexModelProperty.ListBoxHtmlHelper")
  .BindTo(new List<string>())
)

Example using the Button component:

// Tag Helper, generates this: <button id="ComplexModelProperty.ButtonTagHelper" name="ComplexModelProperty.ButtonTagHelper" type="button">
<kendo-button name="ComplexModelProperty.ButtonTagHelper">Image icon</kendo-button>

// HTML Helper, generates this: <button id="ComplexModelProperty_ButtonHtmlHelper" name="ComplexModelProperty.ButtonHtmlHelper" type="button">
@(Html.Kendo().Button()
      .Name("ComplexModelProperty.ButtonHtmlHelper")
      .HtmlAttributes(new { type = "button" })
      .Content("Image icon"))

I only tested with these two components to verify this wasn't an issue specific to the ListBox component, but I'm assuming this is a problem with any component when using Tag Helpers. After looking at some of the relevant code, I'm guessing this could be corrected by updating the GenerateId() method in the TagHelperBase class (ex. by calling something like GenerateIdFromName() that would handle sanitizing the value).

I also found this forum post from over two years ago reporting what appears to be this same issue. There was a reply that acknowledged the issue and offered a workaround "until this issue is fixed", however after two years I would think something like this would have already been fixed (a bug that applies to all Tag Helpers, results in invalid HTML being generated, and can be fixed by using a built-in .NET method that was created specifically for this purpose).

Declined
Last Updated: 29 Oct 2020 05:31 by ADMIN
Created by: Akesh Gupta
Comments: 0
Category: UI for ASP.NET Core
Type: Bug Report
0

Bug report

The StringExtensions -> ToCamelCase method(part of Kendo.Mvc.Extenstions) doesn't return the expected Camel case result.

  • More details in ticket # 1458202

Reproduction of the problem

Include the Kendo.Mvc.Extenstions namespace. Define the following in a controller:

        public IActionResult Index()
        {
            string test = "RANDOMStatusId";
            test = test.ToCamelCase();

            return View();
        }

Set a debugger and see the value of the "test" variable.

Current behavior

The returned from the ToCamelCase() method value is "rANDOMStatusId"
image

Expected/desired behavior

The expected result returned from the ToCamelCase() method value is "randomStatusId"

Environment

  • Kendo UI version: 2020.1.219
  • jQuery version: x.y
  • Browser: [all]
Completed
Last Updated: 20 Oct 2020 13:41 by ADMIN

Bug report

Reproduction of the problem

  1. Run the project attached on in 16.9.2020 in Ticket ID: 1484793
  2. Check the "Add 3rd Step" checkbox
  3. Navigate to the 3rd step - the Rating is unresponsive and its value cannot be changed

Current behavior

The Rating is unresponsive.

Expected/desired behavior

The Rating works properly.

Environment

  • Kendo UI version: 2020.2.617
  • jQuery version: x.y
  • Browser: [all ]
Completed
Last Updated: 09 Oct 2020 10:56 by ADMIN
Release 2020.R3.SP.next
Such mechanism is available for the Kendo HTML helper methods (ToClientTemplate). But similar mechanism is missing from the Tag Helpers. 
Completed
Last Updated: 28 Sep 2020 15:25 by ADMIN
Release 2020.R3.SP.next
Created by: Emmsa
Comments: 0
Category: UI for ASP.NET Core
Type: Bug Report
0

Bug report

Reproduction of the problem

The kendo.common-bootstrap.min.css file contains the following rule:

.k-time-container{padding-right:100px;padding-left:100px;margin-left:-100px;margin-right:-100px;margin-"left":-117px}

that sets margin-left incorrectly: margin-"left"

Current behavior

Expected/desired behavior

Environment

  • Kendo UI version: 2020.3.915
  • jQuery version: x.y
  • Browser: [all]
Planned
Last Updated: 20 Mar 2020 06:53 by ADMIN

Bug report

Validation attributes are not rendered on Kendo editors if ViewData contains same key as the model.

Reproduction of the problem

@{
  ViewData["Title"] = "Home Page"; 
}

@using (Html.BeginForm())
{
  @Html.Kendo().TextBoxFor(model => model.Title)
}

<script>
  $(function () {
    $("form").kendoValidator();
  });
</script>

Current behavior

Validation attributes are not rendered.

Expected/desired behavior

Validation attributes should be rendered on the input element.

Environment

  • Kendo UI version: 2020.1.219
  • Browser: [all]
Completed
Last Updated: 19 Mar 2020 15:20 by ADMIN
Release 2020.R1.SP.next

The Menu TagHelper does not render correct links for its items when the asp-page attribute is used.

With area it does not render a link at all:
<menu-item text="Home" asp-area="Products" asp-controller="Home" asp-action="About"></menu-item>

Without area it renders an incorrect link
<menu-item text="Login" asp-area="Products" asp-page="/Books"></menu-item>


Completed
Last Updated: 05 Feb 2020 10:59 by ADMIN
Release 2020.R1.SP.next

When a model property is decorated with data annotation attributes, the RadioButton HtmlHelper does not properly render the data-val and data-val-required attributes on the element.

Expected behavior:  Data attributes should be successfully rendered on the <input> element.

Completed
Last Updated: 11 Oct 2019 11:55 by ADMIN
Release 2019.R3.SP.next
Created by: محمد
Comments: 4
Category: UI for ASP.NET Core
Type: Bug Report
2

Using .Net Core 3.0

ToDataSourceResult raises an exception if the DataSourceRequest has Aggregates

the exception says that there is no constructor with the following signature:

Void Microsoft.CodeAnalysis.CSharp.CSharpCompilationOptions(
	Microsoft.CodeAnalysis.OutputKind, 
	Boolean, 
	String, 
	String, 
	String, 
	Collections.Generic.IEnumerable`1<String>, 
	Microsoft.CodeAnalysis.OptimizationLevel, 
	Boolean, 
	Boolean, 
	String, 
	String, 
	Collections.Immutable.ImmutableArray`1<Byte>, 
	Nullable`1<Boolean>, 
	Microsoft.CodeAnalysis.Platform, 
	Microsoft.CodeAnalysis.ReportDiagnostic, 
	Int32, 
	IEnumerable<KeyValuePair<String,Microsoft.CodeAnalysis.ReportDiagnostic>>, 
	Boolean, 
	Boolean, 
	Microsoft.CodeAnalysis.XmlReferenceResolver, 
	Microsoft.CodeAnalysis.SourceReferenceResolver, 
	Microsoft.CodeAnalysis.MetadataReferenceResolver, 
	Microsoft.CodeAnalysis.AssemblyIdentityComparer, 
	Microsoft.CodeAnalysis.StrongNameProvider, 
	Boolean, 
	Microsoft.CodeAnalysis.MetadataImportOptions, 
	Microsoft.CodeAnalysis.CSharp.NullableContextOptions
)

 

I traced the error down to the method that causes it :

CSharpCompilation CreateCompilation(SyntaxTree syntaxTree)
maybe it needs to use an updated Microsoft.CodeAnalysis.CSharp nuget that supports .Net Core 3.0

 

 

Unplanned
Last Updated: 23 Apr 2019 10:50 by ADMIN
Created by: Joshua
Comments: 0
Category: UI for ASP.NET Core
Type: Bug Report
1

Trying to attach an event to the Core Sparkline wrapper like this:

@(Html.Kendo().Sparkline()
                .Name("temp-log")
                .Type(SparklineType.Column)
                .Data(new double[] {
                16, 17, 18, 19, 20, 21, 21, 22, 23, 22
            })
            .Events(e=>e.SeriesClick("onSeriesClick"))
)

leads to a compilation error:

Error CS0121 The call is ambiguous between the following methods or properties: 'SparklineBuilder<T>.Events(Action<ChartEventBuilder>)' and 'SparklineBuilder<T>.Events(Action<SparklineEventBuilder>)'


Unplanned
Last Updated: 05 Apr 2019 13:22 by ADMIN
Created by: Mhd.Ahd
Comments: 0
Category: UI for ASP.NET Core
Type: Bug Report
1

Dears,

While browsing the new components of UI for Asp Core, I found an Issue in the provided online sample (https://demos.telerik.com/aspnet-core/ripplecontainer/index)

After transferring and moving items between the lists of "RIPPLE ON LIST ITEMS", the list display the raw HTML of the items. So, I provided a screen record reproducing the issue (https://pasteboard.co/I7Fx0AW.gif).

Unplanned
Last Updated: 28 Feb 2019 12:34 by ADMIN
Created by: CLOCA
Comments: 0
Category: UI for ASP.NET Core
Type: Bug Report
3

When certain options of the editable Window are set through configuration, they are not being serialized correctly:

MinWidth
MinHeight
Events (Open, Close, etc.)

@(Html.Kendo().Scheduler<TelerikAspNetCoreAppScheduler.Models.TaskViewModel>()
   .Editable(e => e.Window(w => 
      w.MinHeight(1000)
        .MinWidth(1000)
        .Events(we => we.Open('onOpen'))))
)


Unplanned
Last Updated: 05 Dec 2018 16:43 by ADMIN
View:
@page
@model IndexModel
@{
    ViewData["Title"] = "Home page";
}
 
<form class="form-horizontal" method="post">
    <h4>Standard textbox:</h4>
    @Html.TextBoxFor(m => m.Candidate.CandidateId)
 
    <h4>Kendo textbox:</h4>
    @Html.Kendo().TextBoxFor(model => model.Candidate.FirstName)
    <div class="form-group">
        <div>
            <button type="submit" class="btn btn-default">Submit</button>
        </div>
    </div>
</form>

Back end:
public class IndexModel : PageModel
{
    [BindProperty]
    public CandidateViewModel Candidate { get; set; }
 
    public void OnGet()
    {
 
    }
 
    public void OnPost()
    {
        ViewData["firstname"] = $"{Candidate.FirstName}";
        ViewData["candidateid"] = $"{Candidate.CandidateId}";
    }
}

Model:
public class CandidateViewModel
{
    [Key]
    [Display(Name = "Candidate ID")]
    public int CandidateId { get; set; }
 
    [Required]
    [Display(Name = "First Name")]
    public string FirstName { get; set; }
}

Inspect the TextBox and Kendo TextBox helpers in the browser. The latter does not render data-val and data-val-required attributes.