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An HTML5, jQuery-based widget library for building modern web apps.

Results 576 kendo-ui-core issues
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### Bug report When using aggregates with nullable data field in DataTable calling ToDataSourceResult throws a NullReferenceException ### Reproduction of the problem 1. Refer to ticket#1528656 for a runnable example...

Bug
F: DataSource
SEV: Low
S: Wrappers (ASP.NET Core)
Priority 1
FP: Unplanned

### Bug report A specific PDF file (example can be found in ticket : 1493640) shows upside down in DPL case ### Reproduction of the problem Run the DPL processing...

Bug
SEV: Medium
jQuery
S: Wrappers (ASP.NET Core)
FP: Unplanned
C: PDFViewer

## I'm submitting a... * Suggestion for improvement ## Current behavior The exportSelectedToExcel method does not fire the excelExport event of the Grid and this does not allow for any...

Enhancement
C: Grid
jQuery1
FP: Unplanned

**Describe the bug** When using the LESS themes, the row selection feature doesn't behave as expected. The background-color of the selected row disappears as soon as the row stops being...

Bug
jQuery1
Appearance
Priority 1
FP: Unplanned
C:Grid

### Bug report Security Trimming does not work with [custom authorization attributes](https://docs.microsoft.com/en-us/aspnet/core/security/authorization/iauthorizationpolicyprovider?view=aspnetcore-6.0#custom-authorization-attributes) ### Reproduction of the problem When custom authorization attribute is used it is not evaluated and the menu...

Bug
C: Menu
SEV: Medium
S: Wrappers (ASP.NET Core)
FP: In Development

### Bug report When calling the **exportSelectedToExcel** method and passing **true** to it, so that the headers are also exported, a js exception related to the aggregates (count, sum, etc.)...

Bug
SEV: Medium
C: Grid
jQuery1
FP: Completed

### Bug report When you try to append a child item in the Menu, the parent item is replaced instead. **Regression introduced with 2022 R1** ### Reproduction of the problem...

Bug
C: Menu
SEV: Medium
jQuery2
Priority 5
FP: Planned

### Bug report The localization messages for some of the default Grid commands are missing. They are translated in the kendo.messages.he-IL.min.js: https://github.com/telerik/kendo-ui-core/blob/master/src/messages/kendo.messages.he-IL.js#L302 ### Reproduction of the problem 1) Create a...

F: Localization
S: Wrappers (ASP.NET Core)
FP: Unplanned

### Bug report As stated in the docs here: https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/methods/select > The select method will not trigger the [change event](https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/events/change). However this is not true. The select method WILL trigger...

### Bug report The [DropDownButton API](https://docs.telerik.com/kendo-ui/api/javascript/ui/dropdownbutton/configuration/popup) does not expose all configuration options for Popup customization, but only the appendTo configuration option. ### Expected/desired behavior The DropDownButton API should expose the...

Bug
SEV: Low
jQuery2
C: DropDownButton