Unplanned
Last Updated: 04 Aug 2022 08:48 by Holger
Created by: Holger
Comments: 0
Category: Scheduler
Type: Bug Report
2

Hi,

I have a recurrent event with the following dates:

"Start": "2022-08-01T07:00:00",
"End": "2022-08-01T08:00:00",
"RecurrenceRule": "FREQ=DAILY;UNTIL=2022-08-04T05:00:00"

https://datatracker.ietf.org/doc/html/rfc5545#section-3.3.10 says:

The UNTIL rule part defines a DATE or DATE-TIME value that bounds the recurrence rule in an inclusive manner.  If the value  specified by UNTIL is synchronized with the specified recurrence, this DATE or DATE-TIME becomes the last instance of the recurrence.  The value of the UNTIL rule part MUST have the same value type as the "DTSTART" property

I generated the events with Thunderbird, synchronized to the caldav-Server and read it from there. 

In the Telerik Scheduler I got only 3 occurences of the event: from the 1st to the 3rd.

In Thunderbird I got 4. From the 1st to the 4th. According with the RFC, Thunderbird is right :-) 

----------------------- ADMIN EDIT -----------------------

The recurrence generation currently considers the time in the recurring rules. To workaround the issue, you should manually change the until parameter to contain the maximum possible hour, minute and second for the day. Here is an example:

 

// item is your appointment item

var rule = RecurrenceRule.Parse(item.RecurrenceRule); if(rule.Until.HasValue) { var untilDate = rule.Until.Value; rule.Until = new DateTime(untilDate.Year, untilDate.Month, untilDate.Day, 23, 59, 59); } item.RecurrenceRule = rule.ToString();

 

 

--------------------------------------------------------------------

Completed
Last Updated: 23 May 2025 08:31 by ADMIN
Release 9.0.0
Created by: Holger
Comments: 0
Category: Scheduler
Type: Bug Report
2

I have created an event series with the following RecurrenceRule:

RecurrenceRule = "FREQ=DAILY;BYDAY=MO,TU,WE,TH,FR"

However, it looks like the collection of days is not taken into consideration and the events are created for every day of the week as if I have only set:

RecurrenceRule = "FREQ=DAILY"

---

ADMIN EDIT

---

A possible workaround for the time being is to use  "FREQ=WEEKLY" and extend the occurrence to the desired days of the week. For example, targeting the "Morning run" appointment: https://blazorrepl.telerik.com/cQuiFGOK01nSotIT28.

Unplanned
Last Updated: 22 Aug 2022 14:22 by Shannon
Created by: Shannon
Comments: 0
Category: Scheduler
Type: Feature Request
2
I'd like to have the ability to export the Scheduler appointments to iCalendar.
Unplanned
Last Updated: 19 Sep 2022 16:25 by Support ATT
Created by: Support ATT
Comments: 0
Category: Scheduler
Type: Feature Request
2
Please add support for grouping by date similar to https://demos.telerik.com/kendo-ui/scheduler/date-grouping.
Completed
Last Updated: 14 Nov 2024 09:28 by ADMIN
Release 7.0.0

Scheduler cells are not aligned correctly in the Timeline View when Bootstrap Theme is used.

To reproduce the problem:

 1. Open the following Scheduler Demo:
 https://demos.telerik.com/blazor-ui/scheduler/overview

 2. Select the Bootstrap Theme

 3. Open the Timeline View

Duplicated
Last Updated: 09 Mar 2023 10:00 by ADMIN
Created by: Joris
Comments: 1
Category: Scheduler
Type: Feature Request
2

Hello,

Sadly it appears there is no current time marker feature available for the scheduler.

Any chance that this could be implemented in the future?

Kind greetings

Completed
Last Updated: 20 Mar 2023 15:26 by ADMIN
Release 4.2.0 (26/04/2023)
Created by: n/a
Comments: 0
Category: Scheduler
Type: Bug Report
2
By design, the appointments should be resized and repositioned upon browser resize. As of UI for Blazor 3.7., the appointments are not properly scaled upon browser resize.
Completed
Last Updated: 08 Aug 2023 06:34 by ADMIN
Release 4.5.0 (08/30/2023) (R3 PI2)

Event Popup Edit: Object of type 'Telerik.Blazor.Components.Scheduler.Models.Resource' cannot be converted to type 'System.String'.

When try to click on the Save button in an Event Scheduler Popup window, an error appears.

crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
      Unhandled exception rendering component: Object of type 'Telerik.Blazor.Components.Scheduler.Models.Resource' cannot be converted to type 'System.String'.
System.ArgumentException: Object of type 'Telerik.Blazor.Components.Scheduler.Models.Resource' cannot be converted to type 'System.String'.
   at System.RuntimeType.CheckValue(Object& value, ParameterCopyBackAction& copyBack, Binder binder, CultureInfo culture, BindingFlags invokeAttr)
   at System.Reflection.MethodBase.CheckArguments(Span`1 copyOfParameters, IntPtr* byrefParameters, Span`1 shouldCopyBack, ReadOnlySpan`1 parameters, RuntimeType[] sigTypes, Binder binder, CultureInfo culture, BindingFlags invokeAttr)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
   at System.Reflection.PropertyInfo.SetValue(Object obj, Object value, Object[] index)
   at System.Reflection.PropertyInfo.SetValue(Object obj, Object value)
   at Telerik.Blazor.Extensions.ReflectionExtensions.SetPropertyValue(Object target, String propertyName, Object value)
   at Telerik.Blazor.Components.TelerikScheduler`1.<OnFormSubmitButtonClick>d__323[[PGS50.Client.Pages.XTest.SchedulerAppointment, PGS50.Client, Version=0.5.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)
Declined
Last Updated: 29 Sep 2026 07:31 by ADMIN

I am trying to look at the times 7pm - midnight.  But if I set the end time to midnight, I get an error that the end time has to be greater than the start time.  How do I set the timeline to show 7pm - midnight or 8pm - 2am?

I tried including the next date in the EndTime but the Scheduler does not take the date into consideration, it checks only the time portion.

Unplanned
Last Updated: 18 Sep 2024 11:53 by Mike
Created by: Mike
Comments: 0
Category: Scheduler
Type: Feature Request
2
I am using resource grouping with Day view only. I have 5 groups and showing the date for each column/group is repetitive, and a waste of screen space. I want to remove the date header as I am already displaying the date in a different element on the page.
Unplanned
Last Updated: 09 Dec 2024 10:07 by Federico
Created by: Federico
Comments: 0
Category: Scheduler
Type: Feature Request
2
The TimeColumn of the Agenda view displays the time in a 12-hour format by default. I want to be able to specify 24-hour format for the time.
Unplanned
Last Updated: 28 Jul 2025 16:11 by David Klein
How can I implement auto-scrolling in the Telerik Scheduler when dragging an appointment outside the visible viewport? I want the scheduler to automatically scroll in the appropriate direction to bring the dragged appointment into view.
Completed
Last Updated: 28 Aug 2026 09:32 by ADMIN
Release 2026 Q4 (Nov)
Created by: Emma
Comments: 5
Category: Scheduler
Type: Bug Report
2

I have been having issues adding the month view to a Telerik Blazor scheduler component, when there is grouping. It gives a null reference error any time I try to switch to the month view. I also tried it using the available demo for grouping in Telerik REPL, the only difference I found between my code and the demo was that I had used the ItemsPerSlot parameter.  I added this to the demo, and was able to reproduce the error I was seeing, and I have attached the console output from the REPL demo. I believe there is either a bug with the ItemsPerSlot being used in conjunction with grouping on a scheduler component, or some instruction missing from how to set it up properly to prevent this null reference issue. 

Changed code:

<SchedulerMonthView ItemsPerSlot="5"></SchedulerMonthView>

Demo used:

Blazor Scheduler (Event Calendar) Demos - Grouping | Telerik UI for Blazor

 


Completed
Last Updated: 31 Aug 2026 05:17 by ADMIN
Release 2026 Q4 (Nov)

Description

Appointment editing does not work on Chrome for mobile (Android).

Steps To Reproduce

Run the following demo in the Chrome for mobile browser, on a mobile device with Android : https://demos.telerik.com/blazor-ui/scheduler/appointment-editing

  1. Attempt to edit an appointment by double tapping it

Actual Behavior

The popup editor does not show up.

Expected Behavior

The popup editor shows up.

Browser

Chrome

Last working version of Telerik UI for Blazor (if regression)

No response

Unplanned
Last Updated: 11 Sep 2025 09:59 by Marco
Created by: Marco
Comments: 0
Category: Scheduler
Type: Feature Request
2
I'd like to select multiple appointments on the Scheduler timeline, and drag/drop them inside another slot.
Unplanned
Last Updated: 09 Jun 2026 12:02 by Folkert

Bug report

Reproduction of the problem

(bug report only)
The issue is reproducible when SlotDivisions is set to 1. If it is set to 2, or 3, the events are displayed correcty.
1. Run the following example: https://blazorrepl.telerik.com/wKOgYNbv564C2KOK04

Current behavior

(optional)
Events overlap.

Expected/desired behavior

Events are shown stacked.

Environment

  • Kendo/Telerik version: 14.0.0
  • Browser: [all ]
Unplanned
Last Updated: 30 Jun 2020 14:21 by ADMIN
Created by: How PK
Comments: 3
Category: Scheduler
Type: Feature Request
1
I would like to be able to set overnight display for the Scheduler, for example, to see overnight working shifts. 
Completed
Last Updated: 13 Jan 2021 21:12 by Mallika
Release 2.17.0
Created by: Vic
Comments: 1
Category: Scheduler
Type: Bug Report
1
When the view modes options (Month, day, week, etc...) is collapsed and the arrow is clicked, the drop menu shows behind the main scheduler window.
Unplanned
Last Updated: 08 Mar 2021 08:04 by ADMIN
Created by: Wes
Comments: 0
Category: Scheduler
Type: Feature Request
1

I am using resources in the scheduler and I need to require the user to select a resource from the list when adding an appointment. Maybe a "Required" option when you declare the resource?

---

ADMIN EDIT

At the moment, a custom edit form is the only option: https://github.com/telerik/blazor-ui/tree/master/scheduler/custom-edit-form

If you need to add resources only in one mode (edit or insert), please provide an example of how you would expect that to be controller through data annotations since they would be in effect in both modes if used.

---

Declined
Last Updated: 07 Jan 2026 12:34 by ADMIN
Created by: Marco
Comments: 4
Category: Scheduler
Type: Bug Report
1

That's pretty weird but nevertheless very specific: if the Scheduler is loaded with POCO objects from EntityFramework with LazyLoading enabled (Castle.Proxies objects) them the k-event-drag-hint box is not shown (!)

 

It took me some time to figure it out...