Unplanned
Last Updated: 24 Jun 2025 08:01 by Clemens

The application can trigger edit mode through the Gantt state, similar to the how you can trigger edit mode programmatically in the Grid. However, in this case, the Gantt edit form does not show the tabs for editing dependencies and custom model properties.

Test page with a possible JavaScript-based workaround (it requires the item to edit to be rendered:

https://blazorrepl.telerik.com/cpOKmIuC29Unl2B429

Unplanned
Last Updated: 17 Jun 2025 08:22 by Folkert

When double-clicking a task in the Gantt Timeline, the popup edit form may not appear. Instead, the vertical blue band for task dragging may show.

The problem is more likely to occur when using a touchpad.

Completed
Last Updated: 23 May 2025 08:34 by ADMIN
Release 9.0.0

I am trying to make the Blazor Gantt control fill a container width and height.

If I set the height of the Gantt control to 100%, it resizes to fill the container except for the tree part of the Gantt control as it stays at whatever size the window was when it first loaded.

===== ADMIN EDIT =====

Meanwhile, as a workaround, you can add a bool flag that will refresh the whole Gantt upon resizing the container. Here is an example of this approach I have prepared at the following REPL link.

You may notice a little flick with this workaround. However, you can cover it with a short loader.
Won't Fix
Last Updated: 12 Feb 2025 08:19 by ADMIN

The Tooltip Template of the Gantt behaves strangely in a WASM application. It flickers and does not display any information. Reproduction in REPL which is essentially a WASM app: https://blazorrepl.telerik.com/QQFEapOg56MCIhIK48.

The issue is not reproducible in a server-side application using the same code.

Completed
Last Updated: 14 Nov 2024 09:26 by ADMIN
Release 7.0.0
Completed
Last Updated: 06 Nov 2024 07:39 by ADMIN

Adding a new appointment in the Gantt throws an System.ArgumentNullException. The issue can be reproduced only in WASM application.

Steps To Reproduce:

  1. Run REPL example
  2. Double-click on some appointment in the timeline
  3. Go to Predecessors tab
  4. Try to Add new item
Completed
Last Updated: 23 Aug 2023 12:40 by ADMIN
Release 4.5.0 (08/30/2023) (R3 PI2)
Gantt dependencies are not rendered correctly in the latest Chrome
Completed
Last Updated: 22 Aug 2023 14:49 by ADMIN
Release 4.5.0 (08/30/2023) (R3 PI2)
Set the Display scale to 150%, for example, the dependencies are rendered incorrectly. 
Unplanned
Last Updated: 13 Jul 2023 13:14 by Greg
When the Start and End Dates are far from the DateTime.Now, Gantt freezes the entire application. 
Completed
Last Updated: 01 Jun 2023 20:02 by ADMIN
Release 4.3.0 (06/07/2023) (R2 2023)

I have a page with a Gantt chart and a Button. The button navigates to another page in the app (NavigationManager.NavigateTo()). When I click the button an exception is thrown:

Exception trace: Error: Microsoft.JSInterop.JSException: An exception occurred executing JS interop: The JSON value could not be converted to System.Double. Path: $ | LineNumber: 0 | BytePositionInLine: 4.. See InnerException for more details. ---> System.Text.Json.JsonException: The JSON value could not be converted to System.Double. Path: $ | LineNumber: 0 | BytePositionInLine: 4.
 ---> System.InvalidOperationException: Cannot get the value of a token type 'Null' as a number.

Unplanned
Last Updated: 04 Nov 2022 17:29 by Ivan

1. Go to https://demos.telerik.com/blazor-ui/gantt/templates

2. Scroll to the end of the timeline horizontally

3. Move the mouse pointer to timelineTooltip appears in the wrong place

Unplanned
Last Updated: 06 Jun 2022 11:04 by ADMIN
Created by: René
Comments: 1
Category: Gantt
Type: Bug Report
2
The FilterMenuType Parameter is available for GanttColumns but is is ignored.  The FilterMenuType of TelerikGantt is always used.
Completed
Last Updated: 11 Nov 2021 13:53 by Benjamin
Release 2.29.0
Gantt dependencies do not render correctly under German (Deutschland) culture
Unplanned
Last Updated: 09 Sep 2021 08:39 by ADMIN
In the Timeline numeric editor the increase/decrease step is 0.01. However, the increase/decrease step of the Gantt Tree numeric editor is 1.  This allows you to increase the Percent Complete value to higher than 1(standing for 100%) and thus break the component.
Completed
Last Updated: 09 Sep 2021 08:30 by ADMIN
Release 2.27.0
The Timeline is not rendered correctly. I have to click anywhere in the Tree to render the Timeline.