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ASPxClientGantt.TaskUpdating Event

Occurs before a user updates a task.


TaskUpdating: ASPxClientEvent<ASPxClientGanttTaskUpdatingEventHandler<ASPxClientGantt>>

Event Data

The TaskUpdating event's data class is ASPxClientGanttTaskUpdatingEventArgs. The following properties provide information specific to this event:

Property Description
cancel Specifies whether to cancel the related action (for example, row edit, export). Inherited from ASPxClientCancelEventArgs.
key Specifies the task key.
newValues Specifies the task’s new values.
values Specifies the task values.


Use the TaskUpdating event to process task data before a task is updated.

Run Demo

<dx:ASPxGantt ID="Gantt" >
    <ClientSideEvents TaskUpdating="onGanttTaskUpdating" ... />
function onGanttTaskUpdating(s, e) {
    if (e.newValues["Subject"].includes("test")) {
        e.cancel = true;


See Also