aspnet-js-aspxclientgantt-f1844a0a.md
Occurs before the edit dialog is shown.
TaskEditDialogShowing: ASPxClientEvent<ASPxClientGanttTaskEditDialogShowingEventHandler<ASPxClientGantt>>
The TaskEditDialogShowing event's data class is ASPxClientGanttTaskEditDialogShowingEventArgs. 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. |
| hiddenFields | Specifies hidden fields in the edit dialog. |
| key | Specifies the task key. |
| readOnlyFields | Specifies read-only fields in the edit dialog. |
| values | Specifies the task values. |
Run Demo: ASPxGantt - Client-Side Events Run Demo: MVCxGantt - Client-Side Events
Use the TaskEditDialogShowing event to customize the edit dialog before it is invoked.
Web Forms:
<dx:ASPxGantt ID="Gantt" >
<ClientSideEvents TaskEditDialogShowing="function(s, e) {
e.values["Subject"]= "Custom dialog text";
e.readOnlyFields.push("Subject");
e.hiddenFields.push("PercentComplete");
}" />
</dx:ASPxGantt>
MVC:
@Html.DevExpress().Gantt(settings => {
settings.Name = "gantt";
settings.ClientSideEvents.TaskEditDialogShowing = "function (s, e) {
e.values["Subject"]= "Custom dialog text";
e.readOnlyFields.push("Subject");
e.hiddenFields.push("PercentComplete");
}";
...
}).Bind(
GanttDataProvider.Tasks, GanttDataProvider.Dependencies,
GanttDataProvider.Resources, GanttDataProvider.ResourceAssignments
).GetHtml()
Result:
Note that the readOnlyFields and hiddenFields event parameters affect only task fields. Use the AllowTaskResourceUpdate property to hide the Resource Manager in the Task Details dialog.
See Also
Online Example: How to Implement a Custom "Task Details" Dialog