ASPxClientGantt.BeginCallback Event

Occurs when a callback for server-side processing is initiated.

Declaration

BeginCallback: ASPxClientEvent<ASPxClientBeginCallbackEventHandler<ASPxClientGantt>>

Event Data

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

Property	Description
command	Gets a command name that identifies which client action initiated a callback.

Remarks

The BeginCallback and EndCallback events can be used to perform specific client-side actions (for example, to display and hide an explanatory text or picture) while a callback is being processed on the server side.

Web Forms:

ASPX

<dx:ASPxGantt ID="Gantt" ClientInstanceName="clientGantt" >
    <ClientSideEvents
        BeginCallback="function(s, e) { command = e.command; }" 
        EndCallback="function(s, e) { if (command == "UNDO") {...} }"
    />
</dx:ASPxGantt>

MVC:

Razor C#

@Html.DevExpress().Gantt(settings => {
    settings.Name = "gantt";
    settings.ClientSideEvents.BeginCallback = "function (s, e) { // your code }";
    settings.ClientSideEvents.EndCallback = "function (s, e) { // your code }";
    ...
}).Bind(
    GanttDataProvider.Tasks, GanttDataProvider.Dependencies, 
    GanttDataProvider.Resources, GanttDataProvider.ResourceAssignments
).GetHtml()

Concept

• Handle Callback Exceptions on the Client