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Page.CancelBackgroundTask(Integer) Method

  • Artikkeli

Version: Available or changed with runtime version 4.0.

Attempt to cancel a page background task.

Syntax

[Ok := ]  Page.CancelBackgroundTask(TaskId: Integer)

Parameters

Page
 Type: Page
An instance of the Page data type.

TaskId
 Type: Integer
Specifies the ID of the page background task to cancel. The ID is assigned to the task when it is queued by the EnqueueBackgroundTask method.

Return Value

[Optional] Ok
 Type: Boolean
true if the page background task was marked for cancellation; otherwise false.

Example

The following example uses the CancelBackgroundTask method to cancel an existing page background task, based on its task ID.

var​
  WaitTaskId: Integer;​
​
trigger OnAfterGetRecord()​
var​
  TaskParameters: Dictionary of [Text, Text];​
begin​
  if (WaitTaskId > 0) then​
    Currpage.CancelBackgroundTask(WaitTaskId);​
    TaskParameters.Add('Wait', '1000');
    CurrPage.EnqueueBackgroundTask(WaitTaskId, 50100, TaskParameters, 1000, PageBackgroundTaskErrorLevel::Warning);
end;

CurrPage is a system-defined variable. For more information, see System-Defined Variables.

Page Background Tasks
Page Data Type
System-Defined Variables
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