IPrxReport.AddEventHandler

Syntax

AddEventHandler(Events: IPrxReportUserEvents): Integer;

Parameters

Events. Event handler.

Description

The AddEventHandler method adds an event handler into the report. The method returns index of the event handler. This method is an alternative to the IPrxAssemblies.EventsClass property.

Example

To execute the example, create a unit (see below unit text), then create a regular report, for which determine the created unit as an event handler (specify the EventsClass class). Create two hyperlinks in the report: the first one executes the AddEventHandler procedure, the second one executes the RemoveEventHandler procedure.

Var i: Integer;
Class EventsClass: ReportEvents
    //event after report export
    Public Sub OnAfterExportReport(Report: IPrxReport);
    Begin
        WinApplication.InformationBox("Report export «" + Report.Name + "» complete");
    End Sub OnAfterExportReport;
End Class EventsClass;

Class MyEventsClass: ReportEvents
    //event before saving report
    Public Sub OnBeforeSaveReport(Report: IPrxReport; Var Cancel: Boolean);
    Begin
        If Not WinApplication.ConfirmationBox("Save data?") Then
        Cancel := True;
        End If;
    End Sub OnBeforeSaveReport;
End Class MyEventsClass;

Public Sub AddEventHandler;
Var
    Ev: MyEventsClass;
Begin
    Ev := New MyEventsClass.Create;
    i := PrxReport.ActiveReport.AddEventHandler((Ev As IPrxReportUserEvents));
End Sub AddEventHandler;

Public Sub RemoveEventHandler;
Begin
    PrxReport.ActiveReport.RemoveEventHandler(i);
End Sub RemoveEventHandler;

After clicking the hyperlink that executes the AddEventHandler procedure, the report will use the MyEventsClass handler. To check them, modify the report, save the changes and export data. After clicking the hyperlink that executes the RemoveEventHandler procedure the earlier added event handler is removed.