IPrxReportUserEvents.EventOnBeforeChangeControlValue

Syntax

EventOnBeforeChangeControlValue (Args: IUiPrxControlCancelEventArgs);

Parameters

Args. The parameter, which enables the user to work with event parameters.

Description

The EventOnBeforeChangeControlValue method implements the event that occurs before the value of a regular report control is changed.

Comments

The method enables to redefine the system event that occurs after the ReportEvents.OnBeforeChangeControlValue event.

Example

Executing the example requires that the repository contains a regular report with connected unit. The connected module and the Parent class must be specified as event handler.

Add links to the Report, Ui system assemblies.

Public Class EventsClass: Parent
    Public Sub OnBeforeChangeControlValue(Control: IPrxControl; Var Cancel: Boolean);
    Begin
        //Call system event redetermined in the Parent class
        Inherited OnBeforeChangeControlValue(Control, Cancel);
    End Sub OnBeforeChangeControlValue;
End Class EventsClass;
Class Parent: ReportEvents
    // Handle the EventOnBeforeChangeControlValue event
    Public Sub EventOnBeforeChangeControlValue(Args: IUiPrxControlCancelEventArgs);
    Begin
        WinApplication.InformationBox("Control value will be changed");
    End Sub EventOnBeforeChangeControlValue;
End Class Parent;

After executing the example, before control value changes, the information message is displayed in regular report.

See. also:

IPrxReportUserEvents