Express > Express Assembly Classes > LanerBox > LanerBox.OnAddAttribute

LanerBox.OnAddAttribute

Syntax

OnAddAttribute(Sender: Object; Args: ILanerBoxAttributeEventArgs);

Parameters

Sender. The component that generated the event.

Args. Event parameters.

Description

The OnAddAttribute occurs when columns with values of indicator attributes are added to a workbook.

Comments

Parameters of this event cannot be changed. Args.Index returns index of the added attribute.

Example

Executing the example requires a form, the LanerBox component named LanerBox1 on the form and the UiErAnalyzer component that is a data source for LanerBox. A workbook of the time series database should be loaded to UiErAnalyzer1. The Memo component named Memo1 is also available on the form.

The described procedure must be assigned as a handler of the OnAddAttribute event for LanerBox.

Sub LanerBox1OnAddAttribute(Sender: Object; Args: ILanerBoxAttributeEventArgs);
Var
    ColCount: Integer;
Begin
    ColCount := Args.Index + 1;
    Memo1.Lines.Clear;
    Memo1.Lines.Add("Number of additional columns containing attributes: " + ColCount.ToString);
End Sub LanerBox1OnAddAttribute;

After columns containing indicator attribute values are added to the workbook, the Memo1 component shows the number of these columns.