IMetaAttributeBreadcrumbReplaceItemEventArgs.Attribute

Syntax

Attribute: String;

Description

The Attribute property returns attribute identifier to be replaced.

Comments

This property returns identifier of the attribute that substitutes the current element corresponding to an attribute of time series database. Checking by attribute identifiers the substitution may be prohibited by setting corresponding value to the Allow property.

Example

Executing the example requires a form with the Button1 button and the MetaAttributesBreadcrumb component named MetaAttributesBreadcrumb1. This component is connected to a time series database. The specified procedure is set for MetaAttributeBreadcrumb1 as a handler of the OnBeforeReplaceItem event.

Sub MetaAttributesBreadcrumb1OnBeforeReplaceItem(
    Sender: Object; Args: IMetaAttributeBreadcrumbReplaceItemEventArgs);
Var
    Item: IMetaAttributeBreadcrumbItem;
Begin
    Item := Args.Item As IMetaAttributeBreadcrumbItem;
    If (Item.MetaAttribute.Id = "DL") And (Args.Attribute = "COUNTRY") Then
        Args.Allow := False;
    End If;
End Sub MetaAttributesBreadcrumb1OnBeforeReplaceItem;

When the event occurs, attributes identifiers are checked. If replaceable element corresponds to an attribute with the DL identifier, and the user tries to replace it by an attribute with the COUNTRY identifier, substitution is denied.