ConnectionProviderSql.RegisterCustomAggregate(ICustomAggregateFormattable) Method

Registers a custom aggregate function to use in any CriteriaOperator-based criteria in your application.

Namespace: DevExpress.Xpo.DB

Assembly: DevExpress.Data.v19.2.dll

Declaration

C#

public void RegisterCustomAggregate(
    ICustomAggregateFormattable customAggregate
)

VB.NET

Public Sub RegisterCustomAggregate(
    customAggregate As ICustomAggregateFormattable
)

Parameters

Name	Type	Description
customAggregate	ICustomAggregateFormattable	A custom aggregate function to register.

Remarks

To search for a specific registered custom function, call the CriteriaOperator.GetCustomAggregate function.

Note

• The RegisterCustomAggregate method throws an exception if the customAggregate has already been registered.
• The customAggregate must have a unique Name property value. If you use standard aggregate names (Min, Max, Sum, Avg, Single, Exists, and Count), an exception is raised.