AggregateOperand Class

An aggregate operator which calculates aggregate expressions (MIN, MAX, SUM, etc.)

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v21.2.dll

NuGet Packages: DevExpress.Data, DevExpress.Win.Design

Declaration

C#

public class AggregateOperand :
    CriteriaOperator,
    IAggregateOperand,
    ICustomAggregateOperand

VB.NET

Public Class AggregateOperand
    Inherits CriteriaOperator
    Implements IAggregateOperand,
               ICustomAggregateOperand

Related API Members

The following members return AggregateOperand objects:

Show 14 links

• AggregateOperand.Avg(CriteriaOperator)
• AggregateOperand.Clone()
• AggregateOperand.Count()
• AggregateOperand.Count(CriteriaOperator)
• AggregateOperand.Custom(String, IEnumerable<CriteriaOperator>)
• AggregateOperand.Exists()
• AggregateOperand.Exists(CriteriaOperator)
• AggregateOperand.Max(CriteriaOperator)
• AggregateOperand.Min(CriteriaOperator)
• AggregateOperand.Single(CriteriaOperator)
• AggregateOperand.Sum(CriteriaOperator)
• AggregateOperand.TopLevel(Aggregate, CriteriaOperator)
• AggregateOperand.TopLevel(String, IEnumerable<CriteriaOperator>)
• OperandProperty.Item[CriteriaOperator]

Remarks

The AggregateOperand is used to compose criteria which are based on the collection properties (the “many” end of a one-to-many or many-to-many relationship) to filter the XPCollection. It represents the results of aggregate operations performed on these types of properties.

Note

• AggregateOperand does not support nested expressions and complex property paths like Max(Document.<PersonID>LastName). Only names of owned properties are supported: Max(Document).

• AggregateOperand may produce null instead of zero for an empty collection on a server side.

For more information and examples, see How to: Build Complex Criteria.

Inheritance

Object

CriteriaOperator

AggregateOperand

ContainsOperator