ContainsOperator Class

An operator which checks if a collection contains at least one object matching a specific criteria.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v19.2.dll

Declaration

C#

public sealed class ContainsOperator :
    AggregateOperand

VB.NET

Public NotInheritable Class ContainsOperator
    Inherits AggregateOperand

Remarks

The ContainsOperator operator can be used to filter the contents of the XPCollection.

It’s also possible to use the CriteriaOperator.Parse method to create a CriteriaOperator operator for a specific expression.

Example

This sample code selects Person objects that contain at least one object in their Addresses collection property with the City property set to “Chicago”

The image below shows the result:

C#

xpCollection1.Filter = new ContainsOperator("Addresses", new BinaryOperator("City", "Chicago"));
//or
xpCollection1.Filter = CriteriaOperator.Parse("[Addresses][[City] = ?]", "Chicago");

VB.NET

xpCollection1.Filter = New ContainsOperator("Addresses", New BinaryOperator("City", "Chicago"))
'or
xpCollection1.Filter = CriteriaOperator.Parse("[Addresses][[City] = ?]", "Chicago")

Inheritance

Object

CriteriaOperator

AggregateOperand

ContainsOperator