BinaryOperator Class

A logical expression which consists of a BinaryOperatorType operation between two operands.

Namespace: DevExpress.Data.Filtering

Assembly: DevExpress.Data.v23.2.dll

NuGet Package: DevExpress.Data

Declaration

C#

public class BinaryOperator :
    CriteriaOperator

VB.NET

Public Class BinaryOperator
    Inherits CriteriaOperator

Related API Members

The following members return BinaryOperator objects:

• BinaryOperator.Clone()

Remarks

The BinaryOperator can be used in search criteria to filter objects. For more information, refer to Simplified Criteria Syntax, Criteria Operators, and NULL Value Handling Specifics.

Tip

You can find examples in the following article: Build Criteria - Cheat Sheet.

Examples

The following code demonstrates how to get a collection of “MyObject” objects that match specific criteria. The collection returned is used as a data source for a grid control. In this example, objects that have a value equal to or greater than 20 in their “UnitPrice” field are returned. To create the filter criteria a specific BinaryOperator operator is used.

C#

using DevExpress.Xpo;
using DevExpress.Data.Filtering;

// Custom XP object.
class MyObject : XPObject {
   decimal unitPrice;

   public decimal UnitPrice {
      get { return unitPrice; }
      set { unitPrice = value; }
   }
   //...
}

// Select MyObject objects that match the specified criteria.
decimal filterValue = 20;
gridControl1.DataSource = new XPCollection(Session.DefaultSession, typeof(MyObject), 
  new BinaryOperator("UnitPrice", filterValue, BinaryOperatorType.GreaterOrEqual));

VB.NET

Imports DevExpress.Xpo
Imports DevExpress.Data.Filtering

' Custom XP object.
Public Class MyObject
   Inherits XPObject
   Dim _unitPrice As Decimal

   Public Property UnitPrice() As Decimal
      Get
         Return _unitPrice
      End Get
      Set(ByVal Value As Decimal)
         _unitPrice = Value
      End Set
   End Property
   '...
End Class

' Select MyObject objects that match the specified criteria.
Dim filterValue As Decimal = 20
GridControl1.DataSource = New XPCollection(Session.DefaultSession, GetType(MyObject), _
  New BinaryOperator("UnitPrice", filterValue, BinaryOperatorType.GreaterOrEqual))

Return orders that have price more or equal to 50.

Expression:

LINQ

CriteriaOperator.FromLambda<Order>(o => o.Price >= 50);

Typed

new BinaryOperator(nameof(Order.Price), 50, BinaryOperatorType.GreaterOrEqual);

String

CriteriaOperator.Parse("Price>=50");

Test

Input:

OrderName	Price
Order1	30
Order2	40
Order3	50
Order4	60

The result:

OrderName	Price
Order1	50
Order2	60

Inheritance

Object

CriteriaOperator

BinaryOperator