PredicateDescription Class

Represents a dynamically built predicate.

Object Model

Syntax

Visual Basic
C#

'Declaration
 
Public Class PredicateDescription

'Usage
 
Dim instance As PredicateDescription

public class PredicateDescription

Remarks

Use either the constructor or PredicateBuilder.Make to create a PredicateDescription. You can combine predicates using the And and Or methods of the PredicateBuilder. You can build a filtered query using PredicateBuilder.FilterQuery or create a lambda expression from the predicate using ToLambdaExpression.

Example

public void PredicateBuilderMake() {
  var mgr = new DomainModelEntityManager();

  var expr1 = PredicateBuilder.Make(typeof(Product), "UnitPrice", FilterOperator.IsLessThanOrEqualTo, 10);
  var expr2 = PredicateBuilder.Make(typeof(Product), "Discontinued", FilterOperator.IsEqualTo, false);

  var results = mgr.Products.Where(expr1.And(expr2)).ToList();
}

Inheritance Hierarchy

System.Object
IdeaBlade.Linq.PredicateDescription

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PredicateDescription Members
IdeaBlade.Linq Namespace