Represents a dynamically built predicate.

Object Model

Syntax

Visual Basic (Declaration)
Public Class PredicateDescription Implements IdeaBlade.Core.IPredicateDescription

Visual Basic (Usage)	Copy Code
Dim instance As PredicateDescription

C#
public class PredicateDescription : IdeaBlade.Core.IPredicateDescription

C++/CLI
public ref class PredicateDescription : public IdeaBlade.Core.IPredicateDescription

Example

C#	Copy Code
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(); }

Copy Code

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();
}

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.

Inheritance Hierarchy

System.Object
IdeaBlade.Linq.PredicateDescription

Requirements

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family