Or<T>(Expression<Func<T,Boolean>>[]) Method

Returns an expression which represents a conditional OR operation of the specified operands.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Shared Function Or(Of T)( _
   ByVal ParamArray expressions() As Expression(Of Func(Of T,Boolean)) _
) As Expression(Of Func(Of T,Boolean))

'Usage
 
Dim expressions() As Expression(Of Func(Of T,Boolean))
Dim value As Expression(Of Func(Of T,Boolean))
 
value = PredicateBuilder.Or(Of T)(expressions)

public static Expression<Func<T,bool>> Or<T>( 
   params Expression<Func<T,bool>>[] expressions
)

Parameters

expressions: Expressions to be OR'ed

Type Parameters

T

Remarks

The resulting expression is an "OrElse" binary expression of all operands provided.

Example

public void OrQuery2() {
  var mgr = new DomainModelEntityManager();
  Expression<Func<Customer, bool>> crit1 = c => c.Country.Equals("Mexico");
  Expression<Func<Customer, bool>> crit2 = c => c.CompanyName.StartsWith("A");
  Expression<Func<Customer, bool>> crit3 = c => c.City.StartsWith("M");

  // 'or' all criteria.
  var finalcrit = PredicateBuilder.Or(crit1, crit2, crit3);
  var results = mgr.Customers.Where(finalcrit).ToList();
}

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

PredicateBuilder Class
PredicateBuilder Members
Overload List