And Method (DynamicQueryExtensions)

Returns CompositePredicateDescription which represents a conditional AND operation of the current PredicateDescription with another.

Syntax

Visual Basic
C#

'Declaration
 
<ExtensionAttribute()>
Public Shared Function And( _
   ByVal predicate As IPredicateDescription, _
   ByVal other As IPredicateDescription _
) As CompositePredicateDescription

'Usage
 
Dim predicate As IPredicateDescription
Dim other As IPredicateDescription
Dim value As CompositePredicateDescription
 
value = DynamicQueryExtensions.And(predicate, other)

[Extension()]
public static CompositePredicateDescription And( 
   IPredicateDescription predicate,
   IPredicateDescription other
)

Parameters

predicate
other: PrecicateDescription to be ANDed with the current predicate

Return Value

A CompositePredicateDescription representing multiple predicates

Exceptions

Exception	Description
System.Exception	PredicateDescriptions can only be combined if their InstanceTypes are the same

Example

public void DynamicQueryAnd() {
  var baseQuery = EntityQuery.Create(typeof(Customer));
  var expr1 = new PredicateDescription("Country", FilterOperator.IsEqualTo, "Mexico");
  var expr2 = new PredicateDescription("CompanyName", FilterOperator.StartsWith, "A");
  var list = manager.ExecuteQuery(baseQuery.Where(expr1.And(expr2)));
}

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

DynamicQueryExtensions Class
DynamicQueryExtensions Members