IndexedAttribute(XElement,XName,IndexingHintAction) Method

A hint to create and use an index on the specified XML attribute. The hint has specified action.

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Shared Function IndexedAttribute( _
   ByVal element As System.Xml.Linq.XElement, _
   ByVal name As System.Xml.Linq.XName, _
   ByVal action As IndexingHintAction _
) As XHint

public static XHint IndexedAttribute( 
   System.Xml.Linq.XElement element,
   System.Xml.Linq.XName name,
   IndexingHintAction action
)

Parameters

element: The element containing the attribute.
name: The name of the attribute to get.
action: The action specified by the hint.

Return Value

The attribute that has the specified name.

Remarks

Hints are used declaratively. They tell LiveLinq query optimizer to create and use an index on this attribute, if possible. When the query is executed, the hint method IndexedAttribute is replaced with the standard LINQ to XML method System.Xml.Linq.XElement.Attribute(System.Xml.Linq.XName). See C1.LiveLinq.Hints for more details.

Example

var query =
    from c in customers
    where (string)c.IndexedAttribute("CustomerID", IndexingHintAction.Mandatory) == "ALFKI"
    select c;

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

XmlExtensions Class
XmlExtensions Members
Overload List