XmlExtensionsWhereAttribute Method

Finds all attributes in an enumeration of XElement items that match the specified attributeName.

Namespace: GSF.Xml
Assembly: GSF.Core (in GSF.Core.dll) Version: 2.4.181-beta

Syntax

public static IEnumerable<Tuple<XElement, string>> WhereAttribute(
	this IEnumerable<XElement> source,
	string attributeName
)

<ExtensionAttribute>
Public Shared Function WhereAttribute ( 
	source As IEnumerable(Of XElement),
	attributeName As String
) As IEnumerable(Of Tuple(Of XElement, String))

public:
[ExtensionAttribute]
static IEnumerable<Tuple<XElement^, String^>^>^ WhereAttribute(
	IEnumerable<XElement^>^ source, 
	String^ attributeName
)

[<ExtensionAttribute>]
static member WhereAttribute : 
        source : IEnumerable<XElement> * 
        attributeName : string -> IEnumerable<Tuple<XElement, string>>

GSF.Xml.XmlExtensions.WhereAttribute = function(source, attributeName);

View Source

Parameters

source IEnumerableXElement: Set of XElement values to search.
attributeName String: Attribute name to match.

Return Value

IEnumerableTupleXElement, String
Matching sets of XElement items and associated attribute values.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableXElement. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Remarks

When used in conjunction with the Is(IEnumerableTupleXElement, String, String, Boolean) extension, allows for expressions like:

Copy

var globals = XDocument.Load(configFile)
    .Descendants("SettingsGroup")
    .WhereAttribute("Type").Is("Globals");

Reference

XmlExtensions Class

GSF.Xml Namespace