M_CodeJam_Xml_XNodeExtensions_ElementValueOrDefault__1

XNodeExtensions.ElementValueOrDefault(T) Method (XElement, XName, Func(String, T), T)

Returns value of optional element.

Namespace: CodeJam.Xml
Assembly: CodeJam (in CodeJam.dll) Version: 2.1.0.0

Syntax

C#

public static T ElementValueOrDefault<T>(
	this XElement parent,
	XName name,
	Func<string, T> valueSelector,
	T defaultValue
)

VB

<ExtensionAttribute>
Public Shared Function ElementValueOrDefault(Of T) ( 
	parent As XElement,
	name As XName,
	valueSelector As Func(Of String, T),
	defaultValue As T
) As T

F#

[<ExtensionAttribute>]
static member ElementValueOrDefault : 
        parent : XElement * 
        name : XName * 
        valueSelector : Func<string, 'T> * 
        defaultValue : 'T -> 'T 

Parameters

 

parent

Type: System.Xml.Linq.XElement
Parent element.

name

Type: System.Xml.Linq.XName
Element name.

valueSelector

Type: System.Func(String, T)
Function to parse element value

defaultValue

Type: T
Default value.

Type Parameters

 

T

Return Value

Type: T
Selected element value or defaultValue if element does not exist

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type XElement. 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).

Exceptions

 

Exception	Condition
ArgumentNullException	parent or name or valueSelector is null.

See Also

Reference

XNodeExtensions Class
ElementValueOrDefault Overload
CodeJam.Xml Namespace