Gets the value from the XML node's child elements, returning defaultValue if the value doesn't exist.

Namespace: DotNetNuke.Collections
Assembly: DotNetNuke (in DotNetNuke.dll)

Syntax

C#
public static T GetValueOrDefault<T>(
	this IXPathNavigable node,
	string key,
	T defaultValue,
	Func<Object, T> converter
)
Visual Basic
<ExtensionAttribute> 
Public Shared Function GetValueOrDefault(Of T) ( 
	node As IXPathNavigable,
	key As String,
	defaultValue As T,
	converter As Func(Of Object, T)
) As T

Parameters

node
Type: System.Xml.XPath..::..IXPathNavigable
An XML node which containers other elements.
key
Type: System..::..String
The name of the element from which to get the value.
defaultValue
Type: T
The default value to return if the node doesn't have a value for the given key.
converter
Type: System..::..Func<(Of <(<'Object, T>)>)>
A function to convert the value as an Object to a T instance.

Type Parameters

T
The type of the value to retrieve

Return Value

A T instance.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IXPathNavigable. When you use instance method syntax to call this method, omit the first parameter. For more information, see [b8020aae-374d-46a9-bcb7-8cc2390b93b6] or [175ce3ff-9bbf-4e64-8421-faeb81a0bb51].

Exceptions

ExceptionCondition
System..::..ArgumentNullExceptionnode is null

See Also