Gets the value from the collection, returning defaultValue if the value doesn't exist.

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

Syntax

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

Parameters

collection
Type: System.Collections.Specialized..::..NameValueCollection
The collection.
key
Type: System..::..String
The key by which to get the value.
defaultValue
Type: T
The default value to return if the collection 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 NameValueCollection. 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..::..ArgumentNullExceptioncollection is null
System..::..InvalidOperationExceptioncollection has multiple values for the given key

See Also