EntityObjectExtensionsIfNullThenT Method (T, FuncT)

Provides alternative to the ?? null-coalescing for domain objects. If the checked object is null or ghost, returns the result of defaultValueFunc.

Namespace: Aloe.SystemFrameworks.Domain
Assembly: Aloe.SystemFrameworks.Domain (in Aloe.SystemFrameworks.Domain.dll) Version: 20.1.3.5

Syntax

public static T IfNullThen<T>(
	this T checkedObject,
	Func<T> defaultValueFunc
)
where T : EntityObject

<ExtensionAttribute>
Public Shared Function IfNullThen(Of T As EntityObject) ( 
	checkedObject As T,
	defaultValueFunc As Func(Of T)
) As T

public:
[ExtensionAttribute]
generic<typename T>
where T : EntityObject
static T IfNullThen(
	T checkedObject, 
	Func<T>^ defaultValueFunc
)

[<ExtensionAttribute>]
static member IfNullThen : 
        checkedObject : 'T * 
        defaultValueFunc : Func<'T> -> 'T  when 'T : EntityObject

Type: T
The checked object or if it is null or ghost - the defaultValueFunc result.

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

This overload is used for lazy load. The function is executed only if the checkedObject is null or ghost.