Class BaseDefaultSingleViewExtenderController<DISPLAYTYPE, EXTENDEDTYPE>

The core controller for providing a IBaseDefaultSingleView<T> against an entity that extends (IsTypeExtender) another type

If the DISPLAYTYPE does not exist this will temporarily create one and only add it to pending changes when the user actually modifies the temporary item itself

Inheritance
System.Object
ModelViewController
BaseDefaultSingleViewController<DISPLAYTYPE>
BaseDefaultSingleViewExtenderController<DISPLAYTYPE, EXTENDEDTYPE>
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: LemonEdge.Client.Core.Views.Core
Assembly: ClientCore.dll
Syntax
public abstract class BaseDefaultSingleViewExtenderController<DISPLAYTYPE, EXTENDEDTYPE> : BaseDefaultSingleViewController<DISPLAYTYPE>, IModelViewController where DISPLAYTYPE : IBaseEntity where EXTENDEDTYPE : IBaseEntity
Type Parameters
Name Description
DISPLAYTYPE

The type that extends the EXTENDEDTYPE and will be displayed/edited in the IBaseDefaultSingleView<T>

This type must have a relationship to the EXTENDEDTYPE marked with IsTypeExtender

EXTENDEDTYPE

The type that DISPLAYTYPE is extending and will be passed in to this view to display, before the view loads the DISPLAYTYPE and displays that instead

Constructors

BaseDefaultSingleViewExtenderController(IBaseDefaultSingleView<DISPLAYTYPE>)

Creates a new default single view extender controller with the specified instance of a default single view

Declaration
public BaseDefaultSingleViewExtenderController(IBaseDefaultSingleView<DISPLAYTYPE> view)
Parameters
Type Name Description
IBaseDefaultSingleView<DISPLAYTYPE> view

The instance of the default single view in the client application

Properties

ExtendRelationshipExtendedTypeColumn

The property on the EXTENDEDTYPE type that is the target of the IsTypeExtender relationship from the DISPLAYTYPE type

Declaration
protected virtual string ExtendRelationshipExtendedTypeColumn { get; }
Property Value
Type Description
System.String

ExtendRelationshipSourceDisplayTypeColumn

The property on the DISPLAYTYPE type that has a IsTypeExtender relationship linking to the EXTENDEDTYPE type

Declaration
protected abstract string ExtendRelationshipSourceDisplayTypeColumn { get; }
Property Value
Type Description
System.String

TrackItemChanges

We always track items as we have to see if a temporary DISPLAYTYPE entity created has been changed an needs to be inserted into the context for changes

Declaration
public override bool TrackItemChanges { get; }
Property Value
Type Description
System.Boolean
Overrides
LemonEdge.Client.Core.Views.Core.BaseDefaultSingleViewController<DISPLAYTYPE>.TrackItemChanges

Methods

Clear()

Removes any cached internal items

Declaration
public override Task Clear()
Returns
Type Description
System.Threading.Tasks.Task

A task indicating the completion of the operation
Overrides

LoadSingleItem()

Loads the DISPLAYTYPE to be displayed against this EXTENDEDTYPE instance from the IsTypeExtender relationship between the two

If the item does not exist then a dummy one is created and cached, it is added to changes for this context only when the user actually makes a change to the dummy extending item instance (probably from this IBaseDefaultSingleView<T> view)

Declaration
public override Task<DISPLAYTYPE> LoadSingleItem()
Returns
Type Description
System.Threading.Tasks.Task<DISPLAYTYPE>

The extending item to be displayed in this IBaseDefaultSingleView<T> view
Overrides
LemonEdge.Client.Core.Views.Core.BaseDefaultSingleViewController<DISPLAYTYPE>.LoadSingleItem()

OnTrackedItemChanged(Object, String)

If the DISPLAYTYPE has changed and we just temporarily created it as a new item as it did not exist yet, then we need to add it to the context as a pending change

If the temporary DISPLAYTYPE is never changed then we do not want to save it as the user has not made any changes that warrant the extending type to exist if it did not before

Declaration
protected override void OnTrackedItemChanged(object item, string propName)
Parameters
Type Name Description
System.Object item

The item that changed
System.String propName

The property that changed
Overrides
LemonEdge.Client.Core.Views.Core.BaseDefaultSingleViewController<DISPLAYTYPE>.OnTrackedItemChanged(System.Object, System.String)

Implements

Extension Methods