Class WatchSubMemberAttribute

When put on a property, will create subscriptions watching a given sub-property to change, and trigger the corresponding method or event.

Inheritance
System.Object
WatchBaseAttribute
WatchSubMemberAttribute
Inherited Members
Namespace: Eco.Core.PropertyHandling
Assembly: Eco.Core.dll
Syntax
public class WatchSubMemberAttribute : WatchBaseAttribute
Remarks

Declaring class must implement INotifyPropertyChanged, so that it can watch when the prop changes. Declaring class must also implement ISubscriptions, allowing this service to property track subscriptions when they are made and remove them upon destroy.

Constructors

WatchSubMemberAttribute(Boolean, String)

Declaration
public WatchSubMemberAttribute(bool watchAllSubProps, string callback)
Parameters
Type Name Description
System.Boolean watchAllSubProps
System.String callback

WatchSubMemberAttribute(String, String, SubPropWatcherFlag)

Whenever the given sub property is changed/triggered, call the given callback.

Declaration
public WatchSubMemberAttribute(string subPropName, string callback, SubPropWatcherFlag flags)
Parameters
Type Name Description
System.String subPropName
System.String callback
SubPropWatcherFlag flags

WatchSubMemberAttribute(String, String, Type, SubPropWatcherFlag)

Declaration
public WatchSubMemberAttribute(string subPropName, string callback, Type memberTypeMustDerive, SubPropWatcherFlag flags)
Parameters
Type Name Description
System.String subPropName
System.String callback
System.Type memberTypeMustDerive
SubPropWatcherFlag flags

WatchSubMemberAttribute(Type, String, String, SubPropWatcherFlag)

Declaration
public WatchSubMemberAttribute(Type rootType, string subPropName, string callback, SubPropWatcherFlag flags)
Parameters
Type Name Description
System.Type rootType
System.String subPropName
System.String callback
SubPropWatcherFlag flags

Fields

Callback

The name of the method on 'this' that we want to call. Can be either an event or a method.

Declaration
public readonly string Callback
Field Value
Type Description
System.String

Flags

Flags customizing behavior of this attribute.

Declaration
public readonly SubPropWatcherFlag Flags
Field Value
Type Description
SubPropWatcherFlag

Properties

DontTriggerWhenRootPropSetToNull

When true callback won't be called when root property is set to null.

Declaration
public bool DontTriggerWhenRootPropSetToNull { get; }
Property Value
Type Description
System.Boolean
Remarks

This flag can only be used when callback expects to receive new value of sub property as parameter and sub proeprty is of value type (so null can't be passed) and is mandatory in such cases to explicitly show that different behavior for value types will be used.

Methods

GetCallback(MemberInfo, out Type)

Returns callback delegate based on the value of Callback field.

Declaration
public override PropertyChangedBeforeAfterEventHandler GetCallback(MemberInfo memberWithAttribute, out Type expectedCallbackParam)
Parameters
Type Name Description
System.Reflection.MemberInfo memberWithAttribute

Member to which this attribute is applied.
System.Type expectedCallbackParam

Type of expected callback parameter if any.
Returns
Type Description
PropertyChangedBeforeAfterEventHandler
Overrides

Extension Methods