CollectionSourceModeAttribute.Mode Property
Specifies the mode of operation for the Collection Source created by the List Property Editor that represents the CollectionSourceModeAttribute‘s target property in a UI.
Namespace: DevExpress.ExpressApp
Assembly: DevExpress.ExpressApp.v19.1.dll
Declaration
Property Value
| Type | Description |
|---|---|
| CollectionSourceMode | A CollectionSourceMode enumeration value specifying the Collection Source’s mode of operation. |
Available values:
| Name | Description |
|---|---|
| Normal | A collection of objects of the specified type is created by the CollectionSourceBase.ObjectSpace. For instance, the XPObjectSpace creates an XPCollection. When filtering is applied, the corresponding criteria is directly applied to the underlying collection. So, in this mode, if you iterate over the collection represented by a List View, you will only see the filtered objects. |
| Proxy | Two collections are created for a Collection Source. The first one is an original collection created by the Object Space. The second one is a intermediate proxy collection. The proxy collection represents the original collection’s wrapper, because it implements several interfaces that are required in different built-in features. When filtering is applied to the collection that a Collection Source represents, the criteria are not directly applied to the original collection, instead they are applied to the proxy collection. So, in this mode, if you iterate over the collection represented by the CollectionSourceBase.Collection property, you will see only filtered objects. But you can iterate over the original collection to access all objects belonging to the collection. |
Remarks
The value that you pass as the mode parameter is set to the CollectionSourceBase.Mode property of the Collection Source of the List View that represents the target collection property.