CollectionSourceBase.DataAccessMode Property

Gets the mode used to access the CollectionSourceBase‘s collection.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v23.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public CollectionSourceDataAccessMode DataAccessMode { get; }

VB.NET

Public ReadOnly Property DataAccessMode As CollectionSourceDataAccessMode

Property Value

Type	Description
CollectionSourceDataAccessMode	A CollectionSourceDataAccessMode enumeration value that specifies the mode used to access the Collection Source’s CollectionSourceBase.Collection.

Available values:

Name	Description
Client	The entire record set required for the current List View is loaded into memory. All the data processing takes place on the client side.
Server	Data is requested from a data store in small portions that should currently be displayed. All data-aware operations are performed on the data server side.
DataView	A lightweight read-only list of data records (DevExpress.ExpressApp.EFCore.EFCoreDataView or XPView) is retrieved without loading complete persistent objects.
InstantFeedback	A List View’s control continues responding to a user’s actions while the data is being retrieved in a background thread (see Instant Feedback Mode).
InstantFeedbackView	A lightweight read-only list of data records (ObjectRecord) is retrieved without loading complete persistent objects. A List View’s control continues responding to a user’s actions while the data is being retrieved in a background thread.
ServerView	A lightweight read-only list of data records (ObjectRecord) is retrieved without loading complete persistent objects. Data is requested from a data store in small portions that should currently be displayed.
Queryable	The collection source constructs a query that the List Editor can modify to load only objects visible in the control. Only DevExpress.ExpressApp.Blazor.Editors.Grid.GridListEditor [deprecated] supports this mode.

Remarks

When you create a Collection Source in code, you can initialize the DataAccessMode property using a constructor with the dataAccessMode parameter. To set this property to the required value in the Model Editor, use the IModelListView.DataAccessMode property of the Views | <ListView> node corresponding to the List View for which the current Collection Source is created.

Refer to the following topics for detailed descriptions of the available data access modes:

• Client Mode
• Queryable Mode
• DataView Mode
• Server, ServerView, InstantFeedback, and InstantFeedbackView Modes