IObjectSpace.CreateCollection(Type, CriteriaOperator) Method

Creates and initializes a collection of objects of the specified type, filtered according to the specified criteria.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v18.2.dll

Declaration

C#

IList CreateCollection(
    Type objectType,
    CriteriaOperator criteria
)

VB.NET

Function CreateCollection(
    objectType As Type,
    criteria As CriteriaOperator
) As IList

Parameters

Name	Type	Description
objectType	Type	The type of persistent objects to include in the collection.
criteria	CriteriaOperator	The CriteriaOperator that specifies a criteria for object selection in a data store.

Returns

Type	Description
IList	A IList collection that includes the persistent objects of the specified type. In addition, only objects that satisfy the specified criteria will be retrieved to this collection.

Remarks

Use this method to create a collection of objects of the specified type, filtered according to the specified criteria. The newly created collection will use the current Object Space to load and save persistent objects.

If you implement the IObjectSpace interface in the BaseObjectSpace class’ descendant, you should override a virtual protected BaseObjectSpace.CreateCollection method which is called by the BaseObjectSpace.CreateCollection method.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the CreateCollection(Type, CriteriaOperator) method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

XAF_how-to-show-an-xtrareport-created-at-design-time-without-the-use-of-xaf-reports-module-e4752/CS/NativeXtraReportExample.Module.Win/Controllers/ShowXtraReportController.cs#L46

}
var dataSource = Application.CreateObjectSpace().CreateCollection(typeof(Task), criteria);
var report = new TaskReport();

VB.NET

XAF_how-to-show-an-xtrareport-created-at-design-time-without-the-use-of-xaf-reports-module-e4752/VB/NativeXtraReportExample.Module.Win/Controllers/ShowXtraReportController.vb#L47

End If
Dim dataSource = Application.CreateObjectSpace().CreateCollection(GetType(Task), criteria)
Dim report = New TaskReport()