XPBaseCollection.IsLoaded Property

Gets whether the XPBaseCollection collection is loaded with objects from the data store.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v19.2.dll

Declaration

C#

[Browsable(false)]
public bool IsLoaded { get; }

VB.NET

<Browsable(False)>
Public ReadOnly Property IsLoaded As Boolean

Property Value

Type	Description
Boolean	true if the collection is loaded with objects from the data store; otherwise, false.

Remarks

A collection loads data from a data store automatically if the XPBaseCollection.LoadingEnabled property is set to true and the collection’s contents is accessed for the first time. The IsLoaded property returns true if the collection has been loaded with data. Otherwise, the property returns false.

If the XPBaseCollection.LoadingEnabled property is set to false, the IsLoaded property is of no avail.

Note that when an XPCollection is created using a constructor with the criteriaEvaluationBehavior parameter, it is loaded immediately.

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the IsLoaded property.

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#

XPO_how-to-implement-a-calculated-property-aggregating-collection-items-e1477/CS/DetailCollectionChanged/DataObjects.cs#L35

get {
    if(!Children.IsLoaded)
        return (decimal?)Session.Evaluate<Child>(CriteriaOperator.Parse("Sum(Amount)"), new OperandProperty("Parent") == new OperandValue(this));

VB.NET

XPO_how-to-implement-a-calculated-property-aggregating-collection-items-e1477/VB/DetailCollectionChanged/DataObjects.vb#L40

Get
    If (Not Children.IsLoaded) Then
        Return CType(Session.Evaluate(Of Child)(CriteriaOperator.Parse("Sum(Amount)"), New OperandProperty("Parent") = New OperandValue(Me)), Nullable(Of Decimal))