DelayedAttribute Class
Indicates that the property’s value should not be loaded when a persistent object is being loaded. The property will be loaded the first time it is accessed.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v24.2.dll
NuGet Package: DevExpress.Xpo
#Declaration
#Remarks
Use this attribute to improve performance when loading and updating properties that are rarely used, or contain large amounts of data. For more information, see Delayed Loading.
#Example
The following example demonstrates how to delay the loading of the DelayedAttachment property and improve property value update performance, by enabling the DelayedAttribute.UpdateModifiedOnly property.
Note
This solution uses the XPDelayed
using DevExpress.Xpo;
public class Customer : XPObject {
// ...
private XPDelayedProperty document = new XPDelayedProperty();
// Improve update performance for the property's value
// by passing true as the attribute's
// updateModifiedOnly parameter.
[Delayed(nameof(document), true)]
public Byte[] DelayedAttachment {
get { return (Byte[])document.Value; }
set { document.Value = value; }
}
}