Session.PreFetch(XPClassInfo, IEnumerable, String[]) Method
Enforces loading data for associated collections and delayed properties.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v18.2.dll
Declaration
public void PreFetch(
XPClassInfo classInfo,
IEnumerable objects,
params string[] propertyPaths
)
Parameters
Name | Type | Description |
---|---|---|
classInfo | XPClassInfo | An XPClassInfo object that provides metadata information for a parent class. |
objects | IEnumerable | An IEnumerable list of parent objects. |
propertyPaths | String[] | An array of strings that are the collection property and delayed property names, or property paths (e.g, “ChildCollection.AnotherChildCollection”). |
Remarks
By default, data is loaded automatically when you access a nested collection or delayed property for the first time. When the PreFetch method is called, all data for the specified collections and delayed properties is loaded at once. No additional SQL queries for this data will be will be performed later.
XPCollection<Person> people = new XPCollection<Person>(session);
session.PreFetch(session.GetClassInfo<Person>(), people, "PhoneNumbers");
See Also