Session.PreFetch<T>(IEnumerable<T>, String[]) Method
Enforces loading data for associated collections and delayed properties.
Namespace: DevExpress.Xpo
Assembly: DevExpress.Xpo.v18.2.dll
Declaration
public void PreFetch<T>(
IEnumerable<T> objects,
params string[] propertyPaths
)
where T : class
Parameters
Name | Type | Description |
---|---|---|
objects | IEnumerable<T> | 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”). |
Type Parameters
Name |
---|
T |
Remarks
By default, data is loaded automatically when you access a nested collection or delayed property for the first time. When the PreFetch<T> 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<Person>(people, "PhoneNumbers");
See Also