NonPersistentObjectSpace.CustomGetObjectsQuery Event

Occurs when the GetObjectsQuery<T>(Boolean) method is executed.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v24.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public event EventHandler<CustomGetObjectsQueryEventArgs> CustomGetObjectsQuery

VB.NET

Public Event CustomGetObjectsQuery As EventHandler(Of CustomGetObjectsQueryEventArgs)

Event Data

The CustomGetObjectsQuery event's data class is DevExpress.ExpressApp.CustomGetObjectsQueryEventArgs.

Remarks

Handle this event to pass a custom strongly-typed query of non-persistent objects to the GetObjectsQuery<T>(Boolean) method. The following example shows how to handle this event in the Application Builder code:

File: MySolution.Blazor.Server/Startup.cs, MySolution.Win/Startup.cs, MySolution.WebApi/Startup.cs

C#

using DevExpress.ExpressApp;
// ...
builder.ObjectSpaceProviders.Events.OnObjectSpaceCreated = context => {
    NonPersistentObjectSpace nonPersistentObjectSpace = context.ObjectSpace as NonPersistentObjectSpace;
    if (nonPersistentObjectSpace != null) {
        nonPersistentObjectSpace.CustomGetObjectsQuery += NonPersistentObjectSpace_CustomGetObjectsQuery;
        //...
    }
};
// ...
List<Article> articles;
private void NonPersistentObjectSpace_CustomGetObjectsQuery(object sender, CustomGetObjectsQueryEventArgs e) {
    if (typeof(Article).IsAssignableFrom(e.ObjectType)) {
        e.Queryable = articles.AsQueryable();
    }
}