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.NET Framework 4.5.2+

IObjectSpace.Reloaded Event

Occurs after the current Object Space reconnects to the database.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v21.2.dll

Declaration

event EventHandler Reloaded

Event Data

The Reloaded event's data class is EventArgs.

Remarks

In the BaseObjectSpace descendant, override the BaseObjectSpace.Reload method. Invoke the BaseObjectSpace.OnReloaded method in this override to raise the Reloaded event.

The Reloaded event handler updates Action states and all objects that are retrieved with the newly established connection.

The following code shows how to manually save child collection changes made in the parent Detail View:

using DevExpress.ExpressApp;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using YourSolutionName.Module.BusinessObjects;

namespace YourSolutionName.Module.Controllers {
    public class MyViewController : ObjectViewController<DetailView, Parent> {
        List<Child> detailObjectsCache = new List<Child>();
        protected override void OnActivated() {
            base.OnActivated();
            ObjectSpace.CustomCommitChanges += ObjectSpace_CustomCommitChanges;
            ObjectSpace.Committing += ObjectSpace_Committing;
            ObjectSpace.Committed += ObjectSpace_Committed;
            ObjectSpace.Reloaded += ObjectSpace_Reloaded;
        }
        protected override void OnDeactivated() {
            ObjectSpace.CustomCommitChanges -= ObjectSpace_CustomCommitChanges;
            ObjectSpace.Committing -= ObjectSpace_Committing;
            ObjectSpace.Committed -= ObjectSpace_Committed;
            ObjectSpace.Reloaded -= ObjectSpace_Reloaded;
            base.OnDeactivated();
        }
        void ObjectSpace_Reloaded(object sender, EventArgs e) {
            detailObjectsCache.Clear();
        }
        void ObjectSpace_Committed(object sender, EventArgs e) {
            detailObjectsCache.Clear();
        }
        void ObjectSpace_Committing(object sender, CancelEventArgs e) {
            IObjectSpace os = (IObjectSpace)sender;
            for (int i = os.ModifiedObjects.Count - 1; i >= 0; i--) {
                object item = os.ModifiedObjects[i];
                if (typeof(Child).IsAssignableFrom(item.GetType())) {
                    detailObjectsCache.Add(item as Child);
                    os.RemoveFromModifiedObjects(item);
                }
            }
        }
        void ObjectSpace_CustomCommitChanges(object sender, HandledEventArgs e) {
            // Implement custom logic to save Detail objects here. 
            foreach (Child detailObject in detailObjectsCache) {
                //...  
            }
        }
    }
}

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

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.

See Also