ProcessDataLockingInfoController Class

Use this controller to implement custom strategies of conflict detection and resolution.

Namespace: DevExpress.ExpressApp.SystemModule

Assembly: DevExpress.ExpressApp.v25.1.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#
VB.NET

public class ProcessDataLockingInfoController :
    ObjectViewController

Public Class ProcessDataLockingInfoController
    Inherits ObjectViewController

Remarks

When you execute Save, Save and New, or Save and Close Actions, this controller calls the Object Space code that collects the following information:

Local modified objects
Objects modified by other users
Conflict detection and resolution strategies implemented in your application

You can access and modify this information in the DataLockingProcessing event.

The following code snippet enables automatic merge in XAF applications:

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.SystemModule;

namespace MainDemo.Module.Controllers;

public class AutoMergeViewController : ViewController {
    private ProcessDataLockingInfoController lockController;

    private void OnDataLocking(object sender, DataLockingProcessingEventArgs e) {
        foreach (var info in e.DataLockingInfo.ObjectLockingInfo) {
            info.CanAutoMerge = info.CanMerge;
        }
    }

    protected override void OnActivated() {
        base.OnActivated();
        lockController = Frame.GetController<ProcessDataLockingInfoController>();
        lockController.DataLockingProcessing += OnDataLocking;
    }

    protected override void OnDeactivated() {
        base.OnDeactivated();
        if (lockController != null) {
            lockController.DataLockingProcessing -= OnDataLocking;
            lockController = null;
        }
    }
}