How to: Disable a Confirmation Dialog in an ASP.NET Core Blazor Application

• Dec 22, 2023

In XAF ASP.NET Core Blazor applications, a confirmation dialog appears if you attempt to exit a view without saving your changes. The following Controllers implement this functionality:

• ConfirmationDetailViewController in Detail Views.
• ConfirmationListViewController in List Views.

This topic demonstrates how to disable the confirmation dialog in a Detail View.

Step-by-Step Instructions

1. In the YourSolutionName.Blazor.Server\Controllers folder, create a new Controller and name it BlazorSuppressConfirmationsController.

2. Replace the auto-generated code with the following code snippet:

   using DevExpress.ExpressApp;
   using DevExpress.ExpressApp.Blazor.SystemModule;
   
   namespace MainDemo.Module.Blazor.Controllers {
       public class BlazorSuppressConfirmationsController : ViewController {
           protected override void OnActivated() {
               base.OnActivated();
                   var confirmationDetailViewController = Frame.GetController<ConfirmationDetailViewController>();
                   if (confirmationDetailViewController != null) {
                       confirmationDetailViewController.Active["DeactivateInCode"] = false;
               }
           }
       }
   }
   

3. Build the project and run the application. Open a Detail View and change a property value. When you close the view, XAF does not save the changes and the confirmation dialog does not appear.

Tip

The ConfirmationDetailViewController and ConfirmationListViewController are active for non-persistent objects only if the AutoSetModifiedOnObjectChange property is set to true.