View.ErrorMessages Property

Allows access to the current View‘s message collection.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v25.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public ErrorMessages ErrorMessages { get; }

VB.NET

Public ReadOnly Property ErrorMessages As ErrorMessages

Property Value

Type	Description
DevExpress.ExpressApp.Utils.ErrorMessages	An ErrorMessages object which is used to access the messages.

Remarks

Each message contains an image and text associated with a specific property name. For example, the following code snippet adds a tooltip to the Email property in an XAF ASP.NET Core Blazor application:

C#

using DevExpress.ExpressApp;
using MySolution.Module.BusinessObjects;
namespace MySolution.Blazor.Server;
public class ErrorMessageController : ObjectViewController<DetailView, Employee> {
    protected override void OnActivated() {
        base.OnActivated();
        View.ErrorMessages.AddMessage(nameof(Employee.Email),
        View.CurrentObject,
        "Example: [e-mail]");
    }
}

The following image demonstrates the result in an ASP.NET Core Blazor application:

The Validation Module‘s ResultsHighlightController uses the ErrorMessages property. For more information, refer to the following topic: Built-in Controllers and Actions in Extra Modules.