DevForce Community Forum : Property interceptor does not update the UI

Property interceptor does not update the UI : ichill, If you look at the...

Tue, 12 Mar 2013 06:42:32 -700

Author: mgood
Subject: 4024
Posted: 12-Mar-2013 at 6:42am

ichill,

If you look at the implementation of StaffingResourceNameEditorViewModel, which is the ViewModel that lets you edit the name, you'll notice that it doesn't set the properties on the entity directly and that the corresponding view is not bound to the entity's properties.

The entity's properties are set once you Ok out of the popup in StaffingResourceSummaryViewModel (see below). At that point the property interceptor is invoked and the strings are trimmed. If StaffingResourceNameEditorViewModel would set the properties directly, we would have to roll back the entity if the user clicks Cancel and risk losing other pending changes or we would have to reset just the properties with the original values. By not changing the actual properties until the user hits Ok, we don't have to do anything if they click Cancel and the entity remains untouched.

    [Export, PartCreationPolicy(CreationPolicy.NonShared)]
    public class StaffingResourceSummaryViewModel : StaffingResourceScreenBase
    {
        private readonly ExportFactory<StaffingResourceNameEditorViewModel> _nameEditorFactory;

        [ImportingConstructor]
        public StaffingResourceSummaryViewModel(IUnitOfWorkManager<IResourceMgtUnitOfWork> unitOfWorkManager,
                                                ExportFactory<StaffingResourceNameEditorViewModel> nameEditorFactory)
            : base(unitOfWorkManager)
        {
            _nameEditorFactory = nameEditorFactory;
        }

        public async void EditName()
        {
            var nameEditor = _nameEditorFactory.CreateExport().Value;
            await nameEditor.Start(StaffingResource.Id).ShowDialogAsync();

            StaffingResource.FirstName = nameEditor.FirstName;
            StaffingResource.MiddleName = nameEditor.MiddleName;
            StaffingResource.LastName = nameEditor.LastName;
        }
    }

Property interceptor does not update the UI : Hi sbelini,I tried it onapps.ideablade.com/TempHire....

Mon, 11 Mar 2013 18:58:04 -700

Author: ichill
Subject: 4024
Posted: 11-Mar-2013 at 6:58pm

Hi sbelini,

I tried it on apps.ideablade.com/TempHire . I change First name Steven to Steeve (with leading spaces), tabbed to the next field. I was expecting that the First name will show Steeve without the leading spaces, but it did not. It still shows the First name with leading spaces.

Property interceptor does not update the UI : ichill, I was not able to see...

Mon, 11 Mar 2013 11:02:23 -700

Author: sbelini
Subject: 4024
Posted: 11-Mar-2013 at 11:02am

ichill,

I was not able to see the behavior you described.
I've tried the property interceptor above in the WPF_TourOfDevForce sample and it works as expected.

Please provide a small solution reproducing the issue. (against NorthwindIB)

Property interceptor does not update the UI : I'm looking at temphire property...

Sat, 09 Mar 2013 21:58:28 -700

Author: ichill
Subject: 4024
Posted: 09-Mar-2013 at 9:58pm

I'm looking at temphire property interceptor

[BeforeSet]

internal void RemoveWhiteSpace(IEntityPropertySetInterceptorArgs args)

{

if (args.EntityProperty.DataType != typeof(string) || args.Value == null)

return;

args.Value = ((string) args.Value).Trim();

}

When I try to set the firstname to " Steeve" (double quote not included), the textbox still displays Steeve with the leading spaces.

How come it doesn't display the trimmed value?