How to: Disable Property Editors Based on a Business Rule

Question Comments

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Added By: naresh vadala at: 5/13/2015 4:20:05 AM    

Team,

Can we achieve this without Appearance attribute, if yes please provide sample.

Thank you.
Regards,
Naresh Vadala.

Added By: Konstantin B (DevExpress) at: 5/13/2015 5:47:47 AM    Hi Naresh,

Yes, you can specify Appearance Rules in the Model Editor as it is demonstrated in the Declare Conditional Appearance Rules in the Application Model topic. If you want to avoid the use of the Conditional Appearance module at all, try the following Controller:

[C#]
usingDevExpress.ExpressApp;usingDevExpress.ExpressApp.Editors;// ...publicclassCustomizeContactAppearanceController:ObjectViewController<DetailView,Contact>{protectedoverridevoidOnActivated(){base.OnActivated();UpdateAppearance();ObjectSpace.ObjectChanged+=ObjectSpace_ObjectChanged;ObjectSpace.Committed+=ObjectSpace_Committed;View.SelectionChanged+=View_SelectionChanged;}protectedoverridevoidOnDeactivated(){ObjectSpace.ObjectChanged-=ObjectSpace_ObjectChanged;ObjectSpace.Committed-=ObjectSpace_Committed;View.SelectionChanged-=View_SelectionChanged;base.OnDeactivated();}voidObjectSpace_ObjectChanged(objectsender,ObjectChangedEventArgse){UpdateAppearance();}voidObjectSpace_Committed(objectsender,EventArgse){UpdateAppearance();}voidView_SelectionChanged(objectsender,EventArgse){UpdateAppearance();}privatevoidUpdateAppearance(){foreach(ViewItemiteminView.Items){if(item.Id=="SpouseName")UpdateSpouseNameVisibility(itemasIAppearanceVisibility);if(item.Id=="Address2")UpdateAddress2Visibility(itemasIAppearanceEnabled);}}privatevoidUpdateSpouseNameVisibility(IAppearanceVisibilityitem){if(!ViewCurrentObject.IsMarried)item.Visibility=ViewItemVisibility.Hide;elseitem.Visibility=ViewItemVisibility.Show;}privatevoidUpdateAddress2Visibility(IAppearanceEnableditem){item.Enabled=!string.IsNullOrEmpty(ViewCurrentObject.Address1);}}