Calculated properties at runtime—TIMES 4

In this post you are going to see how you can use on more of eXpand powerfull features. 4 different ways for creating calculated runtime properties are avaliable.

1. XPO way –>Using Code
   Take a note at the CreateCalculabeMember extension method at the code bellow

       public class CreateRuntimeCalculatedFieldController : ViewController {

           public override void CustomizeTypesInfo(DevExpress.ExpressApp.DC.ITypesInfo typesInfo) {

               base.CustomizeTypesInfo(typesInfo);

               var classInfo = XafTypesInfo.XpoTypeInfoSource.XPDictionary.GetClassInfo(typeof(Customer));

    

               if (classInfo.FindMember("SumOfOrderTotals")==null) {

                   var attributes = new Attribute[] {new PersistentAliasAttribute("Orders.Sum(Total)")};

                   classInfo.CreateCalculabeMember("SumOfOrderTotals", typeof(float), attributes);

                   typesInfo.RefreshInfo(typeof(Customer));

               }

           }

       }

2. Using ModelDifference Module
   Setting IsRuntimeMember attribute will create a runtime member and setting the AliasExpression will convert it to a calculated member
   
   Take a note here that you can easily create calculabe members for the whole application or for a user role or for just one user, depending which type of model is going to host your property
3. Using WorldCreator extended members
   This approach can be used when u want to decorate your property with more attributes , since WorldCreator  supports much more than the model
    
   
4. Using a WordCreator Dynamic Assembly
   this approach is the most powerfull one cause allows you also to change the code template as you see in the image bellow