Mapper - Custom List-Property

From the previous example Mapper, a custom property was created on the data entity and then that property was used throughout the application.

It may be that there is only a need to create a custom property for a view and it is not desired to create the property on the data entity, but only the model entity.

Requirement: On the list of Employees, it should be displayed how many Employees an Employee has under them.

Task: Create a property on the EmployeesList class that counts ReportTo

Execution:

1. Create property 'CountReportTo' on EmployeesList
2. Make mapping
3. Add the property to the list control itself.

Create property

1. Select "User Interface".
2. Select "Employees".
3. Select the "List" tab.
4. Under "Code Tasks" select "Entity - Model" and click on "Add Code".
5. Create a property as below

    public partial class EmployeesList
    {
        public int CountReportTo { get; set; }

    }

Make mapping

In "Code Tasks" select "Mapper" and implement the following (FullName mapping is from a previous example):

    public partial class EmployeesListMapperProfile
    {
        partial void AfterConfiguration(IMappingExpression<Employees, EmployeesList> mapping)
        {
            mapping.ForMember(e => e.FullName, opt => opt.MapFrom(e => $"{e.FirstName} {e.LastName}"));
            mapping.ForMember(e => e.CountReportTo, opt => opt.MapFrom(e => e.Employees2.Count));
        }
    }

Add the property to the list

In "Code Tasks" select "List-Control" and implement the following:

    public partial class EmployeesList
    {
        partial void AfterSetLayout()
        {
            this.AddColumn<Northwind.Data.Entity.EmployeesList>(e => e.CountReportTo, e => e.CountReportTo);
        }
    }

The list now looks like this: