Question

I am using Enterprise Library.I want to map the column (of integer type) to Enum Type.

Say

Enum BloodGroup Type
{

  OPositive,
  ONegative,
  ABPositive,
  ABNegative,  
  BPositive,
  BNegative,
  NotSet 
} 

I am mapping Database Table’s column to C# Types’s (Class Employee) Properties.

IRowMapper<Employee> addressMapper = MapBuilder<Employee>
                .MapAllProperties()   // map all properties
                .Map(p=>p.BloodGroup)  // override BloodGroup property
                .WithFunc(rec => rec.IsDBNull(rec.GetOrdinal("BloodGroup"))
                ? BloodGroup.NotSet
                : BloodGroup.OPositive)
                .Build();

Code working fine but i want to map multiple condition of Enum in WithFun extension Method.I mean something like

.WithFun(rec=> rec.IsDBNull(rec.GetOrdinal("BloodGroup")) ?   BloodGroup.NotSet
               rec.GetOrdinal("BloodGroup")==1 ?BloodGroup.OPositive
               rec.GetOrdinal("BloodGroup")==2 ?BloodGroup.ONegative
         )

Help me to check multiple condition?

Answer 1

rec.IsDBNull(rec.GetOrdinal("BloodGroup")) ? BloodGroup.NotSet :
rec.GetOrdinal("BloodGroup")==1 ? BloodGroup.OPositive :
rec.GetOrdinal("BloodGroup")==2 ? BloodGroup.ONegative :
BloodGroup.NotSet

All you need to add are some colons and a final else expression. See ternary operator.