How to keep the value of the source when using InjectFrom - asp.net-mvc-3

Question

By injecting values ​​into my domain object, I would keep the values ​​of some properties.
Example:
Domain model
public class Person
{
public string Name { get; set; }
public Guid ID { get; set; }
public DateTime CreateAt { get; set; }
public string Notes { get; set; }
public IList<string> Tags { get; set; }
}
View Model
public class PersonViewMode
{
public string Name { get; set; }
public Guid ID { get; set; }
public DateTime CreateAt { get; set; }
public string Notes { get; set; }
public IList<string> Tags { get; set; }
public PersonViewMode() { ID = Guid.NewGuid(); } //You should use this value when it is the Target
}
Sample
var p = new Person
{
ID = Guid.NewGuid() //Should be ignored!
,
Name = "Riderman"
,
CreateAt = DateTime.Now
,
Notes = "teste de nota"
,
Tags = new[] {"Tag1", "Tag2", "Tag3"}
};
var pvm = new PersonViewMode();
pvm.InjectFrom(p); //Should use the ID value generated in the class constructor PersonViewMode

Answer 1

if you delete the set; from from the ViewModel's ID then it won't be set;
otherwise you could save the value of ID in a separate variable and put it back after injecting,
or you can create a custom valueinjection that would ignore "ID" or would receive a list of properties to ignore as a parameter
here's the example for a custom injection that receives a list of property names to ignore:
public class MyInj : ConventionInjection
{
private readonly string[] ignores = new string[] { };
public MyInj(params string[] ignores)
{
this.ignores = ignores;
}
protected override bool Match(ConventionInfo c)
{
if (ignores.Contains(c.SourceProp.Name)) return false;
return c.SourceProp.Name == c.TargetProp.Name && c.SourceProp.Type == c.TargetProp.Type;
}
}
and use it like this:
pvm.InjectFrom(new MyInj("ID"), p);
if you need to ignore more, you can do like this:
pvm.InjectFrom(new MyInj("ID","Prop2","Prop3"), p);