C# Objects with the same properties conversion

Question

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How to copy value from class X to class Y with the same property name in c#?

C# 4.0

If i have N numbers of POCO objects with the same properties (the same names and types) I want to convert them one to another. They dont have any parent relations, the just POCO.

I may type converted function to copy just properties values from one to another:

obj1.a = obj1.a; obj2.a = obj2.a; ...

but it is very boring to do this and especially in examples when i have many properties in objects. May by someone may suggest more clever way of doing this?

score 2 · Answer 1 · answered Aug 09 '10 at 08:43

You can use Reflection like Tcks desribes it, or you can use AutoMapper

http://automapper.codeplex.com/

With AutoMapper you have an easy to use Mapper. Which is based on Convention. Also you can do more complex things if you need them. See the examples.

score 1 · Answer 2 · answered Aug 09 '10 at 08:35

You can use the reflection:

object obj1 = GetObject(1);
object obj2 = GetObject(2);

Type type1 = obj1.GetType();
Type type2 = obj2.GetType();

var properties = (from p1 in type1.GetProperties( BindingFlags.Instance | BindingFlags.Public )
                  where p1.CanRead && p1.CanWrite
                  from p2 in type2.GetProperties( BindingFlags.Instance | BindingFlags.Public )
                  where p2.CanRead && p2.CanWrite
                  where p1.Name == p2.Name && p1.PropertyType = p2.PropertyType
                  select new { Property1 = p1, Property2 = p2 }).ToList();

foreach( var props in properties ) {
    object value1 = props.Property1.GetValue( obj1, null );
    props.Property2.SetValue( obj2, value1, null );
}

However, the reflection is much much slower, than the code. If you need good performance, you can look at Fasterflect project, which dynamicly generates IL code from reflection infos.

C# Objects with the same properties conversion

2 Answers2