I have:
class A
{
public object obj1 {get;set;}
public object obj2 {get;set;}
public object obj3 {get;set;}
}
Somewhere i have instance of obj2 for example. How can i get its name ("obj2") without using class A or instance A?
You can't do this. obj2 is the name of a property of the class A. So without using class A you cannot know its property names.
The only way is tracking the build process of class A, example:
public class Container
{
Dictionary<string, object> _objectContainer;
public Container()
{
_objectContainer = new Dictionary<string, object>();
}
public void SetByName( string name, object obj )
{
if( !_objectContainer.ContainsKey( name ) )
{
_objectContainer.Add( name, obj );
}
else
{
_objectContainer[name] = obj;
}
}
public object GetByName( string name )
{
return _objectContainer[name];
}
}
public class ABuilder
{
public static A Build( Container container )
{
var a = new A();
var obj1 = new object();
var obj2 = new object();
var obj3 = new object();
container.SetByName( "obj1", obj1 );
container.SetByName( "obj2", obj2 );
container.SetByName( "obj3", obj3 );
a.Obj1 = obj1;
a.Obj2 = obj2;
a.Obj3 = obj3;
return a;
}
}
class Program
{
static void Main( string[] args )
{
var container = new Container();
var obj = ABuilder.Build( container );
var obj1 = container.GetByName( "obj1" );
}
}
To do this without the instance of class A, you have to modify the type of your properties :
class A
{
private B obj1, obj2;
public B Obj1
{
get { return obj1; }
set
{
if (value != null && value.Owner != null)
throw new ArgumentException();
if (obj1 != null)
obj1.Owner = null;
obj1 = value;
obj1.Owner = "Obj1";
}
}
public B Obj2
{
get { return obj2; }
set
{
if (value != null && value.Owner != null)
throw new ArgumentException();
if (obj2 != null)
obj2.Owner = null;
obj2 = value;
obj2.Owner = "Obj2";
}
}
}
class B
{
public string Owner { get; internal set; }
// ...
}
