Reflection – Printing Property Value Of Object

Anggaplah kita mempunya sebuah class Person seperti ini.

public class Person
{
public Person()
{
Childs = new List();
}
public string Name { get; set; }
public int Age { get; set; }
public Address PostalAddress { get; set; }
public Person Parent { get; set; }
public List Childs { get; set; }

}

public class Address
{
public string Street { get; set; }

}

Kita ingin mencetak seluruh property yang tidak null dari object Person di atas termasuk object dan collection yang ada di dalamnya menggunakan reflection.

private static void PrintProperties(object obj, int indent)
{
if (obj == null) return;
string indentString = new string(' ', indent);
Type objType = obj.GetType();
PropertyInfo[] properties = objType.GetProperties();
foreach (PropertyInfo property in properties)
{
object propValue = property.GetValue(obj, null);
var elems = propValue as IList;
if (elems != null)
{
if (elems.Count > 0)
{
Console.WriteLine("{0}{1}:", indentString, property.Name);
foreach (var item in elems)
{
PrintProperties(item, indent + 3);
}
}
}else
{
if (property.PropertyType.Assembly == objType.Assembly)
{
if (propValue != null)
{
Console.WriteLine("{0}{1}:", indentString, property.Name);
PrintProperties(propValue, indent + 2);
}
}else
{
Console.WriteLine("{0}{1}: {2}", indentString, property.Name, propValue);
}
}
}
}

var child1 = new Person() { Name = "Abe", Age = 1 };
var child2 = new Person() { Name = "Lisa", Age = 5 };
var parent = new Person()
{
Name = "Me",
Age = 40,
PostalAddress = new Address
{
Street = "Bandung Soekarno Hatta"
}
};
parent.Childs.Add(child1);
parent.Childs.Add(child2);
PrintProperties(parent, 1);

Ketika dijalankan, hasilnya seperti ini: