Changing attribute value of an object in an ObservableCollection overwrites attribute vale of other objects in the same collection

Question

Am having a class as following,

class Person
{
   private string _PersonName;

   [Category("General")]
   [ReadOnly(true)]
   [Browsable(true)]
   public string Name
   {
       get { return _PersonName; }
       set { _PersonName= value; }
   }
}

and an ObservableCollection of Person objects as following,

ObservableCollection<Person> Persons =  new ObservableCollection<Person>();

Consider, I am having 5 Person objects in Persons(ObservableCollection).

Person Person1 = new Person(){Name = "User 1";}
Person Person2 = new Person(){Name = "User 2";}
Person Person3 = new Person(){Name = "User 3";}
Person Person4 = new Person(){Name = "User 4";}
Person Person5 = new Person(){Name = "User 5";}

Persons.Add(Person1);
Persons.Add(Person2);
Persons.Add(Person3);
Persons.Add(Person4);
Persons.Add(Person5);

Now, am changing Browsable attribute value of Second object from true to false dynamically as follows,

PropertyDescriptor pd = TypeDescriptor.GetProperties(Person1)["Name"];
BrowsableAttribute ba =(BrowsableAttribute)pd.Attributes[typeof(BrowsableAttribute)]; 
FieldInfo IsBrowsable = ba.GetType().GetField("browsable", BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.NonPublic);
IsBrowsable.SetValue(ba, false);

after this change, value of Browsable(true) attribute of all other objects becomes false.

This is the problem, How to prevent this?

Thank you all.

`Persons.Add(new Person().Name = "User5");` doesn't look right at all. Instead try `Persons.Add(new Person() { Name = "User5" });` — Mike Eason, Aug 11 '15 at 09:35
What makes you think you are "changing Browsable attribute value of Second object"? There is no Person instance involved in your code. — Clemens, Aug 11 '15 at 09:35
AFAIK, attributes are applied at the aspect level (e.g. Class, Method, Property, etc) and not at the 'object' level. When you change the attribute value, it's applied for the Name property of Person class (which means for all instances/objects of Person). See ['How do attribute classes work'](http://stackoverflow.com/questions/2676603/how-do-attribute-classes-work)? — publicgk, Aug 11 '15 at 09:53
@publicgk Thank you very much for this clarification. Is there any way to achieve this scenario? — Karthikeyan Rajendran, Aug 11 '15 at 10:06
@publicgk I want each person object with different browsable attribute value for its Name property. — Karthikeyan Rajendran, Aug 11 '15 at 10:11

Changing attribute value of an object in an ObservableCollection overwrites attribute vale of other objects in the same collection

0 Answers0