Question

I have a class by 3 property.

class Issuance
{
    [MyAttr]
    virtual public long Code1 { get; set; }

    [MyAttr]
    virtual public long Code2 { get; set; }

    virtual public long Code3 { get; set; }
}

I need to select some of properties in this class by my custom attribute([MyAttr]).

I use of GetProperties() But this return all properties.

var myList = new Issuance().GetType().GetProperties();
//Count of result is 3 (Code1,Code2,Code3) But count of expected is 2(Code1,Code2) 

How can I do it?

Answer 1

Just use LINQ and a Where clause using MemberInfo.IsDefined:

var myList = typeof(Issuance).GetProperties()
                             .Where(p => p.IsDefined(typeof(MyAttr), false);