CODEWITHSUNDEEP
.netserialization
Sharjeel Ahmed
Sharjeel Ahmed

Reputation: 285

.NET MemberInfo.GetCustomAttributes isnt working for class's properties!

I have created a custom attribute & used it in properties (not fields) of my class.

When i call FormatterServices.GetSerializableMembers, it does give me all the properties

But when i try to read the attribute using MemberInfo.GetCustomAttributes, it doesnt give me any value.

When i try to achieve the same using object.GetType().GetProperties().GetCustomAttributes, It works perfectly.

Any idea why it is not giving the information in MemberInfo?

[AttributeUsage(AttributeTargets.Property)]
public class MyAttribute : Attribute { }

//DOES NOT WORK
MemberInfo[] members = FormatterServices.GetSerializableMembers(recordObject.GetType());
object[] attributes = members[0].GetCustomAttributes(typeof(MyAttribute), false)

//WORKS
PropertyInfo[] properties = recordObject.GetType().GetProperties();
object[] attributes = properties[0].GetCustomAttributes(typeof(MyAttribute), false);

Upvotes: 0

Views: 815

Answers (2)

Regent
Regent

Reputation: 5602

FormatterServices.GetSerializableMembers does not return any properties but rather fields of the serializable class.

So for instance of the following sample class:

    [Serializable]
    public class TestClass
    {
        private int _test;

        [MyAttribute]
        public int Test
        {
            get { return _test; }
            set { _test = value; }
        }
    }

FormatterServices.GetSerializableMembers with get use MemberInfo of _test field, but GetType().GetProperties() with return MemberInfo of the property.

And because the field itself doesn't have any attributes attached to it therefore GetCustomAttributes won't return anything.

Upvotes: 2

Willem van Rumpt
Willem van Rumpt

Reputation: 6570

Most likely, the first member returned in 

FormatterServices.GetSerializableMembers(recordObject.GetType());

is not actually the property you expected.

Upvotes: 1

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