Attribute.IsDefined doesn't see attributes applied with MetadataType class

Question

If I apply attributes to a partial class via the MetadataType attribute, those attributes are not found via Attribute.IsDefined(). Anyone know why, or what

Answer 1

My solution for generic use. Get the attribute the property that you are looking for. Return null if not found.

If found, it returns the attribute itself. So you can have access to the properties inside the attribute if you wihs.

Hopes this help.

public static Attribute GetAttribute(this PropertyInfo PI, T t) where T: Type
{
    var Attrs = PI.DeclaringType.GetCustomAttributes(typeof(MetadataTypeAttribute), true);
    if (Attrs.Length < 1) return null;

    var metaAttr = Attrs[0] as MetadataTypeAttribute;
    var metaProp = metaAttr.MetadataClassType.GetProperty(PI.Name);
    if (metaProp == null) return null;

    Attrs = metaProp.GetCustomAttributes(t, true);
    if (Attrs.Length < 1) return null;
    return Attrs[0] as Attribute;
}