C# setting property values through reflection with attributes

Question

I am trying to build an object through an attribute on a classes property that specifies a column in a supplied data row that is the value of the property, as below:

Answer 1

There are a couple of separate issues here

• typeof(MyClass).GetCustomAttributes(bool) (or GetType().GetCustomAttributes(bool)) returns the attributes on the class itself, not the attributes on members. You will have to invoke typeof(MyClass).GetProperties() to get a list of properties in the class, and then check each of them.

• Once you got the property, I think you should use Attribute.GetCustomAttribute() instead of MemberInfo.GetGustomAttributes() since you exactly know what attribute you are looking for.

Here's a little code snippet to help you start:

PropertyInfo[] properties = typeof(MyClass).GetProperties();
foreach(PropertyInfo property in properties)
{
    StoredDataValueAttribute attribute =
        Attribute.GetCustomAttribute(property, typeof(StoredDataValueAttribute)) as StoredDataValueAttribute;

    if (attribute != null) // This property has a StoredDataValueAttribute
    {
         property.SetValue(instanceOfMyClass, attribute.DataValue, null); // null means no indexes
    }
}

EDIT: Don't forget that Type.GetProperties() only returns public properties by default. You will have to use Type.GetProperties(BindingFlags) to get other sorts of properties as well.