Question

Following a sample of my code:

public abstract class<T>
{
   public List<T> GetSomething(string q)
   {
      **List<T> list = new List<T>();**

      Type type = typeof(T);
      PropertyInfo[] props = type.GetProperties(BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance);

      foreach (PropertyInfo info in props)
      {
          // at this point I need to return information from a data source query
          // and build the members (set values) according to the returning results
          // which needs to be added to a list that contains T with each property
          // within set to a value. "Some Value" should be an object instance required
          // by the Type of the PropertyInfo.

          info.SetValue(type, "Some Value", null);
          **list.Add(type);**
      }
   }

   **return list;**
}

info.SetValue(object, object, object[]) is not accessible, due to the template type, correct? My question here would be, how can I set a value on a property, contained within T?

Edit: The question confused even myself. I’ve amended the procedure above to represent my direct needs.

Thanks,
Eric

Answer 1

I can’t see how this makes any sense. You’re trying to set a property on an instance of T (as shown by your bindingflags,) but you are passing typeof(T) – a Type – to PropertyInfo.SetValue as the first argument. Perhaps you mean:

public abstract class Foo<T> 
{ 
   public List<T> GetSomethingFrom(T instance) 
   { 
      Type type = typeof(T); 
      PropertyInfo[] props = type.GetProperties(BindingFlags.Public |
           BindingFlags.IgnoreCase | BindingFlags.Instance); 

      foreach (PropertyInfo info in props) 
      { 
          info.SetValue(instance, "Some Value", null); 
      } 
   } 
} 

In this case, we’re passing an instance of T to the GetSomethingFrom method, then passing instance to SetValue. Follow?

-Oisin