Question

I have a collection of objects which has the following structure:

public class Parent
{
    public string Title { get; set; }
    public string Guid { get; set; }
}

public class Child:Parent
{
    public string Description { get; set; }
}

List<Parent> collection ;
collection  = new List<Parent>();

collection.Add(new Parent());
collection.Add(new Parent());
collection.Add(new Child());
collection.Add(new Child());
collection.Add(new Parent());

So some elements are from Parent type and some from Child type(I have inheritance relationship among the objects in the collection).

I used the following bindings:

txtTitle.DataBindings.Add("Text", _BindingSource, "Title");
txtGuid.DataBindings.Add("Text", _BindingSource, "Guid");
txtDescription.DataBindings.Add("Text", _BindingSource,"Description");

First two bindings obviously work fine. But what should I do to the third one to display the data properly?

Answer 1

In his book “Data Binding with Windows forms 2.0”, p. 125, author Brian Noyes says that items in a BindingSource must be homogenous, ie of the same type.

It would seem what you’re trying to do is not possible, at least not with a BindingSource component.