Binding to interface and displaying properties in base interface
c#, datagridview, datasource, interface
Solution
`DataGridView` does not use `TypeConverter`; `PropertyGrid` uses `TypeConverter`.
If it relates to list-controls like `DataGridView`, then the other answer is wrong.
To provide custom properties on a list, you need one of:
- `ITypedList` on the data-source
- `TypeDescriptionProvider` on the type
Both are non-trivial.
Problem
This question (along with its answer) explains why you can't easily bind a DataGridView to an interface type and get columns for properties inherited from a base interface. The suggested solution is to implement a custom TypeConverter. My attempt is below. However, creating a DataSource and DataGridView bound to ICamel still only results in one column (Humps). I don't think that my converter is being used by .NET to decide which properties it can see for ICamel. What am I doing wrong? ``` [TypeConverter(typeof(MyConverter))] public interface IAnimal { string Name { get; set; } int Legs { get; set; } } [TypeConverter(typeof(MyConverter))] public interface ICamel : IAnimal { int Humps { get; set; } } public class MyConverter : TypeConverter { public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes) { if(value is Type && (Type)value == typeof(ICamel)) { List<PropertyDescriptor> propertyDescriptors = new List<PropertyDescriptor>(); foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(typeof(ICamel))) { propertyDescriptors.Add(pd); } foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(typeof(IAnimal))) { propertyDescriptors.Add(pd); } return new PropertyDescriptorCollection(propertyDescriptors.ToArray()); } return base.GetProperties(context, value, attributes); } public override bool GetPropertiesSupported(ITypeDescriptorContext context) { return true; } } ```