Is winform PropertyGrid able to edit dynamic object?

Question

As we know that by default the winform PropertyGrid is able to edit properties of a predefined class. However, some times we might need to edit dynamic created objects. Refer to the code below:

ParamForm.Show(new { Firstname = "John", Lastname = "Herby" })

The ParamForm window contains 2 controls, a PropertyGrid and a Button. It is designed to be able to edit dynamic objects which contains string or boolean fields only.

public static dynamic Show(dynamic args)
{
    var frm = new ParamForm(args);
    frm.ShowDialog();
    return frm.Result;
}
public ParamForm(dynamic args)
{
    InitializeComponent();
    propertyGrid.SelectedObject = ag;
}

The problem is that the Firstname & Lastname displayed in PropertyGrid control is grayed out and cannot be edited. So how to make the PropertyGrid able to edit dynamic created objects?

Answer 1

Anonymous types have read only property descriptors (used by the property grid) by design (see here for more on this: Non-read only alternative to anonymous types).

You can however use tricks such as the DynamicTypeDescriptorWrapper class demonstrated here: Fun with C# 4.0’s dynamic that implement the ICustomTypeDescriptor Interface