在运行时添加属性

Question

I have a List<Data> where:

class Data
{
   public string Name { get; set; }
}

and I use this list as the ItemsSource of a ListView .

The View of my ListView is a GridView with one GridViewColumn (iniltially) and I bind the property Data.Name using the DisplayMemberBinding of my GridViewColumn .

At run-time may happen that I add a new GridViewColumn to my GridView , so i need to bind a new property of Data to this new column.

How can I do this?

Answer 1

No, you can't add "regular" properties at runtime - frankly, for what you describe might want to bind to a DataTable, and map the data in. You can do this at runtime but it is pretty complex. DataTable has a full implementation already.

Answer 2

edit: it looks like I misunderstood the question. If you're trying to add a property to the Data class, then I think you're out of luck. If you already have the property and simply want to bind that existing property to the GridView , then the code below should help.

Assuming the DataContext of the GridView is already set, you can use something similar to the example at MSDN :

GridViewColumn gvc = new GridViewColumn();
gvc.DisplayMemberBinding = new Binding("Surname");
gvc.Header = "Surname";
gvc.Width = 100;
myGridView.Columns.Add(gvc);

Answer 3

Solution with adding actual property to the data instance is rather complicated,

but maybe one of these solutions will be sufficient

You can use dynamics (more details here: dynamics )

        dynamic dynamicData = new ExpandoObject();
        dynamicData.Name = "Name";
        dynamicData.Surname = "SomeSurname";

If you can rebuild collection of data items you can use anonymous types (more details here anonymous types )

        var data = new Data();
        string newPropertyName = "Surname";
        var data2 = new { Name = data.Name, newPropertyName = "SomeString" };

Unless you are using DataTemplates to bind to contrete type of Data.