Binding Setter.Value from code

Question

In XAML I can write something like this:

<Setter Property="PropertyName" Value="{Binding ...}" />

How would I do this in code? I've constructed bindings in code before, but I can't seem to find any static ValueProperty object on the Setter class to pass to BindingOperations.SetBinding().

Inertia

Answer 1

When setting a binding on a Setter you don't need BindingOperations at all. All you need to do is:

var setter = new Setter(TextBlock.TextProperty, new Binding("FirstName"));

or equivalently

var setter = new Setter
{
  Property = TextBlock.TextProperty,
  Value = new Binding("FirstName"),
};

either of these would be equivalent to

<Setter Property="TextBlock.Text" Value="{Binding FirstName}" />

The reason this works is that Setter.Value is an ordinary CLR property, not a DependencyProperty and as such it can't be bound. So there is no ambiguity in either the XAML or the code when you store a Binding object in it.

When the Setter is actually applied to an object, if a Binding is found in the Setter, the equivalent of BindingOperations.SetBinding is called. Otherwise the property is set directly.

Tumbrel

Ah, thanks for clearing that up. It seemed odd to me that there was no ValueProperty in Setter, but I never thought of just setting the value to a Binding object. :) Cheers Ray--you've been helping me a lot lately. ;) – Inertia