Binding to a property of an object through object[property] rather than object.property

问题

I've read through the WPF Data Binding Overview and I feel like this should be possible but I can't quite make the mental leap here. I know that if I set a binding's Path to foo, and set the Source to obj, then the binding will look at obj.foo. In other words, obj.__getattr__() will be accessed.

All I want is to make it look at obj[foo] instead. I'm using Ironpython and in this case my obj class has an overridden __getitem__() that calls a member function and returns a value, which is why I need this functionality.

Here is the above example written programmatically. This displays the foo property of obj in a checkbox:

myBinding = Binding("foo")
myBinding.Source = obj          
acheckbox.SetBinding(CheckBox.IsCheckedProperty, myBinding)

---

Solution

It's as simple as this, apparently!

myBinding = Binding("[foo]")
myBinding.Source = obj          
acheckbox.SetBinding(CheckBox.IsCheckedProperty, myBinding)

回答1:

You can just use that in a binding, e.g. if my DataContext/source has a property

public string this[int i]
{
    get{...}
    set{...}
}

you can create a binding like this:

<TextBlock Text="{Binding [0]}"/>

Edit: I feel like i might have misunderstood your question, if so please tell me.

来源：https://stackoverflow.com/questions/4947758/binding-to-a-property-of-an-object-through-objectproperty-rather-than-object-p