绑定到UserControl属性

Question

I have an UserControl property in the presenter:

public UserControl Control { get; set; }

The XAML code:

<ContentControl Content="{Binding Control}"/>

When I run the application I get this error:

System.Windows.Data Error: 40 : BindingExpression path error: 'Presenters' property not found on 'object' ''MainPresentet' (HashCode=24706823)'. BindingExpression: Path=Presenters; DataItem='MainPresenter' (HashCode=24706823); target element is 'ItemsControl' (Name=' '); target property is 'ItemSource' (type 'IEnumerable')

I tried to change the property to IEnumerable and use ItemsControl and I got same error.

I dont know the name of the UserControl because I get him from other dll in runtime

Answer 1

Your error is pretty clear:

System.Windows.Data Error: 40 : BindingExpression path error: 'Presenters' property not found on 'object' ''MainPresentet' (HashCode=24706823)'. BindingExpression: Path=Presenters; DataItem='MainPresenter' (HashCode=24706823); target element is 'ItemsControl' (Name=' '); target property is 'ItemSource' (type 'IEnumerable')

This means that somewhere in your code, you have tried to data bind to a property named Presenters , but that the DataContext where you tried that is actually set to an object of type MainPresenter and this object does not have a public Presenters property declared in it. This Binding was set on an ItemSource property of an ItemsControl , or derived class, like a ListBox .

Therefore, this error has nothing to do with your displayed code and you will need to search your code for the Presenters Binding Path and fix that Binding .