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WPF: Bindings Added to Users Impacted by UserControl Users

I have a custom control that allows you to add items to it by exposing the Grid Children property. Any control I add displays fine, but when I try to bind the property of the added item to a control in the main window, nothing happens (example):

<TextBox Name="txtTest" Text="Success!" />

<mycontrols:CustomUserControl.ExposedGridChildren>
     <TextBox Text="{Binding ElementName=txtTest, Path=Text, FallbackValue=fail}"/>
</mycontrols:CustomUserControl.ExposedGridChildren>

This example always causes the TextBox to show "fail". This is how I show the child elements in the custom control:

public UIElementCollection ExposedGridChildren
    {
        get { return grdContainer.Children; }
    }

Any thoughts? Is this a question of scale? I know I cannot name the elements that I am adding to the children due to scope errors. Thanks Brian.

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2 answers


I obviously did it all wrong. What I needed to do was create a look and feel and a template to have one (or more) contentpresenter (s).



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This might answer your question: How do you bind the children of the grid to the list?

Or, as the WPF doctor says: ( http://drwpf.com/blog/2007/10/15/itemscontrol-a-is-for-abundance/ )



Is the panel an ItemsControl?

No. The logical children of a panel are UIElements, while the logical children of a control (its Elements) can be any CLR objects.

Sidebar: So what is a sidebar? The main role of the panel is to provide the layout with support for its children. Although a panel supports a collection of children, it is not technically a WPF "control" ... That is, it is not derived from the base Control class and it does not support the WPF templated concept. Instead, it is a single element with a single purpose ... namely, to size and position (aka, measure and arrange) its children.

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