A 'Binding' cannot be set on the 'Source' property of type 'Binding'

Question

A 'Binding' cannot be set on the 'Source' property of type 'Binding'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

    <TreeView Height="400" Width="400">
    <TreeViewItem ItemsSource="{Binding Source={Binding Path=Data}, XPath=*, 
Converter={StaticResource stringToXmlDataProviderConverter},ConverterParameter=/root }" Header="header" />
    </TreeView>

• What is wrong with ItemsSource="{Binding Source={Binding Path=Data}?

  Data = "<root><parm1>1</parm1><parm2>2</parm2><parm3>3</parm3></root>"
  

I try to use this code sample. The differ is that I want to Bind the ItemsSource to data in datacontext. There is nothing wrong with the converter.

EDIT:

<TreeViewItem ItemsSource="{Binding Path=Data}" Header="Parameters" />

Fills TreeView with one element (the string). So datacontext is correct.

EDIT: This code works better. Is there a generic way to read XML in ThreeView? I don't know the structure of XML. In all examples I have seen you have to declare sub nodes types.

<TreeViewItem DataContext="{Binding Path=Data, Converter={StaticResource stringToXmlDataProviderConverter}}" ItemsSource="{Binding .}" Header="Parameters" />

Answer 1

Binding's property Source can't be bound because it is not a Dependency Property. Are sure you don't want to do this? :

{Binding Path=Data, XPath=*, Converter={StaticResource stringToXmlDataProviderConverter},ConverterParameter=/root}

EDIT:

A checklist to check while debugging bindings:

1) Have you correctly set DataContext?

2) Is the property visible to the XAML code?

3) Is the property accessed (put a breakpoint into its getter). Does it return the value it is supposed to?

4) Is the property updated correctly? Either of following scenarios must apply:

• The property is DependecyProperty

• The property notifies about its change via INotofyPropertyChanged

• The property value us finalized before calling InitializeComponent()