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XAML - ValueConverter Parameters and PropertyChanged callback

Posted By:      Posted Date: August 28, 2010    Points: 0   Category :WPF
Hi I am trying to use a IValueConverter on the flowdocument of a richtextbox. However, ideally I'd like to be able to inject some dependencies into the converter on construction or perhaps with a setter of some sort. Previously I've been using an IoC to construct a formatter-type object and can obviously specify the constructor dependency quite easily. However, I was hoping to use XAML and the IValueConverter as much as possible, but specifying the converter in the Grid.Resources requires a parameterless constructor. Are there other ways in which I can do this or do I need to think about the problem differently. In addition, because you cannot bind to a RichTextBox, I have introduced an AttachedProperty. Here's some code     Public Shared ReadOnly DocumentProperty As DependencyProperty = DependencyProperty.RegisterAttached("Document", GetType(FlowDocument), GetType(RichTextBoxExtensions), RichTextBoxFrameworkPropertyMetaData) Private Shared Function RichTextBoxFrameworkPropertyMetaData() As FrameworkPropertyMetadata Dim metaData = New FrameworkPropertyMetadata metaData.BindsTwoWayByDefault = True metaData.AffectsRender = True metaData.PropertyChangedCallback = New PropertyChangedCallback(Sub(obj, e) If _recursionProtection.Contains(Thread.CurrentThread) Then Return Dim rtb = CType

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