wpf shared ResourceDictionary file parameters?

Question

if all Styles and Converters are stored in shared resource dictionary file (styles.xaml), and this file is used from various windows.

Is it possible, to pass a parameter to that file, and propagate that parameter to the converters?

I am looking for a way to pass a "origin" type parameter, so that the converters could be aware which place they are being used from? Just a hint of which window/grid is using the converter at the moment..

Answer 1

See this article for Converters with parameters. I assume you define the Converter resource in Resource dictionary.

http://www.switchonthecode.com/tutorials/wpf-tutorial-binding-converters

Answer 2

I wonder if something like this will work:

Add a reference to the System namespace in the declaration of each Window or UserControl where you want this.

     xmlns:sys="clr-namespace:System;assembly=mscorlib"

Then in your resources section set things up like this:

<Window.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="styles.xaml"/>
        </ResourceDictionary.MergedDictionaries>
            <sys:String x:Key="WinConvertParam">IDTextForThisWindow</sys:String>
    </ResourceDictionary>
</Window.Resources>

Your binding syntax could then look something like this:

{Binding SomeProperty, 
         Converter={StaticResource thatConverterIWrote}, 
         ConverterParameter={StaticResource WinConvertParam}}

...and your Convert or ConvertBack methods in your conversion classes then become aware of the Window that's using them, provided you vary the value of that <sys:String/> from file to file.

What do you think?