Question

I have a search textbox on silverlight app where user types in search term and results are displayed in textblock, requirement is the search term matches should be highlighted in textblocks.

I have seen some examples of highlighting search terms in textblock but none using mvvm pattern. Im binding text property of textblock in viewmodel, i tried to access inline collection to specify different tags but later came to know that inline collection is not bindable.

<TextBlock Text="{Binding Description}"/>

This description is being set in ViewModel

Answer 1

OK i figured out how to do it in MVVM.

1. I used a RadRichTextBox control from Telerik to achieve the task.

2. I created a new class with dependency property as bindableXaml & method which converts string to XAML(created new RadRichTextBox in code to do highlight work in this and returned result as radDocument)

3. Attached it to RadRichTextBox, so in ViewModel the string from DB is converted into desired XAML format via StringToXaml method. You can achieve the same result using RichTextBox but the XAML created in it will require StringBuilder and RegEx.Match() to do highlight work.