It's a good idea in principal - but if it were me I wouldn't let my model anywhere near my UI on all but the smallest projects. More often than not it causes heartache down the track...
From: OzSilverlight@ozsilverlight.com [mailto:ozsilverli...@ozsilverlight.com] On Behalf Of Stephen Price Sent: Tuesday, 19 May 2009 5:09 PM To: OzSilverlight@ozsilverlight.com Subject: Re: Silverlight Binding Expressions I read a blog post not so long ago that showed an example of this but rather than modifying the Data class being bound to, they uses a partial class (effectively adding an additional property to the Dataclass in its own file). This enabled them to bind to the new property without having to have access to the data class (ie if the data class was part of the generated proxy) Not actually tried it and not sure where that blog post is... will check my Del.icio.us<http://Del.icio.us> links and see if I bookmarked it. cheers, Stephen On Tue, May 19, 2009 at 8:42 AM, Ross Jempson <ross.jemp...@michaelhill.com.au<mailto:ross.jemp...@michaelhill.com.au>> wrote: Assuming the binding is one-way, and you 'own' the model to which you are binding, can't you extend it and create a derived property there? Lets say you were binding to a Person class public string Firstname { get; set; } public string LastName { get; set; } public string FullName { get { return Firstname + " " + LastName; } set { } } <Textblock Text="{Binding FullName From: Asheesh Soni [mailto:asheeshs...@gmail.com<mailto:asheeshs...@gmail.com>] Sent: Tuesday, 19 May 2009 10:37 AM To: OzSilverlight@ozsilverlight.com<mailto:OzSilverlight@ozsilverlight.com> Subject: Silverlight Binding Expressions Hello I have a very trivial problem, but all the solutions to it seem to be a bit of an overkill. Just looking for a simple solution.... So here's the problem: Bind a Textblock to more than one field.... (or a string and a field) For example: <Textblock Text="{Binding FirstName + " " + LastName}" /> Or, <Textblock Text="{Binding "You are logged in as:" + {LoginName}}" /> I know the following solutions already: 1. Have two Textblocks with clean and simple bindings. 2. Use a Converter (with ConvertBack for two way binding). 3. Use Xambda (Yeah, I mean a Generic Lambda Converter used in Xaml with a Lambda expression) References for Xambda: http://www.fikrimvarnet/lestirelim/?p=15<http://www.fikrimvar.net/lestirelim/?p=15> http://marlongrech.wordpress.com/2008/02/10/embed-code-in-xaml/ And I know advocates of Designer/Developer work flow will argue that embedding complex expressions in Xaml defeats the whole purpose and leads to the bad (or good) old days of spaghetti code. But I guess, having trivial code in Xaml (eg {FirstName} + {LastName}) shouldn't really be a problem. Basically, All I need is a built-in, in-line Converter for one-way binding in Xaml, without having to create my own one line Converters for such trivial transformations. Any ideas? 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