I am very new to WPF and testing some things that I would like to include in an application that I will be working on.
I have a 2 row List View (bound to a textbox) with the names Scott Guthrie and Jon Skeet in it.
Here's an example: The first place you will want to look is the Visual Studio Output window.
A common requirement for any user interface application that accepts user input is to validate the entered information to ensure that it has the expected format and type for the back-end to be able to accept and persist it.
This post is about how data validation works in WPF and the different validation options there are available including implementing custom Validation Rules and using the In a typical WPF application that uses the MVVM (Model-View-View Model) design pattern, a dependency property of a user interface control in a XAML-defined view uses data binding to bind to some data returned by a CLR property of the view model.
There will be loads of output from the debugger, but somewhere you should find a line like this, when running the above example: System. Data Error: 40 : Binding Expression path error: 'Non Existing Property' property not found on 'object' ''Grid' (Name='pnl Main')'.
Binding Expression: Path=Non Existing Property; Data Item='Grid' (Name='pnl Main'); target element is 'Text Block' (Name=''); target property is 'Text' (type 'String') It tells you that you have tried to use a property called "Non Existing Property" on an object of the type Grid, with the name pnl Main.
Okay, this post isn’t really about creating a full blown Natural User Interface (NUI)…
I just wanted to jump on the NUI bandwagon while it’s still the cool new thing!
I had some extra time this weekend, so I refactored one of my early looping panels into something that might be useful for a wider audience.
This post also includes a simple demo showing how the Loop Panel can be used as the items host of a custom List Box class.
In the UI, I simply bind the List View against the list of Programmers in the View Model (the Data Context, unless otherwise stated, is the root of the binding path).