In an application I am developing, I required that two checkboxes be validated together, when either one of them were clicked. I also needed to only show the Validation error once in my Error Message Box. To achieve this we first call the OnPropertyChanged routine, which in turn raises the PropertyChanged event, for each linked [...]
I needed to Limit several TextBoxes in my WPF MVVM application to only allow Numeric Characters. I stumbled upon a very useful post by Jermey Likeness which described a method using Attached Behaviours, which worked well for me; http://csharperimage.jeremylikness.com/2009/10/silverlight-behaviors-and-triggers_07.html I modified this code slightly to allow for Decimal point control also. The VB.net Code is [...]
I needed to be able to set the Focus of a control, using MVVM. This means of course, that we can’t interact directly with the View, but instead must rely on Binding. I found a very helpful post by Khalid Rafique which allows exactly this; http://codenicely.blogspot.co.uk/2012/01/how-to-set-textbox-focus-in-silverlight.html By making use of attached Interactivity Behaviours, we can [...]
I found recently than the Validation Error Adorners on my WPF Project when used within a Tab Control, would disappear if I changed tabs. After a little searching, I found this helpful post; http://karlshifflett.wordpress.com/2008/02/19/wpf-validation-errors-disappear-inside-tabcontrol-when-switching-tabitems/ You basically need to wrap your Tab Control Tab Content within a Adorner Decorator as follows; [fusion_builder_container hundred_percent="yes" overflow="visible"][fusion_builder_row][fusion_builder_column type="1_1" background_position="left [...]
While combining EF5 with WPF MVVM, I noticed that changes to individual properties within my bound DataContext weren’t updating the UI. This was of course because the the actual DataContext itself isn’t changing, but only the POCO Properties housed within in. However, each of the POCO Properties don’t individually raise an INotifyPropertyChanged event. In order [...]
