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 [...]
In order to retrieve the highest value of a column in a list of collection, Linq offers a handy method to achieve this; Dim maxUnitsInStock = Aggregate prod In db.Products _ Into Max(prod.UnitsInStock)Simple!
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 [...]
If you ever need to retrieve data from EF using the name of a column, rather than the built in Intellisense, then the following vb.net code snippet may help. GetType(TypeOfEntity).GetProperty(NameOfColumn).GetValue(ActualEntity, Nothing)TypeOfEntity is the name of the Entity from which you wish to retrieve data. NameOfColumn is obviously the Name of the Column from which you [...]