Making a WPF TextBox binding fire on each new character?
In your textbox binding, all you have to do is set UpdateSourceTrigger=PropertyChanged.
data-binding
What is Lazy Loading?
It’s called lazy loading because, like a lazy person, you are putting off doing something you don’t want to. The opposite is Eager Loading, where you load something right away, long before you need it. If you are curious why people might use lazy loading, consider an application that takes a LOOOOONG time to start. … Read more
WPF CommandParameter is NULL first time CanExecute is called
I was having this same issue while trying to bind to a command on my view model. I changed it to use a relative source binding rather than referring to the element by name and that did the trick. Parameter binding didn’t change. Old Code: Command=”{Binding DataContext.MyCommand, ElementName=myWindow}” New Code: Command=”{Binding DataContext.MyCommand, RelativeSource={RelativeSource AncestorType=Views:MyView}}” Update: … Read more
What are the various WPF binding modes?
OneWay: Use this when you want the bound property to update the user interface. TwoWay: This has the same behavior as OneWay and OneWayToSource combined. The bound property will update the user interface, and changes in the user interface will update the bound property (You would use this with a TextBox or a Checkbox, for … Read more
WPF Bind to itself
Short answer:{Binding} is not a shortcut for “binding to itself” (in the sense of RelativeSource.Self). Rather, {Binding} is equivalent to {Binding Path=.}, which binds to the current source. To elaborate: A binding has a source and a path. You can do a “binding to itself”, for example, by using <myUIControl myProperty=”{Binding RelativeSource={RelativeSource Self}, Path=x}” /> … Read more
What does “{Binding Path=.}” mean in WPF binding?
I found this WPF Binding CheatSheet a few months back and find it very useful, especially for anyone learning WPF. There are some spelling mistakes within it, but it is still quite good. Here is a small excerpt (which is supposed to have tabular formatting): Basic Binding {Binding} Bind to current DataContext. {Binding Name} Bind … Read more
WPF Data Binding and Validation Rules Best Practices
I think the new preferred way might be to use IDataErrorInfo Read more here
List vs BindingList Advantages/DisAdvantages
A List<> is simply an automatically resizing array, of items of a given type, with a couple of helper functions (eg: sort). It’s just the data, and you’re likely to use it to run operations on a set of objects in your model. A BindingList<> is a wrapper around a typed list or a collection, … Read more
What approaches are available to dummy design-time data in WPF?
Using VS2010 you can use Design-Time attributes (works for both SL and WPF). I usually have a mock data-source anyway so it’s just a matter of: Adding the namespace declaration xmlns:d=”http://schemas.microsoft.com/expression/blend/2008″ Adding the mock data context to window/control resources <UserControl.Resources> <ViewModels:MockXViewModel x:Key=”DesignViewModel”/> </UserControl.Resources> Setting design-time data context <Grid d:DataContext=”{Binding Source={StaticResource DesignViewModel}}” … Works well enough.
AngularJS : ng-model binding not updating when changed with jQuery
Angular doesn’t know about that change. For this you should call $scope.$digest() or make the change inside of $scope.$apply(): $scope.$apply(function() { // every changes goes here $(‘#selectedDueDate’).val(dateText); }); See this to better understand dirty-checking UPDATE: Here is an example