Wpf label content not updating
The Update Source Trigger property of a binding controls how and when a changed value is sent back to the source.
However, since WPF is pretty good at controlling this for you, the default value should suffice for most cases, where you will get the best mix of a constantly updated UI and good performance.
The second Text Box uses the Lost Focus value, which is actually the default for a Text binding.
It means that the source value will be updated each time the destination control loses focus.
When an action happens that causes a property to change that would not normally cause an update in the WPF controls bound to it, you raise the event and name the modified property. Once ready replace the XAML of the main window with the code below: property that combines the first and last names into a single string.
You can see that the bindings are connecting correctly because all three key controls contain names on loading.To see how all of these options work, I have updated the example from the previous chapter to show you all of them: As you can see, each of the three textboxes now uses a different Update Source Trigger.The first one is set to Explicit, which basically means that the source won't be updated unless you manually do it.This behavior is controlled by a property on the binding called Update Source Trigger.It defaults to the value "Default", which basically means that the source is updated based on the property that you bind to.