I can simply fire the event and worse case scenario, I execute an empty function body rather than throwing a Null Reference Exception. With the INotify Propety Changed in place, changing one Text Box will cause its twin to display the same value and same for the two Combo Boxes.This is tidier in my opinion than the if(Property Changed ! We get a strange new requirement that every second change should be ignored.Now, all of that aside, let’s go over the more common properties used in Data Binding to a Selector control.
This is fine for check boxes and other simple controls, but it is usually not appropriate for text fields.
This is more precise and understandable to me to say that a ‘Delay’ property has been added to the Binding markup extension !
This post is a part of the serie on WPF 4.5 new features.
This works because internally when the cell is being generated, the Content of the cell will have its layout updated which will make it part of the visual tree and it will have access to the correct Data Context.
The default is Default, which returns the default Update Source Trigger value of the target dependency property.
Since WPF 4.5, the Binding has a new property named ‘Delay’ which defines a timespan after which the source is updated. As this is an added property on the Binding, you only have to define it on each Binding you create.