Wpf binding not updating propertychanged

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So, based on the change in first name and last name, we have to automatically update the full name.

In the previous article we saw how changes in a Text Box was not immediately 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.

For those situations where you need more control of the process, this property will definitely help though.

Just make sure that you don't update the source value more often than you actually need to.

If you want the full control, you can use the Explicit value and then do the updates manually, but this does take a bit of the fun out of working with data bindings.

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For that reason, I have added a button next to the Text Box, which will update the source value on demand.

The first two has already been described, while the last one simply means that the update has to be pushed manually through to occur, using a call to Update Source on the Binding.

As you can see, each of the three textboxes now uses a different Update Source Trigger.

By day, Michael is a solutions architect at Amerisource Bergen Specialty Group where he delivers high quality enterprise software in . By night, he writes mobile applications in Java for the Andriod platform.

He blogs his discoveries along the way at Adventures In Software (

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