XAML Binding.UpdateSourceTrigger when a Button.Click is fired?

Question

Hi

I want to set the UpdateSourceTrigger to an event of a control:

<TextBox Text="{Binding Field, UpdateSourceMode=btnOK.Click}">
<Button Name="btnOK">
    <Button.Triggers>
        <Trigger>
            <!-- Update source -->
        </Trigger>
    </Button.Triggers>
</Button>

I thought about two ways:

1. Set UpdateSourceMode or some other stuff in the binding.
2. Set an EventTrigger that updates source on button click.

Possible, or I have to do it with code?

Answer 1

You'll have to use code. Specifically:

1. Set UpdateSourceTrigger=Explicit on the TextBox.
2. Call UpdateSource when the user clicks the Button.

However, you can put the code in the code behind or in an attached behavior.

HTH, Kent