I am using a Watermark textbox as in Watermark TextBox in WPF
<Grid Grid.Row="0" Background="{StaticResource brushWatermarkBackground}" Style="{StaticResource EntryFieldStyle}" >
<TextBlock Margin="5,2" Text="This prompt dissappears as you type..." Foreground="{StaticResource brushWatermarkForeground}"
Visibility="{Binding ElementName=txtUserEntry, Path=Text.IsEmpty, Converter={StaticResource BooleanToVisibilityConverter}}" />
<TextBox Name="txtUserEntry" Background="Transparent" BorderBrush="{StaticResource brushWatermarkBorder}" />
</Grid>
How can I apply this for a PasswordBox?
The general approach is the same: write a custom control style, and show the watermark whenever the password box is empty. The only problem here is that
PasswordBox.Password
is not a dependency property, and you can't use it in a trigger. Also PasswordBox is sealed, so you can't override this notification behavior, but you can use attached properties here.The following code demonstrates how.
XAML:
C#:
Please notice
PasswordBoxMonitor
in XAML code.