绑定两个文本框使用caliburn.micro c＃wpf保持同步

Question

I use Caliburn.Micro and WPF. The View's name is : NewPlayView and the ViewModel's name is : NewPlayViewModel.

I have two textbox, I would like that by changing the value of textbox1, the value of textbox2 various accordingly. For example, if I put 10 in textbox1, textbox2 displays in 20 (10 * 2).

 <TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox1"/>
 <TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox2"/>

What i can do this ? Thanks

Answer 1

you either create 2 properties in your NewPlayViewModel model, lets say Value1 and Value2 and you bind them accordingly:

<TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox1" Text="{Binding Path=Value1}"/>
<TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox2" Text="{Binding Path=Value2}"/>

and when Value1 changes you recalculate Value2 (or vice versa) and notify UI that both values have changed

or you keep just one property, for example Value , create custom IValueConverter , implement both Convert and ConvertBack methods with your algorithm and bind it like this:

<TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox1" Text="{Binding Path=Value}"/>
<TextBox Height="22" HorizontalAlignment="Left" x:Name="textbox2" Text="{Binding Path=Value, Converter={StaticResource MyValueConverter}}"/>