为何在wpf中textbox的值有时不会实时的变化
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:Microsoft_Practices_Prism_Interactivity="clr-namespace:Microsoft.Practices.Prism.Interactivity;assembly=Microsoft.Practices.Prism.Interactivity"
<TextBox Text="{Binding Path=test,Mode=TwoWay}">
<i:Interaction.Behaviors>
<Microsoft_Practices_Prism_Interactivity:UpdateTextBindingOnPropertyChanged/>
</i:Interaction.Behaviors>
</TextBox>