SL - 整理 - Behavior

behavior是trigger的高级用法，能更加灵活的处理事件，主要是能灵活的获得页面中的元素。它需要一个起点来使this.AssociatedObject有值

---

xmlns:Interactivity="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

xmlns:MyInteractivity="clr-namespace:xxxxxxxxxx.xxxxxxxx.Interactivities"

---

<Interactivity:Interaction.Behaviors>

<MyInteractivity:LookupIssuerBehavior>

<Interactivity:Interaction.Triggers>

<Interactivity:EventTrigger SourceName="LayoutRoot" EventName="GotFocus">

<Interactivity:InvokeCommandAction CommandName="GotFocusCommand" />

</Interactivity:EventTrigger>

</Interactivity:Interaction.Triggers>

</MyInteractivity:LookupIssuerBehavior>

</Interactivity:Interaction.Behaviors>

---

using System.Windows.Interactivity;

///

<summary>

/// LookupIssuer Behavior

/// </summary>

public class LookupIssuerBehavior : Behavior<UserControl>

{

public LookupIssuerBehavior()

{

}

void AssociatedObjectKeyDown(object sender, KeyEventArgs e)

{

if (e.Key == Key.Enter)

{

var viewModel = this.AssociatedObject.DataContext as DataModels.IssuerViewModels.LookupIssuerViewModel;

viewModel.Search();

}

}

void tbxBusinessDomainOwnerKeyUpProcess(object sender, KeyEventArgs e)

{

LookupIssuerViewModel viewModel = this.AssociatedObject.DataContext as LookupIssuerViewModel;

viewModel.BusinessDomainOwner = (sender

as TextBox).Text;

}

protected override void OnAttached()

{

base.OnAttached();

this.AssociatedObject.Loaded += new RoutedEventHandler(AssociatedObjectLoaded);

}

void AssociatedObjectLoaded(object sender, RoutedEventArgs e)

{

this.AssociatedObject.KeyDown += new KeyEventHandler(AssociatedObjectKeyDown);

TextBox tbxBusinessDomainOwner = this.AssociatedObject.FindName("tbxBusinessDomainOwner") as TextBox;

tbxBusinessDomainOwner.KeyUp +=

new KeyEventHandler(tbxBusinessDomainOwnerKeyUpProcess);

}

protected override void OnDetaching()

{

base.OnDetaching();

this.AssociatedObject.Loaded -= new RoutedEventHandler(AssociatedObjectLoaded);

}

}