Silverlight Tips of the Day 系列翻译与领悟#6

SilverlightTipoftheDay#6:MonitoringforKeyboardandMouseEvents.

Silverlight2提供了鼠标和键盘事件的完整支持。你不仅可以监听整个应用程序的事件还可以在独立的控件级别监听它们。

下面是一个在应用程序级别监听所有键盘和鼠标事件的例子:

Page.xaml.cs:

namespaceSilverlightApplication

{

publicpartialclassPage:UserControl

{

publicPage()

{

InitializeComponent();

this.KeyDown+=newKeyEventHandler(Page_KeyDown);

this.KeyUp+=newKeyEventHandler(Page_KeyUp);

this.MouseEnter+=newMouseEventHandler(Page_MouseEnter);

this.MouseLeave+=newMouseEventHandler(Page_MouseLeave);

this.MouseLeftButtonDown+=newMouseButtonEventHandler(Page_MouseLeftButtonDown);

this.MouseLeftButtonUp+=newMouseButtonEventHandler(Page_MouseLeftButtonUp);

this.MouseMove+=newMouseEventHandler(Page_MouseMove);

}

voidPage_KeyDown(objectsender,KeyEventArgse)

{

}

voidPage_KeyUp(objectsender,KeyEventArgse)

{

}

voidPage_MouseEnter(objectsender,MouseEventArgse)

{

}

voidPage_MouseLeave(objectsender,MouseEventArgse)

{

}

voidPage_MouseLeftButtonDown(objectsender,MouseButtonEventArgse)

{

}

voidPage_MouseLeftButtonUp(objectsender,MouseButtonEventArgse)

{

}

voidPage_MouseMove(objectsender,MouseEventArgse)

{

}

}

}

要在控件级别上监听事件，你可以直接在XAML的控件上添加事件处理。在下面的例子中，我们为<Textblock>控件添加了鼠标左键按下和弹起的事件。

Page.xaml:

<UserControlx:Class="SilverlightApplication6.Page"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Width="400"Height="300">

<Gridx:Name="LayoutRoot"Background="White">

<TextBlockx:Name="FPS"MouseLeftButtonDown="FPS_MouseLeftButtonDown"

MouseLeftButtonUp="FPS_MouseLeftButtonUp">Hellothere</TextBlock>

</Grid>

</UserControl>

Page.xaml.cs:

namespaceSilverlightApplication

{

publicpartialclassPage:UserControl

{

publicPage()

{

InitializeComponent();

}

privatevoidFPS_MouseLeftButtonDown(objectsender,MouseButtonEventArgse)

{

FPS.Text="Mousebuttondown";

}

privatevoidFPS_MouseLeftButtonUp(objectsender,MouseButtonEventArgse)

{

FPS.Text="Mousebuttonup";

}

}

}

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