wpf自定義控件中使用自定義事件
1 創建自定義控件及自定義事件
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/// <summary>
/// 演示用的自定義控件
/// </summary>
public
class
ExtButton : Button
{
public
ExtButton()
{
base
.Click += ExtButton_Click;
}
private
void
ExtButton_Click(
object
sender, RoutedEventArgs e)
{
//定義傳遞參數
// RoutedPropertyChangedEventArgs<Object> args = new RoutedPropertyChangedEventArgs<Object>("1", "2", ControlLoadOverEvent);
RoutedEventArgs args2 =
new
RoutedEventArgs(ControlLoadOverEvent,
this
);
//引用自定義路由事件
this
.RaiseEvent(args2);
}
/// <summary>
/// 聲明路由事件
/// 參數:要注冊的路由事件名稱，路由事件的路由策略，事件處理程序的委托類型(可自定義)，路由事件的所有者類類型
/// </summary>
public
static
readonly
RoutedEvent ControlLoadOverEvent = EventManager.RegisterRoutedEvent(
"ControlLoadOverEvent"
, RoutingStrategy.Bubble,
typeof
(RoutedPropertyChangedEventArgs<Object>),
typeof
(ExtButton));
/// <summary>
/// 處理各種路由事件的方法
/// </summary>
public
event
RoutedEventHandler ControlLoadOver
{
//將路由事件添加路由事件處理程序
add { AddHandler(ControlLoadOverEvent, value); }
//從路由事件處理程序中移除路由事件
remove { RemoveHandler(ControlLoadOverEvent, value); }
}
}
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2 使用並綁定自定義控件的事件
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<!--i為System.Windows.Interactivity引用-->
<ext:ExtButton x:Name=
"extButton"
Content=
"綁定自定義事件"
HorizontalAlignment=
"Left"
Margin=
"123,10,0,0"
VerticalAlignment=
"Top"
Width=
"95"
>
<i:Interaction.Triggers>
<i:EventTrigger EventName=
"ControlLoadOver"
>
<i:InvokeCommandAction Command=
"{Binding ButtonLoadOverCommand}"
CommandParameter=
"{Binding ElementName=extButton}"
></i:InvokeCommandAction>
</i:EventTrigger>
</i:Interaction.Triggers>
</ext:ExtButton>
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3 觸發自定義事件后的操作
方式1
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public
DelegateCommand<Object> ButtonLoadOverCommand {
get
;
set
; }
public
void
ButtonLoadOver(Object obj)
{
//這里的參數為自定義控件對象
ExtButton btn = obj
as
ExtButton;
if
(btn !=
null
)
{
var content = btn.Content;
}
}
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方式2
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this
.extButton.ControlLoadOver += ExtButton_ControlLoadOver;
private
void
ExtButton_ControlLoadOver(
object
sender, RoutedEventArgs e)
{
var btn = (Button)e.Source;
var str = btn.Content;
}
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