通过

Observable.FromEventPattern<TEventArgs> 方法 (Action<EventHandler<TEventArgs>>，Action<EventHandler<TEventArgs>>)

将符合标准 .NET 事件模式的 .NET 事件转换为具有指定添加处理程序和删除处理程序的可观察序列。

Namespace：System.Reactive.Linq
装配： System.Reactive.dll) 中的 System.Reactive (

语法

'Declaration
Public Shared Function FromEventPattern(Of TEventArgs As EventArgs) ( _
    addHandler As Action(Of EventHandler(Of TEventArgs)), _
    removeHandler As Action(Of EventHandler(Of TEventArgs)) _
) As IObservable(Of EventPattern(Of TEventArgs))

'Usage
Dim addHandler As Action(Of EventHandler(Of TEventArgs))
Dim removeHandler As Action(Of EventHandler(Of TEventArgs))
Dim returnValue As IObservable(Of EventPattern(Of TEventArgs))

returnValue = Observable.FromEventPattern(addHandler, _
    removeHandler)

public static IObservable<EventPattern<TEventArgs>> FromEventPattern<TEventArgs>(
    Action<EventHandler<TEventArgs>> addHandler,
    Action<EventHandler<TEventArgs>> removeHandler
)
where TEventArgs : EventArgs

public:
generic<typename TEventArgs>
where TEventArgs : EventArgs
static IObservable<EventPattern<TEventArgs>^>^ FromEventPattern(
    Action<EventHandler<TEventArgs>^>^ addHandler, 
    Action<EventHandler<TEventArgs>^>^ removeHandler
)

static member FromEventPattern : 
        addHandler:Action<EventHandler<'TEventArgs>> * 
        removeHandler:Action<EventHandler<'TEventArgs>> -> IObservable<EventPattern<'TEventArgs>>  when 'TEventArgs : EventArgs

JScript does not support generic types and methods.

类型参数

  • TEventArgs
    事件的类型。

参数

  • addHandler
    类型： System.Action<EventHandler<TEventArgs>>
    将给定事件处理程序附加到基础 .NET 事件的操作。
  • removeHandler
    类型： System.Action<EventHandler<TEventArgs>>
    将给定事件处理程序与基础 .NET 事件分离的操作。

返回值

类型： System.IObservable<EventPattern<TEventArgs>>
包含基础 .NET 事件调用的数据表示形式的可观察序列。

另请参阅

参考

可观测类

FromEventPattern 重载

System.Reactive.Linq 命名空间