通过

Observable.FromEventPattern<TDelegate、TEventArgs> 方法 (Func<EventHandler<TEventArgs>、TDelegate>、Action<TDelegate>、Action<TDelegate>)

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

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

语法

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

'Usage
Dim conversion As Func(Of EventHandler(Of TEventArgs), TDelegate)
Dim addHandler As Action(Of TDelegate)
Dim removeHandler As Action(Of TDelegate)
Dim returnValue As IObservable(Of EventPattern(Of TEventArgs))

returnValue = Observable.FromEventPattern(conversion, _
    addHandler, removeHandler)

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

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

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

JScript does not support generic types and methods.

类型参数

  • TDelegate
    委托的类型。
  • TEventArgs
    事件的类型。

参数

  • 转换
    类型： System.Func<EventHandler<TEventArgs>、TDelegate>
    用于将给定事件处理程序转换为与基础 .NET 事件兼容的委托的函数。
  • addHandler
    类型： System.Action<TDelegate>
    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<TDelegate>
    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