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Qbservable::FromEventPattern<TDelegate, TEventArgs> Method (IQbservableProvider, Expression<Action<TDelegate>>, Expression<Action<TDelegate>>)

Converts a .NET event, conforming to the standard .NET event pattern, to an queryable observable sequence with the specified add handler and remove handler.

Namespace:  System.Reactive.Linq
Assembly:  System.Reactive.Providers (in System.Reactive.Providers.dll)

[ExtensionAttribute]
public:
generic<typename TDelegate, typename TEventArgs>
where TEventArgs : EventArgs
static IQbservable<EventPattern<TEventArgs>^>^ FromEventPattern(
	IQbservableProvider^ provider, 
	Expression<Action<TDelegate>^>^ addHandler, 
	Expression<Action<TDelegate>^>^ removeHandler
)

Type Parameters

TDelegate

The type of delegate.

TEventArgs

The type for the event.

Parameters

provider
Type: System.Reactive.Linq::IQbservableProvider
The local Qbservable provider.
addHandler
Type: System.Linq.Expressions::Expression<Action<TDelegate>>
The action that attaches the given event handler to the underlying .NET event.
removeHandler
Type: System.Linq.Expressions::Expression<Action<TDelegate>>
The action that detaches the given event handler from the underlying .NET event.

Return Value

Type: System.Reactive.Linq::IQbservable<EventPattern<TEventArgs>>
The queryable observable sequence that contains data representations of invocations of the underlying .NET event.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQbservableProvider. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=vs.103).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.103).aspx.
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