)} ,System.String)} ,System.Action{System.EventHandler{--1}},System.Action{System.EventHandler{--1}})}

TargetActionCommandBinder.BindCommandToObject(ICommand?, T?, IObservable) method¶

Defined in

Type: TargetActionCommandBinder Namespace: ReactiveUI.Reactive Assembly: ReactiveUI.Reactive.dll

Applies to

net10.0-ios26.0, net10.0-macos26.0, net10.0-maccatalyst26.0, net10.0-tvos26.0

Overloads¶

1. public IDisposable? BindCommandToObject<T>(ICommand? command, T? target, IObservable<object?> commandParameter) where T : class
2. public IDisposable? BindCommandToObject<T, TEventArgs>(ICommand? command, T? target, IObservable<object?> commandParameter, string eventName) where T : class
3. public IDisposable? BindCommandToObject<T, TEventArgs>(ICommand? command, T? target, IObservable<object?> commandParameter, Action<EventHandler<TEventArgs>> addHandler, Action<EventHandler<TEventArgs>> removeHandler) where T : class where TEventArgs : EventArgs

1. Overload¶

Attributes: [RequiresUnreferencedCode("String/reflection-based event binding may require members removed by trimming.")]

public IDisposable? BindCommandToObject<T>(ICommand? command, T? target, IObservable<object?> commandParameter) where T : class

View source

Inherited documentation

These docs were inherited from ICreatesCommandBinding. The member doesn't override them on this type.

Summary: Bind an ICommand to a UI object, in the "default" way. The meaning of this is dependent on the implementation. This method will discover which event to bind to (e.g., Click, MouseUp) based on the control type. Implement this if you have a new type of UI control that doesn't have Command/CommandParameter like WPF or has a non-standard event name for "Invoke".

Type parameters

Name	Description
`T`	The target type being bound.

Parameters

Name	Type	Description
`command`	ICommand?	The command to bind to the target.
`target`	`T?`	The target object to bind the command to.
`commandParameter`	IObservable	An observable providing the latest command parameter.

Returns: IDisposable? -- A disposable that tears down the binding, or null when binding is not possible.

Remarks

This binds via Target/Action, not via a .NET event. It requires that the runtime type exposes a Target property and that a selector named theAction: can be invoked on the target.

If the runtime type also exposes an Enabled property, it is synchronized with CanExecute and CanExecuteChanged.

2. Overload¶

Attributes: [RequiresUnreferencedCode("String/reflection-based event binding may require members removed by trimming.")]

public IDisposable? BindCommandToObject<T, TEventArgs>(ICommand? command, T? target, IObservable<object?> commandParameter, string eventName) where T : class

View source

Inherited documentation

These docs were inherited from ICreatesCommandBinding. The member doesn't override them on this type.

Summary: Bind an ICommand to a UI object to a specific event. This event may be a standard .NET event, or it could be an event derived in another manner (i.e. in MonoTouch). This method is fully AOT-compatible as it uses generic type parameters instead of reflection.

Type parameters

Name	Description
`T`	The target type being bound.
`TEventArgs`	The event args type of the named event.

Parameters

Name	Type	Description
`command`	ICommand?	The command to bind to the target.
`target`	`T?`	The target object to bind the command to.
`commandParameter`	IObservable	An observable providing the latest command parameter.
`eventName`	string	The name of the event to subscribe to.

Returns: IDisposable? -- A disposable that tears down the binding, or null when binding is not possible.

Remarks

        This overload binds to a named .NET event. It is reflection-based and therefore not trimming-safe.
        Prefer the add/remove handler overload when you can supply delegates.

3. Overload¶

public IDisposable? BindCommandToObject<T, TEventArgs>(ICommand? command, T? target, IObservable<object?> commandParameter, Action<EventHandler<TEventArgs>> addHandler, Action<EventHandler<TEventArgs>> removeHandler) where T : class where TEventArgs : EventArgs

View source

Inherited documentation

These docs were inherited from ICreatesCommandBinding. The member doesn't override them on this type.

Summary: Binds a command to a specific event on a target object using explicit add/remove handler delegates.

Type parameters

Name	Description
`T`	The target type being bound.
`TEventArgs`	The event args type of the subscribed event.

Parameters

Name	Type	Description
`command`	ICommand?	The command to bind to the target.
`target`	`T?`	The target object to bind the command to.
`commandParameter`	IObservable	An observable providing the latest command parameter.
`addHandler`	Action>	Adds the event handler to the target.
`removeHandler`	Action>	Removes the event handler from the target.

Returns: IDisposable? -- A disposable that tears down the binding, or null when binding is not possible.

Remarks

        This overload is fully AOT-compatible and should be preferred when an explicit event subscription API is available.

Exceptions

Type	Condition
System.ArgumentNullException	Thrown when `target`, `addHandler`, or `removeHandler` is `null`.