RelayCommand<T> Class

Definition

Namespace:: CommunityToolkit.Mvvm.Input

Assembly:: CommunityToolkit.Mvvm.dll

Package:: CommunityToolkit.Mvvm v8.4.0

Package:: CommunityToolkit.Mvvm v7.0.3

Source:: RelayCommand%7BT%7D.cs

Source:: RelayCommand%7BT%7D.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

A generic command whose sole purpose is to relay its functionality to other objects by invoking delegates. The default return value for the CanExecute method is true. This class allows you to accept command parameters in the Execute(T) and CanExecute(T) callback methods.

public sealed class RelayCommand<T> : CommunityToolkit.Mvvm.Input.IRelayCommand<T>, System.Windows.Input.ICommand

type RelayCommand<'T> = class
    interface IRelayCommand<'T>
    interface IRelayCommand
    interface ICommand

Public NotInheritable Class RelayCommand(Of T)
Implements ICommand, IRelayCommand(Of T)

Type Parameters

T

The type of parameter being passed as input to the callbacks.

Inheritance: Object
RelayCommand<T>

Implements: IRelayCommand IRelayCommand<T> ICommand

Constructors

RelayCommand<T>(Action<T>, Predicate<T>)	Initializes a new instance of the RelayCommand<T> class.
RelayCommand<T>(Action<T>)	Initializes a new instance of the RelayCommand<T> class that can always execute.

Methods

CanExecute(Object)	Determines whether the command can execute in its current state.
CanExecute(T)	Provides a strongly-typed variant of CanExecute(Object).
Execute(Object)	Defines the method to be called when the command is invoked.
Execute(T)	Provides a strongly-typed variant of Execute(Object).
NotifyCanExecuteChanged()	Notifies that the CanExecute(Object) property has changed.

Events

CanExecuteChanged

Occurs when changes take place that affect whether or not the command should execute.

Applies to

Share via