Class RelayCommand

Describes a standard RelayCommand implementation commonly used under the MVVM pattern in WPF.

Inheritance

object

RelayCommand

Implements

ICommand

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: TheXDS.MCART.Component

Assembly: MCART.Wpf.Mvvm.dll

Syntax

public class RelayCommand : ICommand

Constructors

RelayCommand(Action<object?>)

Initializes a new instance of the RelayCommand class.

Declaration

public RelayCommand(Action<object?> action)

Parameters

Type	Name	Description
Action<object>	action	Command to execute.

RelayCommand(Action<object?>, Func<object?, bool>?)

Describes a standard RelayCommand implementation commonly used under the MVVM pattern in WPF.

Declaration

public RelayCommand(Action<object?> action, Func<object?, bool>? canExecute)

Parameters

Type	Name	Description
Action<object>	action	Command to execute.
Func<object, bool>	canExecute	Function that determines whether the command can be executed.

Methods

CanExecute(object?)

Defines the method that determines whether the command can execute in its current state.

Declaration

public bool CanExecute(object? parameter)

Parameters

Type	Name	Description
object	parameter	Data used by the command. If the command does not require data, this object can be set to null.

Returns

Type	Description
bool	true if the command can execute; otherwise false.

Execute(object?)

Defines the method to call when the command is invoked.

Declaration

public void Execute(object? parameter)

Parameters

Type	Name	Description
object	parameter	Data used by the command. If the command does not require data, this object can be set to null.

RaiseCanExecuteChanged()

Forces the command to re-evaluate CanExecute(object?).

Declaration

public static void RaiseCanExecuteChanged()

Events

CanExecuteChanged

Occurs when changes affect whether the command should execute.

Declaration

public event EventHandler? CanExecuteChanged

Event Type

Type	Description
EventHandler

Implements

ICommand

Extension Methods

Objects.ShallowCopyTo(object, object, Type)

ObjectExtensions.FieldsOf<T>(object)

ObjectExtensions.GetAttribute<T>(object)

ObjectExtensions.GetAttributes<T>(object)

ObjectExtensions.HasAttrValue<TAttribute, TValue>(object, out TValue)

ObjectExtensions.HasAttribute<T>(object)

ObjectExtensions.HasAttribute<T>(object, out T?)

ObjectExtensions.HasAttributes<T>(object, out IEnumerable<T>?)

ObjectExtensions.Is(object?, object?)

ObjectExtensions.IsEither(object, IEnumerable)

ObjectExtensions.IsEither(object, params object[])

ObjectExtensions.IsNeither(object, IEnumerable)

ObjectExtensions.IsNeither(object, params object[])

ObjectExtensions.IsNot(object?, object?)

ObjectExtensions.PropertiesOf<T>(object)

ObjectExtensions.WhichAre(object, IEnumerable<object>)

ObjectExtensions.WhichAre(object, params object[])

Common.IfNotNull<T>(T?, Action<T>)

Objects.Itself<T>(T)

Objects.ShallowCopyTo<T>(T, T)

CollectionExtensions.PushInto<TItem, TCollection>(TItem, ICollection<TCollection>)

DictionaryExtensions.PushInto<TKey, TValue>(TValue, TKey, IDictionary<TKey, TValue>)