Class ExceptionHandlingRelayCommand

A relay command that handles exceptions by showing them to the user. This class wraps an existing action and executes it when the command is invoked. If the action throws an exception, the exception is caught and is shown via IMessageManager.ShowMessage().

Inheritance

object

ExceptionHandlingRelayCommand

Implements

IRelayCommand

ICommand

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Benday.Presentation

Assembly: Benday.Presentation.dll

Syntax

public class ExceptionHandlingRelayCommand : IRelayCommand, ICommand

Constructors

ExceptionHandlingRelayCommand(IMessageManager, Action)

Creates a new instance of the ExceptionHandlingRelayCommand class.

Declaration

public ExceptionHandlingRelayCommand(IMessageManager msgManager, Action execute)

Parameters

Type	Name	Description
IMessageManager	msgManager	Instance of IMessageManager to use
Action	execute	The action to perform

Exceptions

Type	Condition
ArgumentNullException

Methods

CanExecute(object?)

Returns true if the command can be executed.

Declaration

public bool CanExecute(object? parameter)

Parameters

Type	Name	Description
object	parameter

Returns

Type	Description
bool	This class always returns true.

Execute(object?)

Executes the action and handles any exceptions by showing them to the user.

Declaration

public void Execute(object? parameter)

Parameters

Type	Name	Description
object	parameter

NotifyCanExecuteChanged()

Notifies that the CanExecute(object) property has changed.

Declaration

public void NotifyCanExecuteChanged()

Events

CanExecuteChanged

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

Declaration

public event EventHandler? CanExecuteChanged

Event Type

Type	Description
EventHandler

Implements

IRelayCommand

ICommand