RegisterCommand() public method

Registers the specified command.
Note that if the view model is not specified, the command must be unregistered manually in order to prevent memory leaks.
The is null.
public RegisterCommand ( ICommand command, IViewModel viewModel = null ) : void
command ICommand The command.
viewModel IViewModel The view model. If specified, the command will automatically be unregistered when the view model is closed.
return void
CompositeCommand Class Documentation
Example #1
0
            public void PreventsExecutionOfPartiallyExecutableCommand(bool checkCanExecuteOfAllCommandsToDetermineCanExecuteForCompositeCommand, bool expectedValue)
            {
                var compositeCommand = new CompositeCommand();

                compositeCommand.RegisterCommand(new Command(() => { }, () => false));
                compositeCommand.RegisterCommand(new Command(() => { }, () => true));

                compositeCommand.CheckCanExecuteOfAllCommandsToDetermineCanExecuteForCompositeCommand = checkCanExecuteOfAllCommandsToDetermineCanExecuteForCompositeCommand;

                Assert.AreEqual(expectedValue, ((ICatelCommand)compositeCommand).CanExecute(null));
            }
Example #2
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            public void UnregistersCommandForExecution()
            {
                var vm = new CompositeCommandViewModel();
                var compositeCommand = new CompositeCommand(); 

                compositeCommand.RegisterCommand(vm.TestCommand1, vm);
                compositeCommand.RegisterCommand(vm.TestCommand2, vm);

                compositeCommand.UnregisterCommand(vm.TestCommand1);

                compositeCommand.Execute();

                Assert.IsFalse(vm.IsTestCommand1Executed);
                Assert.IsTrue(vm.IsTestCommand2Executed);
            }
Example #3
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            public void AutomaticallyUnsubscribesCommandOnViewModelClosed()
            {
                var vm = new CompositeCommandViewModel();
                var compositeCommand = new CompositeCommand();

                compositeCommand.RegisterCommand(vm.TestCommand1, vm);

                Assert.IsFalse(vm.IsTestCommand1Executed);

                vm.CloseViewModel(false);

                compositeCommand.Execute();

                Assert.IsFalse(vm.IsTestCommand1Executed);
            }
Example #4
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            public void ThrowsArgumentNullExceptionForNullCommand()
            {
                var compositeCommand = new CompositeCommand();

                ExceptionTester.CallMethodAndExpectException<ArgumentNullException>(() => compositeCommand.RegisterCommand(null));
            }