public HelloWorldViewModel()
{
firstName = Factory.Backing(nameof(FirstName), "Anton", NotNullOrWhitespace.Then(NotEqual("Foo")));
lastName = Factory.Backing(
nameof(LastName),
"Tcholakov",
NotNullOrWhitespace.Then(NotEqual("Bar")).Then(x => x.Length < 10, "Length cannot exceed 10 characters"));
sayHello = Factory.CommandAsyncChecked(
Greet,
() => this.IsValid && !this.OperationExecuting,
cts.Token,
exn => MessageBox.Show("Sorry I was too slow :-(."),
nameof(IsValid),
nameof(OperationExecuting));
cancelCommand = Factory.CommandSyncChecked(
() => this.cts?.Cancel(),
() => this.OperationExecuting,
nameof(OperationExecuting));
DependencyTracker.AddPropertyDependencies(nameof(ReadyToGreet), nameof(OperationExecuting));
DependencyTracker.AddPropertyDependencies(nameof(FullName), nameof(FirstName), nameof(LastName));
DependencyTracker.AddPropertyDependencies(nameof(Greeting), nameof(FullName));
}
