Custom errors

As mentioned in the Validation chapter, both connection and network validators return a validation result object. This object has a error viewmodel property that can be set in the constructor. The built-in ErrorMessageViewModel class can be used to display simple text-based error messages.

...
return new ConnectionValidationResult(false, new ErrorMessageViewModel("Error message goes here"));
...

Alternatively, you can create a custom viewmodel class and use it instead. The corresponding view will then be displayed when the network/connection is invalid.

...
return new ConnectionValidationResult(false, new MyCustomErrorViewModel());
...

public class MyCustomErrorViewModel : ReactiveObject
{
	static MyCustomErrorViewModel()
	{
		Splat.Locator.CurrentMutable.Register(() => new MyCustomErrorView(), typeof(IViewFor<MyCustomErrorViewModel>));
	}
	...
}

public partial class MyCustomErrorView : IViewFor<MyCustomErrorViewModel>
{
	...
}

If you need even more flexibility with the error messages, you can create a custom network view.