Navigating to ViewModel Outside of MvxViewModel Context

MvvmCross Navigation Using IMvxViewDispatcher

If you are familiar with mvvmcross platform, you probably know that there is nothing simpler then making a navigation from one viewmodel to another by simply calling ShowViewModel method that you get out of the box.

However, sometimes, you need to perform this kind of navigation outside the viewmodel.

Lucky us, we got an interface called IMvxViewDispatcher, which can be resolved using MvvmCross dependency injection.

Navigation

private void ShowViewModel<T>()
{
    var dispatcher = Mvx.Resolve<IMvxViewDispatcher>()
    dispatcher.ShowViewModel(new Cirrious.MvvmCross.ViewModels
                                           .MvxViewModelRequest(typeof(T), null, null, null));
}

Passing Parameters to ViewModel

You can pass parameters to viewmodel using MvxBundle object and receive them in InitFromBundle method.

//Creating parameters
Dictionary<string, string> bundle = new Dictionary<string, string>();
bundle.Add("some-key","some-value");

//Calling the method with bundle
ShowViewModel<SomeViewModelOfYours>(bundle);

                    
private void ShowViewModel<T>(object param = null)
{
    MvxBundle bundle = null;
    if (param != null)
    {
        //Creating MvxBundle from dictionary
        bundle = new MvxBundle(param.ToSimplePropertyDictionary());
    }

    var dispatcher = Mvx.Resolve<IMvxViewDispatcher>();
    dispatcher.ShowViewModel(new Cirrious.MvvmCross.ViewModels
                                      .MvxViewModelRequest(typeof(T), bundle, null,null));
}