Xamarin Forms - Navigate to another page

Question

I'm using Xamarin Forms for Android and IOs app.

I have two pages, Login page and Main page. The logic I want to implement is: Check if user is Logged In, If no open "Login" page, if yes go to "Main" page.

I was trying to implement this using NavigationPage and Navigation.PushAsync method. But method not working without NavigationPage, and NavigatetionPage renders additional navigation bar at the top.

Now I'm using:

App.xaml.cs

    public App()
    {
        InitializeComponent();
        
        if (!isUserLoggedIn)
        {
            MainPage = new LoginPage();
        }
        else
        {
            MainPage = new MainPage();
        }
    }

LoginPage.xaml.cs

//When user authenticated
App.Current.MainPage = new MainPage();

This code works well, but I'm not sure if this is good and correct solution.

Is there any better way to implement same logic?

You can hide the navigation bar of NavigationPage. But what you're doing is fairly standard. — Jason

Leo Zhu - MSFT Leo Zhu - MSFT · Accepted Answer · 2020-09-24T01:42:07

You just need hide the Navigationbar in your LoginPage and MainPage.

public App()
{
    InitializeComponent();
    
    if (!isUserLoggedIn)
    {
        MainPage =  new NavigationPage(new LoginPage());
    }
    else
    {
        MainPage = new NavigationPage(MainPage());
    }
}

LoginPage.xaml.cs:

public LoginPage()
    {
        InitializeComponent();
        NavigationPage.SetHasNavigationBar(this, false);
    }

//When user authenticated
App.Current.MainPage = new NavigationPage(MainPage());

MainPage.xaml.cs:

public MainPage()
    {
        InitializeComponent();
        NavigationPage.SetHasNavigationBar(this, false);
    }

Xamarin Forms - Navigate to another page

1 Answers