How to bring username show it at Shell with xamarin?

Issue

How to bring username show it at Shell with xamarin?

enter image description here

Solution

At first, you can try to set the LoginPage as the MainPage in the App.cs:

 public App()
    {
        InitializeComponent();
        MainPage = new Page1();
    }

Then you can set the FlyoutHeader in the AppShell.xaml, such as:

<Shell.FlyoutHeader>
    <Label x:Name="header" />
</Shell.FlyoutHeader>

And then you can change AppShell's construction method, such as:

public AppShell(string name)
    {
        InitializeComponent();
        header.Text = name;
    }

Finally, you can set the App.Current.MainPage as AppShell in the login button's clicked event in the LoginPage, such as:

private void Button_Clicked(object sender, EventArgs e)
    {
        string name = "";
        App.Current.MainPage = new AppShell(name);
    }

In addition, you can also try to use mvvm and bind a string variable which is in the viewmodel to the control which you want to show the username. And then change the variable's value in the button clicked event.

Answered By - Liyun Zhang - MSFT