AppShell InitializeComponent Missing in Xamarin Forms App

Question

I'm a new developer and I'm developing a xamarin forms app. I have some issues in my app.

I didn't use AppShell navigation at first, I used PushModalAsync() method to navigate between pages but now when user want to go home screen of phone then come back later to my application, it restarts the application. I tried another application and I saw that app uses appshell and it works good I mean it works as I want. When navigate from background It continue where it stay.

So now I want to add AppShell Navigation to my xamarin forms app but this InitializeComponent() missing in my AppShell.xaml.cs file.

Should I open a new project or is there any way to add this to my existing app easyly ?

AppShell.xaml

<Shell  xmlns:xaml="http://xamarin.com/schemas/2014/forms/design" 
         xmlns="http://xamarin.com/schemas/2014/forms" 
         xmlns:view="clr-namespace:İdaServis.View"
         FlyoutWidth="400"
         FlyoutHeight="200">
<Shell.Resources>
    <ResourceDictionary>
        <Style  TargetType="Element">
            <Setter Property="Shell.BackgroundColor" Value="{StaticResource Primary}" />
            <Setter Property="Shell.ForegroundColor" Value="White" />
            <Setter Property="Shell.TitleColor" Value="White" />
            <Setter Property="Shell.DisabledColor" Value="#B4FFFFFF" />
            <Setter Property="Shell.UnselectedColor" Value="#95FFFFFF" />
            <Setter Property="Shell.TabBarBackgroundColor" Value="{StaticResource Primary}" />
            <Setter Property="Shell.TabBarForegroundColor" Value="White"/>
            <Setter Property="Shell.TabBarUnselectedColor" Value="#95FFFFFF"/>
            <Setter Property="Shell.TabBarTitleColor" Value="White"/>
        </Style>
        <Style TargetType="TabBar" BasedOn="{StaticResource BaseStyle}" />
        <Style TargetType="FlyoutItem" BasedOn="{StaticResource BaseStyle}" />

        <!--
        Default Styles for all Flyout Items
        https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/flyout#flyoutitem-and-menuitem-style-classes
        -->
        <Style Class="FlyoutItemLabelStyle" TargetType="Label">
            <Setter Property="TextColor" Value="White"></Setter>
        </Style>
       
        <!--
        Custom Style you can apply to any Flyout Item
        -->
        
    </ResourceDictionary>
</Shell.Resources>
<FlyoutItem Title="About" Icon="icon_about.png">
    <ShellContent Route="AboutPage" ContentTemplate="{DataTemplate local:AboutPage}" />
</FlyoutItem>
<FlyoutItem Title="Browse" >
    <ShellContent Route="ItemsPage" ContentTemplate="{DataTemplate local:ItemsPage}" />
</FlyoutItem>
<FlyoutItem Title="ProfilePage" >
    <ShellContent Route="ProfilePage" ContentTemplate="{DataTemplate view:ProfilePage}" />
</FlyoutItem>
<FlyoutItem Title="AdminPage" >
    <ShellContent Route="AdminPage" ContentTemplate="{DataTemplate view:AdminPage}" />
</FlyoutItem>
<FlyoutItem Title="BarkodOzetTabbedPage" >
    <ShellContent Route="BarkodOzetTabbedPage" ContentTemplate="{DataTemplate view:BarkodOzetTabbedPage}" />
</FlyoutItem>
<FlyoutItem Title="DepoAktarmaPage" >
    <ShellContent Route="DepoAktarmaPage" ContentTemplate="{DataTemplate view:DepoAktarımBarkodPage}" />
</FlyoutItem>
<FlyoutItem Title="RaporSecimPage" >
    <ShellContent Route="RaporSecimPage" ContentTemplate="{DataTemplate view:RaporSecimPage}" />
</FlyoutItem>
<FlyoutItem Title="RaporDetailpage" >
    <ShellContent Route="RaporDetailpage" ContentTemplate="{DataTemplate view:RaporDetailPage}" />
</FlyoutItem>
<FlyoutItem Title="SayimEvrakSec" >
    <ShellContent Route="SayimEvrakSec" ContentTemplate="{DataTemplate view:SayimGirisEvrakSec}" />
</FlyoutItem>
<FlyoutItem Title="SayimEvrakPage" >
    <ShellContent Route="SayimEvrakPage" ContentTemplate="{DataTemplate view:SayimGirisEvrak}" />
</FlyoutItem>




<TabBar>
    <ShellContent Route="LoginPage" ContentTemplate="{DataTemplate local:LoginPage}" />
</TabBar>

Answer 1

Your AppShell.xaml is missing the x:Class attribute specifying the class name. This is required for the partial class to have the XAML as a complementary part:

<Shell xmlns:xaml="http://xamarin.com/schemas/2014/forms/design" 
       xmlns="http://xamarin.com/schemas/2014/forms" 
       xmlns:view="clr-namespace:İdaServis.View"
       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
       x:Class="YourAppNamespace.AppShell">

Just replace the "YourAppNamespace" with the actual namespace where the C# part of your AppShell class lives.

After this, the InitializeComponent() method should become available.