“Placeholder does not exist in current context”

Question

I am trying to make a Navigation bar in Xamarin. I created a Context view with an x:name of Placeholder in my MainPage.xaml and when I go to call it in the xaml.cs page it says

Answer 1

Your Page class is simply missing the call to InitializeComponent. That is a method call to the partial class of the page which will internally do some processing for the XAML file (more information can be found here).

public partial class HomePage : ContentPage
{
    public HomePage()
    {
        InitializeComponent();
    } 

    void Icon1_Tapped (object sender, System.EventArgs e)
    {
        var page = new HomePage();
        PlaceHolder.ContentView = page.Content;

    }
}

Also please make sure the xaml file has the class type correctly set. In case you are using a ContentPage, you should have something like this:

<ContentPage 
    xmlns="http://xamarin.com/schemas/2014/forms"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="YourNamespace.HomePage">

<!-- your content -->

</ContentPage