Xamarin-找不到类型或名称空间名称

Question

I am trying to used Navigation.PushAsync to go to a new page in my Xamarin Forms application. I have a page called InvMachineryItem.xaml in the same folder as the page I am currently on.

In my current page I have a list. When the list is clicked, the new page should open.

Here is my code:

     using myCoolApp.Views; //folder with the pages in it

     async void navigateView()
     {
        Page page = new InvMachineryItem();
        await Navigation.PushAsync(page);
     }

     void machineList_ItemSelected(object sender, SelectedItemChangedEventArgs e)
     {
            navigateView();
            //...more stuff
     }

The problem is I am receiving an error:

The type or namespace name "InvMachineryItem' could not be found (are you missing a using directive or an assembly reference?)

I am confused because they are in the same folder, and I am also implementing a using statement as well.

For additional context, here is the InvMachineryItem.xaml.cs class

namespace myCoolApp.Views.Inventory
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class InvMachineryItem : ContentPage
    {
        List<ListTemplate> viewButtons = new List<ListTemplate>();
        SessionData viewModel;
        public InvMachineryItem ()
        {
            InitializeComponent ();
            viewModel = ViewModelLocator.Session;
            NavigationPage.SetHasNavigationBar(this, false);

            viewButtons.Add(new ListTemplate("view.png", "View", true, true));
            viewButtons.Add(new ListTemplate("edit.png", "Edit", true, true));
            viewButtons.Add(new ListTemplate("AddMaintenance.png", "Add Maintenance", true, true));
        }
    }
}

Answer 1

Currently, InvMachineryItem lives on myCoolApp.Views.Inventory namespace, so the fix is you should change the using statement to using myCoolApp.Views.Inventory .

Second fix, just in case you want your InvMachineryItem to live inside myCoolApp.Views , you need to change the namespace to myCoolApp.Views.Inventory and also update the namespace on your XAML.

The first fix is much easier, you should use it.

Hope it helps!