How to access properties of generic base class's parameter in C#?

Question

I have a common class PopupDialog which has properties such as bool IsBackDismissEnabled . This is used to denote whether pressing back button will dismiss the dialog.

I am using Xamarin.CommunityToolkit Popup for showing a popup dialog.

Here's my PopupDialog.cs

public class PopupDialog
{
    public bool IsBackDismissEnabled { get; set; }
}

Here's my Dialog Implementation

using Xamarin.CommunityToolkit.UI.Views;

[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class ForgotPasswordDialog : Popup<PopupDialog>
{
    public ForgotPasswordDialog()
    {
        InitializeComponent();

        // I want to access IsBackDismissEnabled here
        // something like base.IsBackDismissEnabled = true;
    }
}

I want to access PopupDialog 's IsBackDismissEnabled from the derived class of Popup<PopupDialog> how can it be done?

In short, I have a class which is specified as a parameter to a generic class. And that generic class is derived in a class from which I want to access properties of previous class that is specified as a parameter to the generic class.

Answer 1

I've never seen anyone attempt to do what you are attempting. I'm not even sure it makes logical sense. Please explain what you are trying to do: Why do you want PopupDialog to be a generic parameter ?

Consider making it a parameter on Popup 's constructor, and save it in a property or field:

public class Popup
{
    public Popup(ISomeInterface myParam)
    {
        this.MyParam = myParam;
    }

    public ISomeInterface MyParam;
}

public class ForgotPasswordDialog : Popup
{
    public ForgotPasswordDialog() : base(new PopupDialog())
    {
    }

    void SomeMethod()
    {
        // Access MyParam
        ... this.MyParam.IsBackDismissEnabled ...
    }
}

public interface ISomeInterface
{
    bool IsBackDismissEnabled { get; set; }
}

public class PopupDialog : ISomeInterface
{
    public bool IsBackDismissEnabled { get; set; }
    ...
}

/// Usage
var myVariable = new ForgotPasswordDialog();
... myVariable.MyParam.IsBackDismissEnabled ...

To be useful, you'll want to specify an interface or base class that MyParam has. Here I show ISomeInterface . This might instead be some base class of PopupDialog .