Prism/e2e/Wpf/HelloWorld/Dialogs/DialogViewModelBase.cs

using Prism.Commands;
using Prism.Mvvm;
using Prism.Dialogs;
using System;

namespace HelloWorld.Dialogs
{
    public class DialogViewModelBase : BindableBase, IDialogAware
    {
        private DelegateCommand<string> _closeDialogCommand;
        public DelegateCommand<string> CloseDialogCommand =>
            _closeDialogCommand ?? (_closeDialogCommand = new DelegateCommand<string>(CloseDialog));

        private string _title;
        public string Title
        {
            get { return _title; }
            set { SetProperty(ref _title, value); }
        }

        public DialogCloseListener RequestClose { get; }

        protected virtual void CloseDialog(string parameter)
        {
            var result = parameter?.ToLower() switch
            {
                "true" => ButtonResult.OK,
                "false" => ButtonResult.Cancel,
                _ => ButtonResult.None
            };

            //RequestClose.Invoke(new DialogResult(result));
            RequestClose.Invoke(result);
        }

        public virtual bool CanCloseDialog()
        {
            return true;
        }

        public virtual void OnDialogClosed()
        {

        }

        public virtual void OnDialogOpened(IDialogParameters parameters)
        {

        }
    }
}