private void AddCategoryCommandExecute(object obj)
        {
            CategoryWindow window = container.Resolve <CategoryWindow>(new ResolverOverride[]
            {
                new ParameterOverride("actionCode", 1)
            });

            window.Owner = (obj as Window);
            bool result = (bool)window.ShowDialog();

            if (result)
            {
                var category = (window.DataContext as CategoryWindowViewModel).DataFormCategory;
                DataFormCategories.Add(category);
            }
        }
        private void RemoveCategoryCommandExecute(object obj)
        {
            CategoryWindow window = container.Resolve <CategoryWindow>(new ResolverOverride[]
            {
                new ParameterOverride("actionCode", 3)
            });

            window.Owner = (obj as Window);
            bool result = (bool)window.ShowDialog();

            if (result)
            {
                var removedCategory = (window.DataContext as CategoryWindowViewModel).DataFormCategory;
                var current         = DataFormCategories.Where(s => s.CategoryId == removedCategory.CategoryId).FirstOrDefault();
                if (current != null)
                {
                    DataFormCategories.Remove(current);
                }
            }
        }
        private void UpdateCategoryCommandExecute(object obj)
        {
            CategoryWindow window = container.Resolve <CategoryWindow>(new ResolverOverride[]
            {
                new ParameterOverride("actionCode", 2)
            });

            window.Owner = (obj as Window);
            bool result = (bool)window.ShowDialog();

            if (result)
            {
                var update  = (window.DataContext as CategoryWindowViewModel).DataFormCategory;
                var current = DataFormCategories.Where(s => s.CategoryId == update.CategoryId).FirstOrDefault();
                if (current != null)
                {
                    current.CategoryName = update.CategoryName;
                    current.Description  = update.Description;
                }
            }
        }