private void CatDelete_Click(object sender, RoutedEventArgs e) { dataAccess data = new dataAccess(); categories cat = new categories(); if (CategoryNumber.Text == "") { MessageBox.Show("Category ID field is Empty ,Enter The ID"); } else { cat.CategoryID = int.Parse(CategoryNumber.Text); cat.CategoryName = CategoryName.Text; data.deleteCat(cat); MessageBox.Show("Category " + cat.CategoryName + " Has been removed successfully"); } }