How to get the DeleteParameter value in to the Code behind?

How to get the DeleteParameter value in to the Code behind?

I have a ListView that enables deleting, I also use SQLDatasource as
DataSource of the ListView, I have these 2 tables:
News table that contains news_id, title, etc.. and
Feedback table that contains feedback_id, comment, news_id(FK), etc...
I can delete a record that doesn't have comments but I get this error when
I try to delete a News that has a comments, the comments is from the table
'Feedback' that has a foreign key 'news_id' from the table 'News', I know
that to resolve this is I need to delete the records from the Feedback
table first. How can I achieve it? I'm thinking of using OnItemDeleting
Event in ListView and execute a query:
DELETE FROM Feedback WHERE news_id = @news_id
and then it can proceed to execute the DeleteCommand in the SQLDataSource
that is:
DeleteCommand="DELETE FROM [News] WHERE [news_id] = @news_id"
but then I got this error:
Must declare the scalar variable "@news_id".
this is my DeleteParameter:
<DeleteParameters>
<asp:Parameter Name="news_id" Type="Int32" />
</DeleteParameters>
how can i get the news_id from the DeleteParameter? any answer is
appreciated, thanks.