DataSource Controls :: Retrieve Total # Of Rows By Using SqlDataSource Calling A SP?

I am trying to retrieve the number of rows from a stored procedure. I was trying to use @rowCount as an output parameter in my stored procedure but every time I use that SqlDataSource1 won't retrive me any data. Once I removed @rowCount from my SP I get all the data but don't know how to retrieve the Total number of rows :(

I was trying to do this:

protected
void SqlDataSource1_Selected(object sender,
SqlDataSourceStatusEventArgs e)
{
// lblTotalRows.Text = (string)e.Command.Parameters["@rowCount"].Value;
}