Subtext.Framework.XmlRpc.MetaWeblog.SetPostCategories C# (CSharp) Method

        public bool SetPostCategories(string postid, string username, string password,
            MtCategory[] categories)
        {
            ValidateUser(username,password,Config.CurrentBlog.AllowServiceAccess);

            if (categories != null && categories.Length > 0)
            {
                int postID = Int32.Parse(postid);

                ArrayList al = new ArrayList();

                for (int i = 0; i < categories.Length; i++)
                {
                        al.Add(Int32.Parse(categories[i].categoryId));
                }

                if(al.Count > 0)
                {
                    Entries.SetEntryCategoryList(postID,(int[])al.ToArray(typeof(int)));
                }
            }

            return true;
        }