BlogEngine.Core.Providers.DbBlogProvider.UpdateCategories C# (CSharp) Method

        private void UpdateCategories(Post post, DbConnectionHelper conn)
        {
            var sqlQuery = string.Format("DELETE FROM {0}PostCategory WHERE BlogID = {1}blogid AND PostID = {1}id", this.tablePrefix, this.parmPrefix);
            using (var cmd = conn.CreateTextCommand(sqlQuery))
            {
                cmd.Parameters.Add(conn.CreateParameter(FormatParamName("blogid"), Blog.CurrentInstance.Id.ToString()));
                cmd.Parameters.Add(conn.CreateParameter(FormatParamName("id"), post.Id.ToString()));

                cmd.ExecuteNonQuery();

                foreach (var cat in post.Categories)
                {
                    cmd.CommandText = string.Format("INSERT INTO {0}PostCategory (BlogID, PostID, CategoryID) VALUES ({1}blogid, {1}id, {1}cat)", this.tablePrefix, this.parmPrefix);
                    cmd.Parameters.Clear();
                    cmd.Parameters.Add(conn.CreateParameter(FormatParamName("blogid"), Blog.CurrentInstance.Id.ToString()));
                    cmd.Parameters.Add(conn.CreateParameter(FormatParamName("id"), post.Id.ToString()));
                    cmd.Parameters.Add(conn.CreateParameter(FormatParamName("cat"), cat.Id.ToString()));

                    cmd.ExecuteNonQuery();
                }
            }
        }