private void btn_Save_Click(object sender, EventArgs e)
        {
            if (lv_ArticleTitleList.CheckedItems.Count<=0)
            {
                MessageBox.Show("没有勾选需要的文章,请勾选");
                return;
            }

            using (ArticleDAL dal = new ArticleDAL ())
            {
                for (int i = 0; i < lv_ArticleTitleList.CheckedItems.Count; i++)
                {
                    Article article =
                        articleList.Where(
                            a => a.ID == Guid.Parse(
                                lv_ArticleTitleList.CheckedItems[i].Name
                                )).FirstOrDefault();

                    using (PicProcess pic = new PicProcess ())
                    {
                        if (pic.Process(article))
                        {
                            dal.AddArticle(article);
                        }
                        else
                        {
                            MessageBox.Show("上传失败");
                            return;
                        }
                    }
                }
            }
            mainForm.Bind();
            MessageBox.Show("保存成功!");
        }