/// <summary>
        /// 判断翻页按钮
        /// </summary>
        /// <param name="startpage">首页</param>
        /// <param name="uppage">上一页</param>
        /// <param name="downpage">下一页</param>
        /// <param name="lastpage">最后一页</param>
        /// <param name="CurrentPage">当前页</param>
        ///<param name="Pages">总页数</param>
        public void PageButton(Button startPage, Button upPage, Button downPage, Button lastPage, int CurrentPage, int pages)
        {
            if (CurrentPage > 1)
            {
                startPage.Enabled = true;
                upPage.Enabled = true;
            }
            else
            {
                startPage.Enabled = false;
                upPage.Enabled = false;
            }
            if (CurrentPage == pages)
            {
                downPage.Enabled = false;
                lastPage.Enabled = false;
            }
            else
            {
                downPage.Enabled = true;
                lastPage.Enabled = true;
            }
        }