protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            (Master.FindControl("masterTextBox") as TextBox).Visible = false;
            (Master.FindControl("masterLabel") as Label).Visible     = false;
            (Master.FindControl("masterButton") as Button).Visible   = false;

            if (Request.QueryString["page_request"] != null && Request.QueryString["search_type"] != null && Request.QueryString["search_content"] != null)
            {
                string str = Request.QueryString["search_content"];
                if (str.Equals(String.Empty))
                {
                    this.showFalseMessage("输入内容不能为空!");
                    return;
                }
                if (str.Length < minSearchSize)
                {
                    this.showFalseMessage("输入内容太短!");
                    return;
                }
                if (str.Length > maxSearchSize)
                {
                    this.showFalseMessage("输入内容太长!");
                    return;
                }
                TextBox1.Text = str;

                string pageRequestedString = Request.QueryString["page_request"];
                if (pageRequestedString.Equals(String.Empty))
                {
                    this.showFalseMessage("页码输入不正确!");
                    return;
                }
                int pageRequested = Int32.Parse(pageRequestedString);
                if (pageRequested < 1)
                {
                    this.showFalseMessage("页码输入不正确!");
                    return;
                }

                SearchType type = (SearchType)Int32.Parse(Request.QueryString["search_type"]);
                DropDownList1.SelectedIndex = (int)type;

                NewsDAO dao      = new NewsDAO();
                int     pageSize = 0;
                DataSet ds       = new DataSet();
                switch (type)
                {
                case SearchType.Article:
                    pageSize = dao.GetNewsSizeByArticle(str, pageDefaultSize);
                    ds       = dao.SearchNewsByArticle(str, pageDefaultSize, pageRequested);
                    initList(ds, pageSize);
                    break;

                case SearchType.Title:
                    pageSize = dao.GetNewsSizeByTitle(str, pageDefaultSize);
                    ds       = dao.SearchNewsByTitle(str, pageDefaultSize, pageRequested);
                    initList(ds, pageSize);
                    break;

                case SearchType.TitleAndArticle:
                    pageSize = dao.GetNewsSizeByTitleAndArticle(str, pageDefaultSize);
                    ds       = dao.SearchNewsByTitleAndArticle(str, pageDefaultSize, pageRequested);
                    initList(ds, pageSize);
                    break;
                }
            }
        }
    }