分页|解决|数据|数据库using System;
using System.Data;
using System.Data.SqlClient;
using System.Web;
using System.Web.UI.WebControls;

namespace OSLeagueForumXP.admin
{
    /// <summary>
    /// 编辑公告页面
    /// </summary>
    public class EditBoardPage : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.HyperLink hlkPrev;
        protected System.Web.UI.WebControls.HyperLink hlkNext;
        protected System.Web.UI.WebControls.HyperLink hlkFirst;
        protected System.Web.UI.WebControls.HyperLink hlkEnd;
        protected System.Web.UI.WebControls.Label lblPage;
        protected System.Web.UI.WebControls.Panel pelMain;
        protected System.Web.UI.WebControls.Label lblMessage;
        protected System.Web.UI.WebControls.HyperLink hlkReturn;
        protected System.Web.UI.WebControls.Panel pelMessage;
        protected System.Web.UI.WebControls.DataList DLBoard;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            Process clsProcess = new Process();
            clsProcess.Common();
            
            const int PAGESIZE = 5;
            int intPageCount;
            int intPage;
            if(Request.QueryString["Page"] == null)
            {
                intPage = 1;
            }
            else
            {
                intPage = Int32.Parse(Request.QueryString["Page"]);
            }
            int intStart = (intPage - 1) * PAGESIZE;
            
            SqlDataReader SqlReader = clsProcess.GetBoardCount();
            if(SqlReader.Read())
            {
                intPageCount = (int)SqlReader["PageCount"];
            }
            else
            {
                intPageCount = 0;
            }
            
            int intAllPage = (int) Math.Floor(intPageCount / PAGESIZE) + 1;
            
            DLBoard.DataSource = clsProcess.GetBoard(intStart,PAGESIZE);
            DLBoard.DataBind();
            
            if(clsProcess.GetBoard(intStart,PAGESIZE).Count == 0)
            {
                lblMessage.Text = "出现错误：<font color=\"red\">没有公告，请先添加公告</font>";
                hlkReturn.Text = "添加公告";
                pelMain.Visible = false;
                pelMessage.Visible = true;
            }
            else
            {
                lblPage.Text = intAllPage.ToString() + "/" + intPage.ToString();
                
                if(intAllPage == 1)
                {
                    hlkFirst.NavigateUrl = "";
                    hlkPrev.NavigateUrl = "";
                    hlkNext.NavigateUrl = "";
                    hlkEnd.NavigateUrl = "";
                }
                else if(intPage == 1)
                {
                    hlkFirst.NavigateUrl = "";
                    hlkPrev.NavigateUrl = "";
                    hlkNext.NavigateUrl = "editboard.aspx?Page=" + (intPage + 1);
                    hlkEnd.NavigateUrl = "editboard.aspx?Page=" + intAllPage;
                }
                else if(intPage == intAllPage)
                {
                    hlkFirst.NavigateUrl = "editboard.aspx?Page=1";
                    hlkPrev.NavigateUrl = "editboard.aspx?Page=" + (intPage - 1);
                    hlkNext.NavigateUrl = "";
                    hlkEnd.NavigateUrl = "";
                }
                else
                {
                    hlkFirst.NavigateUrl = "editboard.aspx?Page=1";
                    hlkPrev.NavigateUrl = "editboard.aspx?Page=" + (intPage - 1);
                    hlkNext.NavigateUrl = "editboard.aspx?Page=" + (intPage + 1);
                    hlkEnd.NavigateUrl = "editboard.aspx?Page=" + intAllPage;
                }
            }
        }

        #region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion
    }
}