DataList 能否分页,请问如何实现?

2023-07-06   


private void Page_Load(object sender, System.EventArgs e)
  
   PageSize=1;
   Conn= new SqlConnection(Application["Guest_Conn"].ToString());
   Conn.Open();
   if(!Page.IsPostBack)
  
   ListBind();
   CurrentPage = 0;
   ViewState["PageIndex"] = 0;
   //计算总共有多少记录
   RecordCount = CalculateRecord();
   lblRecordCount.Text = RecordCount.ToString();
   //计算总共有多少页
   PageCount = RecordCount/PageSize;
   lblPageCount.Text = PageCount.ToString();
   ViewState["PageCount"] = PageCount;
  
  
  
   //计算总共有多少条记录
   public int CalculateRecord()
  
   int intCount;
   string strCount = “select count(*) as co from guest”;
   SqlCommand MyComm = new SqlCommand (strCount,Conn);
   SqlDataReader dr = MyComm.ExecuteReader();
   if(dr.Read())
  
   intCount = Int32.Parse(dr["co"].ToString());
  
   else
  
   intCount = 0;
  
   dr.Close();
   return intCount;
  
  
   ICollection CreateSource()
  
   int StartIndex;
   //设定导入的起终地址
   StartIndex = CurrentPage*PageSize;
   string strSel = “Select * from guest order by postdate desc”;
   DataSet ds = new DataSet();
   SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel,Conn);
   MyAdapter.Fill(ds,StartIndex,PageSize,”guest”);
   return ds.Tables["guest"].DefaultView;
  
  
   public void ListBind()
  
   Myguest.DataSource = CreateSource();
   Myguest.DataBind();
   lbnNextPage.Enabled = true;
   lbnPrevPage.Enabled = true;
   if(CurrentPage==(PageCount-1)) lbnNextPage.Enabled = false;
   if(CurrentPage==0) lbnPrevPage.Enabled = false;
   lblCurrentPage.Text = (CurrentPage+1).ToString();
  
  
   public void Page_OnClick(Object sender,CommandEventArgs e)
  
   CurrentPage = (int)ViewState["PageIndex"];
   PageCount = (int)ViewState["PageCount"];
   string cmd = e.CommandName;
   //判断cmd,以判定翻页方向
   switch(cmd)
  
   case “next”:
   if(CurrentPage0) CurrentPage–;
   break;
  
   ViewState["PageIndex"] = CurrentPage;
   ListBind();
  


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