DataList分页

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.NET 专题-数据控件-DataList/Repeater

ASP ASP.net Microsoft C C++

<% @ Page Language="C#" %>
<% @ Import Namespace="System.Data" %>
<% @ Import Namespace="System.Data.OleDb" %>
<Script Language="C#" Runat="Server">
/*
   Create By 飞刀
   http://www.aspcn.com
   2001-7-25 01:44

   Support .Net Framework Beta 2
*/
OleDbConnection MyConn;
int PageSize,RecordCount,PageCount,CurrentPage;
public void Page_Load(Object src,EventArgs e)
{
   //设定PageSize
   PageSize = 10;

   //连接语句
   string MyConnString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath(".")+"..\\DataBase\\db1.mdb;";
   MyConn = new OleDbConnection(MyConnString);
   MyConn.Open();

   //第一次请求执行
   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 Score";
   OleDbCommand MyComm = new OleDbCommand(strCount,MyConn);
   OleDbDataReader 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 Score";
   DataSet ds = new DataSet();

   OleDbDataAdapter MyAdapter = new OleDbDataAdapter(strSel,MyConn);
   MyAdapter.Fill(ds,StartIndex,PageSize,"Score");

   return ds.Tables["Score"].DefaultView;
}
public void ListBind()
{
   score.DataSource = CreateSource();
   score.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(CurrentPage<(PageCount-1)) CurrentPage++;
   break;
   case "prev":
   if(CurrentPage>0) CurrentPage--;
   break;
   }

   ViewState["PageIndex"] = CurrentPage;

   ListBind();

}
</script>
<html>
<head>
<title></title>
</head>
<body>
<form runat="server">
共有<asp:Label id="lblRecordCount" ForeColor="red" runat="server" />条记录
当前为<asp:Label id="lblCurrentPage" ForeColor="red" runat="server" />/<asp:Label id="lblPageCount" ForeColor="red" runat="server" />页

<asp:DataList id="score" runat="server"
HeaderStyle-BackColor="#aaaadd"
AlternatingItemStyle-BackColor="Gainsboro"
EditItemStyle-BackColor="yellow"
>
   <ItemTemplate>
   姓名：<%# DataBinder.Eval(Container.DataItem,"Name") %>
   <asp:LinkButton id="btnSelect" Text="编辑" CommandName="edit" runat="server" />
   </ItemTemplate>
</asp:DataList>
<asp:LinkButton id="lbnPrevPage" Text="上一页" CommandName="prev" OnCommand="Page_OnClick" runat="server" />
<asp:LinkButton id="lbnNextPage" Text="下一页" CommandName="next" OnCommand="Page_OnClick" runat="server" />

</form>
</body>
</html>

用viewstate传递分页的信息，最重要的就是这一句   MyAdapter.Fill(ds,StartIndex,PageSize,"Score");
================================================================================
DataList分页2
Repeater和DataList控件提供了一个快速、灵活的表现数据的方式，但是，它们没有内建的分页功能；DataGrid控件提供了内建的分页功能，但它的结构比较复杂。下面就用PagedDataSource类实现Repeater和DataList的分页。 PagedDataSource封装了DataGrid的分页属性，我们可以象DataGrid那样进行分页。代码如下：
 
<%@ Page Language="C#" %>
<%@ import namespace="System.Data" %>
<%@ import namespace="System.Data.OleDb" %>
<script language="C#" runat="server">
public void Page_Load(Object src,EventArgs e) {
OleDbConnection objConn=new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" +
   Server.MapPath("../aspxWeb.mdb"));
OleDbDataAdapter objCommand=new OleDbDataAdapter("select * from Document",objConn);
DataSet ds=new DataSet();
objCommand.Fill(ds);
PagedDataSource objPds = new PagedDataSource();
objPds.DataSource = ds.Tables[0].DefaultView;
objPds.AllowPaging = true;
objPds.PageSize = 5;
int CurPage;
if (Request.QueryString["Page"] != null)
    CurPage=Convert.ToInt32(Request.QueryString["Page"]);
else
    CurPage=1;

objPds.CurrentPageIndex = CurPage-1;
lblCurrentPage.Text = "当前页：" + CurPage.ToString();

if (!objPds.IsFirstPage)
lnkPrev.NavigateUrl=Request.CurrentExecutionFilePath + "?Page=" + Convert.ToString(CurPage-1);

if (!objPds.IsLastPage)
lnkNext.NavigateUrl=Request.CurrentExecutionFilePath+ "?Page=" + Convert.ToString(CurPage+1);

Repeater1.DataSource=objPds;
Repeater1.DataBind();
}
</script>
<html>
<head>
<title>Repeater控件分页的例子</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style>
P,TD,DIV,SPAN {font-size:9pt}
</style>
</head>
<body>
<form name="form1" method="POST" runat="server">
<div style="padding:5px;background-color:#dedede">
<asp:label ID="lblCurrentPage" runat="server"></asp:label></td>
<td> <asp:HyperLink id="lnkPrev" runat="server">上一页</asp:HyperLink>
<asp:HyperLink id="lnkNext" runat="server">下一页</asp:HyperLink> 
</div>
<hr size="1" color="#000099"/>
<asp:Repeater ID="Repeater1" runat="server">
<Itemtemplate>
<div style="padding:5px;background-color:#dedede">
<%# DataBinder.Eval(Container.DataItem, "Title") %>
</div>
</Itemtemplate>
</asp:Repeater>
</form>
</body>
</html>