datalist控件实现分页功能
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DataList控件实现分页功能...
DataList控件其实功能也很强大,不过最令人头疼的就是它不像GridView控件一样内置了分页的功能,这么好的一个控件竟然不能分页,不过,只是DataList没有提供内置的分页功能,但是并不表示,我们不能使用DataList控件来实现分页,既然它不给我分页功能,那只好自己动手了。下面是全部原代码,这里用的是DataAdapter与DataSet 组合。
<% @ Page Language="C#" %>
<% @ Import Namespace="System.Data" %>
<% @ Import Namespace="System.Data.OleDb" %> <Script Language="C#" Runat="Server"> 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 = mandName;
//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"