.net分页源码示例

2022-07-15 80酷酷网 80kuku.com

　　分页|示例<% Page Language="C#" %>
<% Import Namespace="System.Data" %>
<% Import Namespace="System.Data.SqlClient" %>
<Script Language="C#" Runat="Server">
SqlConnection MyConn;
int PageSize,RecordCount,PageCount,CurrentPage;
public void Page_Load(Object src,EventArgs e)
{
//设定PageSize
PageSize = 5;

//连接语句
string MyConnString = "server=127.0.0.1;database=example;uid=sa;pwd=1234567";
MyConn = new SqlConnection(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 TABLE1";
SqlCommand MyComm = new SqlCommand(strCount,MyConn);
SqlDataReader dr = MyComm.ExecuteReader();
if(dr.Read())
{
  //intCount = Int32.Parse(dr["co"].ToString());
  intCount=(int)dr["co"];
}
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 TABLE1";
DataSet ds = new DataSet();

SqlDataAdapter MyAdapter = new SqlDataAdapter(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,"title") %>
<asp:LinkButton id="btnSelect" Text="编辑" CommandName="edit" runat="server" />
</ItemTemplate>
</asp:DataList>
共<%=PageCount%>页
<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>