DataList的分页技术_自动测试脚本语言

DataList的分页技术

发表于：2007-06-30来源：作者：点击数：标签：

     由于DataList不支持内建的分页机制，因此，我们必须使用 SqlDataAdapter对象的Fill方法来实现分页，Fill方法主要用来增加或刷新DataSet的记录行。Fill方法已经被重载，我们这里选用四个参数的那个重载方法：DataSet, startRecord, maxRecords 和 TableName。


  <%@ Import NameSpace="System.Data.OleDb" %>
  <%@ Import NameSpace="System.Data" %>
  <HTML>
   <HEAD>
   <script language="<a href="http://dev.21tx.com/language/vb/" target="_blank">VB</a>" runat="server">
   Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
   If Not Page.IsPostBack() Then
   intPageSize.Text = "2"
   intCurrIndex.Text = "0"
   DataBind()
   End If
   End Sub

   Private Sub DataBind()
   Dim CnString As String
   CnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
   CnString = CnString + Server.MapPath("dataDB.mdb"))
   Dim objConn As New OleDbConnection(CnString)
   Dim objDA As New OleDbDataAdapter("SELECT * FROM Document ORDER BY CreateDate DESC", objConn)
   Dim objDS As New DataSet()

   If Not Page.IsPostBack() Then
   objDA.Fill(objDS)
   intRecordCount.Text = CStr(objDS.Tables(0).Rows.Count)
   objDS = Nothing
   objDS = New DataSet()
   End If

   objDA.Fill (objDS, CInt(intCurrIndex.Text), CInt(intPageSize.Text), "Document")

   dList.DataSource = objDS.Tables(0).DefaultView
   dList.DataBind()
   objConn.Close()
   PrintStatus()
   End Sub

   Public Sub ShowFirst(ByVal s As Object, ByVal e As EventArgs)
   intCurrIndex.Text = "0"
   DataBind()
   End Sub


   Public Sub ShowPrevious(ByVal s As Object, ByVal e As EventArgs)
   intCurrIndex.Text = Cstr(Cint(intCurrIndex.Text) - CInt(intPageSize.Text))
   If CInt(intCurrIndex.Text) < 0 Then
   intCurrIndex.Text = "0"
   End If
   DataBind()
   End Sub

   Public Sub ShowNext(ByVal s As Object, ByVal e As EventArgs)
   If CInt(intCurrIndex.Text) + 1 < CInt(intRecordCount.Text) Then
   intCurrIndex.Text = CStr(CInt(intCurrIndex.Text) + CInt(intPageSize.Text))
   End If
   DataBind()
   End Sub

   Public Sub ShowLast(ByVal s As Object, ByVal e As EventArgs)
   Dim tmpInt as Integer

   tmpInt = CInt(intRecordCount.Text) Mod CInt(intPageSize.Text)
   If tmpInt > 0 Then
   intCurrIndex.Text = Cstr(CInt(intRecordCount.Text) - tmpInt)
   Else
   intCurrIndex.Text = Cstr(CInt(intRecordCount.Text) - CInt(intPageSize.Text))
   End If
   DataBind()
   End Sub

   Private Sub PrintStatus()
   lblStatus.Text = "总记录数：<b>" & intRecordCount.Text
   lblStatus.Text += "</b> 当前：<b> "
   lblStatus.Text += CStr(CInt(CInt(intCurrIndex.Text) / CInt(intPageSize.Text)+1))
   lblStatus.Text += "</b>/<b>"

   If (CInt(intRecordCount.Text) Mod CInt(intPageSize.Text)) > 0 Then
   lblStatus.Text += CStr(CInt(CInt(intRecordCount.Text) / CInt(intPageSize.Text)+1))
   Else
   lblStatus.Text += CStr(CInt(intRecordCount.Text) / CInt(intPageSize.Text))
   End If
   lblStatus.Text += "</b>"
   End Sub
   </script>
   </HEAD>
   <body MS_POSITIONING="GridLayout">
  <TABLE height="528" cellSpacing="0" cellPadding="0" width="244" border="0"
  ms_2d_layout="TRUE">
  <TBODY>
  <TR vAlign="top">
  <TD width="244" height="528">
  <form id="Form1" method="post" runat="server">
  <TABLE height="227" cellSpacing="0" cellPadding="0" width="516" border="0"
  ms_2d_layout="TRUE">
  <TR vAlign="top">
  <TD width="10" height="15"></TD>
  <TD width="506"></TD>
  </TR>
  <TR vAlign="top">
  <TD height="48"></TD>
  <TD>
  <h2 align="center"><font face="verdana">Paging in DataList</font></h2>
  </TD>
  </TR>
  <TR vAlign="top">
  <TD height="106"></TD>
  <TD>
  <a name="this"></a>
  </TD>
  </TR>
  <TR vAlign="top">
  <TD height="19"></TD>
  <TD rowSpan="2">
  <table width="505" align="right" height="25">
  <tr>
  <td width="76%" align="left">
   <asp:label ID="lblStatus" Runat="server" Font-Name="verdana" Font-Size="10pt" />
  </td>
  <td width="6%">
   <a href="datalistpaging.aspx#this" ID="hrefFirst" onserverclick="ShowFirst" runat="server">
   <b><<</b></a>
  </td>
  <td width="6%">
   <a href="datalistpaging.aspx#this" ID="hrefPrevious"
   onserverclick="ShowPrevious" runat="server">
   <b><</b></a>
  </td>
  <td width="6%">
   <a href="datalistpaging.aspx#this" ID="hrefNext" onserverclick="ShowNext" runat="server">
   <b>></b></a>
  </td>
  <td width="6%">
   <a href="datalistpaging.aspx#this" ID="hrefLast" onserverclick="ShowLast" runat="server">
   <b>>></b></a>
  </td>
  </tr>
  </table>
  </TD>
  </TR>
  <TR vAlign="top">
  <TD height="19"></TD>
  <TD>
  <asp:label ID="intPageSize" Visible="False" Runat="server" /></TD>
  </TR>
  <TR vAlign="top">
  <TD height="20"></TD>
  <TD>
  <asp:label ID="intRecordCount" Visible="False" Runat="server" /></TD>
  </TR>
  <asp:DataList ID="dList" Runat="server" Width="100%"
  ItemStyle-BackColor="Beige" ItemStyle-Font-Name="宋体"
  BorderWidth="1" HeaderStyle-Font-Name="Verdana" EnableViewState="False">
  <HeaderTemplate>
  <table width="100%" style="font: 10pt verdana" cellpadding="0" cellspacing="0">
  <tr style="background-color:FF0000">
  <th align="left">
   <font color="#FFFFFF">Store ID</font></th>
  <th align="left">
   <font color="#FFFFFF">Order Number</font></th>
  <th align="left">
   <font color="#FFFFFF">Order Date</font></th>
  <th align="left">
   <font color="#FFFFFF">Qty</font></th>
  <th align="left">
   <font color="#FFFFFF">Title ID</font></th>
  </tr>
  </HeaderTemplate>
  <ItemTemplate>
  <tr style="background-color:#f5f5dc">
  <td><%# DataBinder.Eval(Container.DataItem, "id") %></td>
  <td><%# DataBinder.Eval(Container.DataItem, "Title") %></td>
  <td><%# DataBinder.Eval(Container.DataItem, "Author") %></td>
  <td><%# DataBinder.Eval(Container.DataItem, "Source") %></td>
  <td><%# DataBinder.Eval(Container.DataItem, "CreateDate") %></td>
  </tr>
  </ItemTemplate>
  <FooterTemplate>
  </TABLE>
  </FooterTemplate>
  </asp:DataList>
  <asp:label ID="intCurrIndex" Visible="False" Runat="server" />
  </TABLE>
  </FORM>
  </TD></TR>
  </TBODY>
  </TABLE>
  </body>
  </HTML>


  为了避免大量记录造成的网络阻塞，可以用存储过程。

原文转自：http://www.ltesting.net

软件测试 > 测试开发技术 > 软件测试开发语言 > 自动测试脚本语言 >