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ASP.NET程序中用Repeater实现分页

  • 时间:2020-04-28 09:57 编辑: 来源: 阅读:
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摘要:ASP.NET程序中用Repeater实现分页
[b]一、程序功能:[/b]   为Repeater实现分页      [b]二、窗体设计:[/b]   1、新建ASP.NET Web应用程序,命名为Repeater2,保存路径为http://192.168.0.1/Repeater2(注:我机子上的网站的IP是192.168.0.1的主目录是D:\web文件夹)然后点击确定。      2、向窗体添加一个3行一列的表,向表的第一行中添加一个Repeater控件,向表的第二行中添加两个Label控件向表的第三行中添加四个Button按钮。      3、切换到HTML代码窗口,在<asp:Repeater id="Repeater1" runat="server">和</asp:Repeater>之间添加以下代码:      <ItemTemplate>   <table id="Table2" style="FONT-SIZE: x-small" width="498">   <tr>   <td><%#DataBinder.Eval(Container,"DataItem.employeeid")%></td>   <td><%#DataBinder.Eval(Container,"DataItem.lastname")%></td>   </tr>   </table>   </ItemTemplate>      [b]三、代码设计:[/b]   Imports System.Data.SqlClient   Public Class WebForm1   Inherits System.Web.UI.Page      Dim scon As New SqlConnection("server=localhost;database=northwind;uid=sa;pwd=123")   Dim sDA As SqlDataAdapter   Dim ds As DataSet   Dim currentPage As Integer '记录着目前在哪一页上   Dim maxPage As Integer '总共有多少页   Const rowCount As Integer = 3 '一页有多少行   Dim rowSum As Integer '总共有多少行      '窗体代码省略      Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load      If Not Page.IsPostBack Then   sDA = New SqlDataAdapter("select employeeid, lastname from employees order by employeeid", scon)   ds = New DataSet   Try   sDA.Fill(ds, "employees")   '获取总共有多少行   rowSum = ds.Tables(0).Rows.Count   Catch ex As Exception   rowSum = 0   End Try      '如果没有数据,退出过程   If rowSum = 0 Then Exit Sub   '计算出浏览数据的总页数   If rowSum Mod rowCount > 0 Then   '有余数要加1   maxPage = rowSum \ rowCount + 1   Else   '正好除尽   maxPage = rowSum \ rowCount   End If      currentPage = 1   '调用绑定数据过程   readpage(currentPage)   BindData()   Label2.Text = maxPage   '首页和上一页按钮不可见   Button1.Visible = False   Button2.Visible = False   End If   End Sub      '创建一个绑定数据的过程   Sub BindData()   Repeater1.DataSource = ds   Repeater1.DataBind()   Label1.Text = currentPage   End Sub      '创建一个填充数据集的过程   Sub readpage(ByVal n As Integer)   sDA = New SqlDataAdapter("select employeeid, lastname from employees order by employeeid", scon)   ds = New DataSet   ds.Clear()   sDA.Fill(ds, (n - 1) * rowCount, rowCount, "employees")   End Sub      '首页按钮   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click      currentPage = 1   '调用填充数据集过程   readpage(currentPage)   '绑定数据   BindData()   '设置首页、第一页按钮不可见,显示下一页尾页按钮   Button1.Visible = False   Button2.Visible = False   Button3.Visible = True   Button4.Visible = True      End Sub      '上一页按钮   Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click   '如果现在页是第二页,设置首页和上一页按钮不可见   If Label1.Text > 2 Then   Button3.Visible = True   Button4.Visible = True   Else   Button1.Visible = False   Button2.Visible = False   Button3.Visible = True   Button4.Visible = True   End If   currentPage = Label1.Text - 1   readpage(currentPage)   BindData()   End Sub      '下一页按钮   Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click   '如果现在页倒数第二页,设置最后页和下一页按钮不可见   If Label1.Text < Label2.Text - 1 Then   Button1.Visible = True   Button2.Visible = True   Else   Button1.Visible = True   Button2.Visible = True   Button3.Visible = False   Button4.Visible = False   End If   currentPage = Label1.Text + 1   readpage(currentPage)   BindData()   End Sub      '尾页按钮   Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click   '设置当前页为最大页数   currentPage = Label2.Text   readpage(currentPage)   BindData()   Button1.Visible = True   Button2.Visible = True   Button3.Visible = False   Button4.Visible = False   End Sub   End Class      窗体界面如下所示:    [center][img]http://files.jb51.net/upload/200610111472242.gif[/img] [/center]
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