ASP.NET程序中用Repeater实现分页
2024-07-10 12:40:32
供稿:网友
一、程序功能:
为Repeater实现分页
二、窗体设计:
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>
三、代码设计:
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)