GridView分页

在用GridView里自带的分功能的时候，出现在一个有点奇怪的问题，点下面的页码，会执行上面按钮扭执行的动作，所以就用了一个自定义分页的功能。现将功能描述如下：

aspx页代码：

<%@ Page Language="VB" MasterPageFile="~/products.master" EnableEventValidation="false" AutoEventWireup="false" CodeFile="more_newproducts.aspx.vb" Inherits="more_newproducts" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">

<tr>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

DataKeyNames="productid" GridLines="Horizontal"

Width="576px" Font-Size="13px" HorizontalAlign="Center" CellPadding="0" AllowPaging="True">

<asp:TemplateField>

<asp:Image ID="Image1" runat="server" Height="80px" ImageUrl='<%# "~/upload/"+Eval("s_imgurl") %>'

Width="80px" BorderColor="Silver" BorderStyle="Double" BorderWidth="3px" />

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="productid" InsertVisible="False" SortExpression="productid" Visible="False">

<asp:Label ID="lblproid" runat="server" Text='<%# Bind("productid") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="productname" SortExpression="productname" Visible="False">

<asp:Label ID="lblproname" runat="server" Text='<%# Bind("productname") %>'></asp:Label>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="物品名称">

<asp:HyperLink ID="HyperLink1" runat="server" Font-Underline="False" NavigateUrl='<%# Eval("productid", "productdetailsinfo.aspx?productid={0}") %>'

Text='<%# Eval("productname") %>'></asp:HyperLink>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField DataField="pifajia" HeaderText="价格" SortExpression="pifajia" >

</asp:BoundField>

<asp:BoundField DataField="pinpai" HeaderText="品牌" SortExpression="pinpai" >

</asp:BoundField>

<asp:BoundField DataField="changdi" HeaderText="产地" SortExpression="changdi" >

</asp:BoundField>

<asp:TemplateField>

<asp:Button ID="cart" runat="server" CommandName="cart" Text="buy" Width="40px" />

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField>

<asp:Button ID="favorite" runat="server" CommandName="favorite" Text="收藏" Width="40px" />

</ItemTemplate>

</asp:TemplateField>

</Columns>

</asp:GridView>

</td>

</tr>

<tr>

<asp:LinkButton ID="btnFirst" CommandArgument="first" OnClick="PagerButtonClick" runat="server">首页</asp:LinkButton>

<asp:LinkButton ID="btnPrev" CommandArgument="prev" OnClick="PagerButtonClick" runat="server">上一页</asp:LinkButton>

<asp:LinkButton ID="btnNext" CommandArgument="next" OnClick="PagerButtonClick" runat="server">下一页</asp:LinkButton>

<asp:LinkButton ID="btnLast" CommandArgument="last" OnClick="PagerButtonClick" runat="server">尾页</asp:LinkButton>

<asp:Label ID="LblCurrentIndex" runat="server"></asp:Label>

<asp:Label ID="LblPageCount" runat="server"></asp:Label>

<asp:Label ID="LblRecordCount" runat="server"></asp:Label>

<asp:Label ID="LblNoRecord" runat="server" Text="记录为零" Visible="False"></asp:Label>

</td>

</tr>

</table>

</asp:Content>

aspx.vb代码：

Imports System.Data

Imports System.Data.SqlClient

Partial Class more_newproducts

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

GridViewBind()

End Sub

Protected Sub PagerButtonClick(ByVal sender As Object, ByVal e As EventArgs)

Dim arg As String = (CType(sender, LinkButton)).CommandArgument.ToString()

Select Case arg

Case "prev"

If (GridView1.PageIndex > 0) Then

GridView1.PageIndex -= 1

End If

Case "next"

If (GridView1.PageIndex < (GridView1.PageCount - 1)) Then

GridView1.PageIndex += 1

End If

Case "last"

GridView1.PageIndex = (GridView1.PageCount - 1)

Case "first"

GridView1.PageIndex = 0

End Select

GridViewBind()

End Sub

Private Sub GridViewBind()

Dim conn As New SqlConnection

conn.ConnectionString = Application("conn")

conn.Open()

Dim sql As String = "SELECT [productid], [productname], [pifajia], [price], [s_imgurl], [pinpai], [changdi] FROM [products] ORDER BY [fabushijian] DESC"

Dim dt As DataSet = New DataSet

Dim da As SqlDataAdapter = New SqlDataAdapter(sql, conn)

da.Fill(dt)

GridView1.DataSource = dt.Tables(0).DefaultView

GridView1.DataBind()

LblCurrentIndex.Text = "第<font color='red'>" + (GridView1.PageIndex + 1).ToString() + "</font> 页"

LblPageCount.Text = "共<font color='red'> " + GridView1.PageCount.ToString() + "</font> 页"

LblRecordCount.Text = "总共<font color='red'> " + dt.Tables(0).Rows.Count.ToString() + "</font> 条"

If (dt.Tables(0).Rows.Count = 0) Then

btnFirst.Visible = False

btnPrev.Visible = False

btnNext.Visible = False

btnLast.Visible = False

LblCurrentIndex.Visible = False

LblPageCount.Visible = False

LblRecordCount.Visible = False

LblNoRecord.Visible = True

ElseIf (GridView1.PageCount = 1) Then

btnFirst.Visible = False

btnPrev.Visible = False

btnNext.Visible = False

btnLast.Visible = False

End If

End Sub

End Class