分享
 
 
 

DataGrid和存储过程结合的分页,只读取当前页数据

王朝asp·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

<%@ Import Namespace="System.Data.SqlClient" %>

<%@ Import Namespace="System.Data" %>

<Script Runat="Server">

Dim conNorthwind As SqlConnection

Dim strSelect As String

Dim intStartIndex As Integer

Dim intEndIndex As Integer

Sub Page_Load

Dim cmdSelect As SqlCommand

btnFirst.Text = "首页"

btnPrev.Text = "上一页"

btnNext.Text = "下一页"

btnLast.Text = "末页"

conNorthwind = New SqlConnection( "Server=192.168.4.1;UID=sa;PWD=XXXXXX;Database=NorthWind" )

If Not IsPostBack Then

' Get Total Pages

strSelect = "SELECT COUNT(OrderID) FROM Orders"

cmdSelect = New SqlCommand( strSelect, conNorthwind )

conNorthwind.Open()

dgrdProducts.VirtualItemCount = (cmdSelect.ExecuteScalar() / dgrdProducts.PageSize)

conNorthwind.Close()

BindDataGrid

End If

End Sub

Sub BindDataGrid

Dim dadProducts As SqlDataAdapter

Dim dstProducts As DataSet

intEndIndex = dgrdProducts.PageSize

dadProducts = New SqlDataAdapter( "OrdersPaged", conNorthwind )

dadProducts.SelectCommand.CommandType = CommandType.StoredProcedure

dadProducts.SelectCommand.Parameters.Add( "@PageIndex", intStartIndex )

dadProducts.SelectCommand.Parameters.Add( "@PageSize ", intEndIndex )

dstProducts = New DataSet

dadProducts.Fill( dstProducts )

dgrdProducts.DataSource = dstProducts

dgrdProducts.DataBind()

End Sub

Sub dgrdProducts_PageIndexChanged( s As Object, e As DataGridPageChangedEventArgs )

intStartIndex = e.NewPageIndex

dgrdProducts.CurrentPageIndex = e.NewPageIndex

BindDataGrid

End Sub

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

Dim arg As String = sender.CommandArgument

Select Case arg

Case "next"

If (dgrdProducts.CurrentPageIndex < (dgrdProducts.PageCount - 1)) Then

dgrdProducts.CurrentPageIndex += 1

End If

Case "prev"

If (dgrdProducts.CurrentPageIndex > 0) Then

dgrdProducts.CurrentPageIndex -= 1

End If

Case "last"

dgrdProducts.CurrentPageIndex = (dgrdProducts.PageCount - 1)

Case Else

'page number

dgrdProducts.CurrentPageIndex = System.Convert.ToInt32(arg)

End Select

intStartIndex=dgrdProducts.CurrentPageIndex

BindDataGrid

End Sub

</Script>

<html>

<head><title>Paging.aspx</title></head>

<body>

<form Runat="Server">

<asp:DataGrid Runat="Server"

ID="dgrdProducts"

showheader="false"

AllowPaging="True"

AllowCustomPaging="True"

PageSize="10"

OnPageIndexChanged="dgrdProducts_PageIndexChanged"

PagerStyle-Mode="NumericPages"

AlternatingItemStyle-BackColor="#eeaaee"

HeaderStyle-BackColor="#aaFFdd"

Font-Size="10pt"

Font-Name="Verdana"

CellSpacing="0"

CellPadding="3"

GridLines="Both"

BorderWidth="1"

BorderColor="black"

PagerStyle-HorizontalAlign="Right">

<AlternatingItemStyle BackColor="#EEEEEE"></AlternatingItemStyle>

</asp:datagrid>

<asp:linkbutton id="btnFirst" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="0"></asp:linkbutton>&nbsp;

<asp:linkbutton id="btnPrev" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="prev"></asp:linkbutton>&nbsp;

<asp:linkbutton id="btnNext" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="next"></asp:linkbutton>&nbsp;

<asp:linkbutton id="btnLast" onclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt" ForeColor="navy" CommandArgument="last"></asp:linkbutton>

</form>

</html>

下面是存储过程:

CREATE PROCEDURE OrdersPaged

(

@PageIndex int,

@PageSize int

)

AS

BEGIN

DECLARE @PageLowerBound int

DECLARE @PageUpperBound int

DECLARE @RowsToReturn int

-- First set the rowcount

SET @RowsToReturn = @PageSize * (@PageIndex + 1)

SET ROWCOUNT @RowsToReturn

-- Set the page bounds

SET @PageLowerBound = @PageSize * @PageIndex

SET @PageUpperBound = @PageLowerBound + @PageSize + 1

-- Create a temp table to store the select results

CREATE TABLE #PageIndex

(

IndexId int IDENTITY (1, 1) NOT NULL,

OrderID int

)

-- Insert into the temp table

INSERT INTO #PageIndex (OrderID)

SELECT

OrderID

FROM

Orders

ORDER BY

OrderID DESC

-- Return total count

--SELECT COUNT(OrderID) FROM Orders

-- Return paged results

SELECT

O.*

FROM

Orders O,

#PageIndex PageIndex

WHERE

O.OrderID = PageIndex.OrderID AND

PageIndex.IndexID > @PageLowerBound AND

PageIndex.IndexID < @PageUpperBound

ORDER BY

PageIndex.IndexID

END

GO

参考资料:

《编写高性能 Web 应用程序的 10 个技巧》

《ASP.NET揭秘》

 
 
 
免责声明:本文为网络用户发布,其观点仅代表作者个人观点,与本站无关,本站仅提供信息存储服务。文中陈述内容未经本站证实,其真实性、完整性、及时性本站不作任何保证或承诺,请读者仅作参考,并请自行核实相关内容。
2023年上半年GDP全球前十五强
 百态   2023-10-24
美众议院议长启动对拜登的弹劾调查
 百态   2023-09-13
上海、济南、武汉等多地出现不明坠落物
 探索   2023-09-06
印度或要将国名改为“巴拉特”
 百态   2023-09-06
男子为女友送行,买票不登机被捕
 百态   2023-08-20
手机地震预警功能怎么开?
 干货   2023-08-06
女子4年卖2套房花700多万做美容:不但没变美脸,面部还出现变形
 百态   2023-08-04
住户一楼被水淹 还冲来8头猪
 百态   2023-07-31
女子体内爬出大量瓜子状活虫
 百态   2023-07-25
地球连续35年收到神秘规律性信号,网友:不要回答!
 探索   2023-07-21
全球镓价格本周大涨27%
 探索   2023-07-09
钱都流向了那些不缺钱的人,苦都留给了能吃苦的人
 探索   2023-07-02
倩女手游刀客魅者强控制(强混乱强眩晕强睡眠)和对应控制抗性的关系
 百态   2020-08-20
美国5月9日最新疫情:美国确诊人数突破131万
 百态   2020-05-09
荷兰政府宣布将集体辞职
 干货   2020-04-30
倩女幽魂手游师徒任务情义春秋猜成语答案逍遥观:鹏程万里
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案神机营:射石饮羽
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案昆仑山:拔刀相助
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案天工阁:鬼斧神工
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案丝路古道:单枪匹马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:与虎谋皮
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:李代桃僵
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案镇郊荒野:指鹿为马
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:小鸟依人
 干货   2019-11-12
倩女幽魂手游师徒任务情义春秋猜成语答案金陵:千金买邻
 干货   2019-11-12
 
推荐阅读
 
 
 
>>返回首頁<<
 
靜靜地坐在廢墟上,四周的荒凉一望無際,忽然覺得,淒涼也很美
© 2005- 王朝網路 版權所有