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GridView自定义分页的四种存储过程

2009-04-27 11:31 375 查看
http://blog.csdn.net/lovexx1122/archive/2008/07/29/2731885.aspx
使用存储过程对GridView进行分页的4种写法(分别是使用Top关键字,临时表,临时表变量和SQL Server 2005 新加的Row_Number()函数)

if exists(select 1 from sys.objects where name = 'GetProductsCount' and type = 'P')
drop proc GetProductsCount
go
CREATE PROCEDURE GetProductsCount
as
select count(*) from products
go

--1.使用Top
if exists(select 1 from sys.objects where name = 'GetProductsByPage' and type = 'P')
drop proc GetProductsByPage
go
CREATE PROCEDURE GetProductsByPage
@PageNumber int,
@PageSize int
AS
declare @sql nvarchar(4000)
set @sql = 'select top ' + Convert(varchar, @PageSize)
+ ' * from products where productid not in (select top ' + Convert(varchar, (@PageNumber - 1) * @PageSize)  + ' productid from products)'
exec sp_executesql @sql
go

--exec GetProductsByPage 1, 10
--exec GetProductsByPage 5, 10

--2.使用临时表
if exists(select 1 from sys.objects where name = 'GetProductsByPage' and type = 'P')
drop proc GetProductsByPage
go
CREATE PROCEDURE GetProductsByPage
@PageNumber int,
@PageSize int
AS
-- 创建临时表
CREATE TABLE #TempProducts
(
ID int IDENTITY PRIMARY KEY,
ProductID int,
ProductName varchar(40) ,
SupplierID int,
CategoryID int,
QuantityPerUnit nvarchar(20),
UnitPrice money,
UnitsInStock smallint,
UnitsOnOrder smallint,
ReorderLevel smallint,
Discontinued bit
)
-- 填充临时表
INSERT INTO #TempProducts
(ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued)
SELECT ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
FROM Products

DECLARE @FromID int
DECLARE @ToID int
SET @FromID = ((@PageNumber - 1) * @PageSize) + 1
SET @ToID = @PageNumber * @PageSize

SELECT ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
FROM #TempProducts
WHERE ID >= @FromID AND ID <= @ToID
go

--exec GetProductsByPage 1, 10
--exec GetProductsByPage 5, 10

--3.使用表变量
/*
为要分页的数据创建一个table变量,这个table变量里有一个作为主健的IDENTITY列.这样需要分页的每条记录在table变量里就和一个row index(通过IDENTITY列)关联起来了.一旦table变量产生,连接数据库表的SELECT语句就被执行,获取需要的记录.SET ROWCOUNT用来限制放到table变量里的记录的数量.
当SET ROWCOUNT的值指定为PageNumber * PageSize时,这个方法的效率取决于被请求的页数.对于比较前面的页来说– 比如开始几页的数据– 这种方法非常有效. 但是对接近尾部的页来说,这种方法的效率和默认分页时差不多
*/
if exists(select 1 from sys.objects where name = 'GetProductsByPage' and type = 'P')
drop proc GetProductsByPage
go
CREATE PROCEDURE GetProductsByPage
@PageNumber int,
@PageSize int
AS
DECLARE @TempProducts TABLE
(
ID int IDENTITY,
productid int
)
DECLARE @maxRows int
SET @maxRows = @PageNumber * @PageSize
--在返回指定的行数之后停止处理查询
SET ROWCOUNT @maxRows

INSERT INTO @TempProducts (productid)
SELECT productid
FROM products
ORDER BY productid

SET ROWCOUNT @PageSize

SELECT p.*
FROM @TempProducts t INNER JOIN products p
ON t.productid = p.productid
WHERE ID > (@PageNumber - 1) * @PageSize
SET ROWCOUNT 0
GO

--exec GetProductsByPage 1, 10
--exec GetProductsByPage 5, 10

--4.使用row_number函数
--SQL Server 2005的新特性,它可以将记录根据一定的顺序排列,每条记录和一个等级相关 这个等级可以用来作为每条记录的row index.
if exists(select 1 from sys.objects where name = 'GetProductsByPage' and type = 'P')
drop proc GetProductsByPage
go
CREATE PROCEDURE GetProductsByPage
@PageNumber int,
@PageSize int
AS
select ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
from
(select row_number() Over (order by productid) as row,ProductID, ProductName, SupplierID, CategoryID, QuantityPerUnit, UnitPrice, UnitsInStock, UnitsOnOrder, ReorderLevel, Discontinued
from products) as ProductsWithRowNumber
where row between (@PageNumber - 1) * @PageSize + 1 and @PageNumber * @PageSize
go

--exec GetProductsByPage 1, 10
--exec GetProductsByPage 5, 10


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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewPaging.aspx.cs" Inherits="GridViewPaging" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

<title>Paging</title>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:LinkButton id="lbtnFirst" runat="server" CommandName="First" OnCommand="lbtnPage_Command">|<</asp:LinkButton>

<asp:LinkButton id="lbtnPrevious" runat="server" CommandName="Previous" OnCommand="lbtnPage_Command"><<</asp:LinkButton>

<asp:Label id="lblMessage" runat="server" />

<asp:LinkButton id="lbtnNext" runat="server" CommandName="Next" OnCommand="lbtnPage_Command">>></asp:LinkButton>

<asp:LinkButton id="lbtnLast" runat="server" CommandName="Last" OnCommand="lbtnPage_Command">>|</asp:LinkButton>

转到第<asp:DropDownList ID="dropPage" runat="server" AutoPostBack="True" OnSelectedIndexChanged="dropPage_SelectedIndexChanged"></asp:DropDownList>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID" DataSourceID="SqlDataSource1">

<Columns>

<asp:BoundField DataField="ProductID" HeaderText="ProductID" InsertVisible="False" ReadOnly="True" />

<asp:BoundField DataField="ProductName" HeaderText="ProductName" />

<asp:BoundField DataField="SupplierID" HeaderText="SupplierID" />

<asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />

<asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" />

<asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />

<asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" />

<asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" />

<asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel" />

<asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" />

</Columns>

</asp:GridView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=./sqlexpress;Initial Catalog=Northwind;Integrated Security=True" ProviderName="System.Data.SqlClient" SelectCommand="GetProductsByPage" SelectCommandType="StoredProcedure" OnSelecting="SqlDataSource1_Selecting" OnSelected="SqlDataSource1_Selected">

<SelectParameters>

<asp:Parameter Name="PageNumber" Type="Int32" />

<asp:Parameter Name="PageSize" Type="Int32" />

</SelectParameters>

</asp:SqlDataSource>

</div>

</form>

</body>

</html>

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewPaging.aspx.cs" Inherits="GridViewPaging" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Paging</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:LinkButton id="lbtnFirst" runat="server" CommandName="First" OnCommand="lbtnPage_Command">|<</asp:LinkButton>
<asp:LinkButton id="lbtnPrevious" runat="server" CommandName="Previous" OnCommand="lbtnPage_Command"><<</asp:LinkButton>
<asp:Label id="lblMessage" runat="server" />
<asp:LinkButton id="lbtnNext" runat="server" CommandName="Next" OnCommand="lbtnPage_Command">>></asp:LinkButton>
<asp:LinkButton id="lbtnLast" runat="server" CommandName="Last" OnCommand="lbtnPage_Command">>|</asp:LinkButton>
转到第<asp:DropDownList ID="dropPage" runat="server" AutoPostBack="True" OnSelectedIndexChanged="dropPage_SelectedIndexChanged"></asp:DropDownList>页
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ProductID" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="ProductID" HeaderText="ProductID" InsertVisible="False" ReadOnly="True" />
<asp:BoundField DataField="ProductName" HeaderText="ProductName" />
<asp:BoundField DataField="SupplierID" HeaderText="SupplierID" />
<asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />
<asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" />
<asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />
<asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" />
<asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" />
<asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel" />
<asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=./sqlexpress;Initial Catalog=Northwind;Integrated Security=True" ProviderName="System.Data.SqlClient" SelectCommand="GetProductsByPage" SelectCommandType="StoredProcedure" OnSelecting="SqlDataSource1_Selecting" OnSelected="SqlDataSource1_Selected">
<SelectParameters>
<asp:Parameter Name="PageNumber" Type="Int32" />
<asp:Parameter Name="PageSize" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>


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using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class GridViewPaging : System.Web.UI.Page

{

//每页显示的最多记录的条数

private int pageSize = 10;

//当前页号

private int currentPageNumber;

//显示数据的总条数

private static int rowCount;

//总页数

private static int pageCount;

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);

SqlCommand cmd = new SqlCommand("GetProductsCount", cn);

cmd.CommandType = CommandType.StoredProcedure;

cn.Open();

rowCount = (int)cmd.ExecuteScalar();

cn.Close();

pageCount = (rowCount - 1) / pageSize + 1;

currentPageNumber = 1;

ViewState["currentPageNumber"] = currentPageNumber;

lbtnPrevious.Enabled = false;

lbtnFirst.Enabled = false;

for (int i = 1; i <= pageCount; i++)

{

dropPage.Items.Add(new ListItem(i.ToString(), i.ToString()));

}

dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;

SqlDataSource1.Select(DataSourceSelectArguments.Empty);

}

}

protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)

{

SqlDataSource1.SelectParameters["PageNumber"].DefaultValue = currentPageNumber.ToString();

SqlDataSource1.SelectParameters["PageSize"].DefaultValue = pageSize.ToString();

}

protected void SqlDataSource1_Selected(object sender, SqlDataSourceStatusEventArgs e)

{

lblMessage.Text = "共找到" + rowCount + "条记录, 当前第" + currentPageNumber + "/" + pageCount + "页";

}

protected void lbtnPage_Command(object sender, CommandEventArgs e)

{

switch (e.CommandName)

{

case "First":

currentPageNumber = 1;

break;

case "Previous":

currentPageNumber = (int)ViewState["currentPageNumber"] - 1 > 1 ? (int)ViewState["currentPageNumber"] - 1 : 1;

break;

case "Next":

currentPageNumber = (int)ViewState["currentPageNumber"] + 1 < pageCount ? (int)ViewState["currentPageNumber"] + 1 : pageCount;

break;

case "Last":

currentPageNumber = pageCount;

break;

}

dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;

ViewState["currentPageNumber"] = currentPageNumber;

SetButton(currentPageNumber);

SqlDataSource1.Select(DataSourceSelectArguments.Empty);

}

private void SetButton(int currentPageNumber)

{

lbtnFirst.Enabled = currentPageNumber != 1;

lbtnPrevious.Enabled = currentPageNumber != 1;

lbtnNext.Enabled = currentPageNumber != pageCount;

lbtnLast.Enabled = currentPageNumber != pageCount;

}

protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)

{

currentPageNumber = int.Parse(dropPage.SelectedValue);

ViewState["currentPageNumber"] = currentPageNumber;

SetButton(currentPageNumber);

SqlDataSource1.Select(DataSourceSelectArguments.Empty);

}

}

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class GridViewPaging : System.Web.UI.Page
{
//每页显示的最多记录的条数
private int pageSize = 10;
//当前页号
private int currentPageNumber;
//显示数据的总条数
private static int rowCount;
//总页数
private static int pageCount;

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);

SqlCommand cmd = new SqlCommand("GetProductsCount", cn);
cmd.CommandType = CommandType.StoredProcedure;
cn.Open();
rowCount = (int)cmd.ExecuteScalar();
cn.Close();
pageCount = (rowCount - 1) / pageSize + 1;
currentPageNumber = 1;
ViewState["currentPageNumber"] = currentPageNumber;
lbtnPrevious.Enabled = false;
lbtnFirst.Enabled = false;

for (int i = 1; i <= pageCount; i++)
{
dropPage.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
SqlDataSource1.Select(DataSourceSelectArguments.Empty);
}
}

protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
{
SqlDataSource1.SelectParameters["PageNumber"].DefaultValue = currentPageNumber.ToString();
SqlDataSource1.SelectParameters["PageSize"].DefaultValue = pageSize.ToString();
}

protected void SqlDataSource1_Selected(object sender, SqlDataSourceStatusEventArgs e)
{
lblMessage.Text = "共找到" + rowCount + "条记录, 当前第" + currentPageNumber + "/" + pageCount + "页";
}

protected void lbtnPage_Command(object sender, CommandEventArgs e)
{
switch (e.CommandName)
{
case "First":
currentPageNumber = 1;
break;
case "Previous":
currentPageNumber = (int)ViewState["currentPageNumber"] - 1 >  1 ? (int)ViewState["currentPageNumber"] - 1 : 1;
break;
case "Next":
currentPageNumber = (int)ViewState["currentPageNumber"] + 1 < pageCount ? (int)ViewState["currentPageNumber"] + 1 : pageCount;
break;
case "Last":
currentPageNumber = pageCount;
break;
}
dropPage.SelectedValue = dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
ViewState["currentPageNumber"] = currentPageNumber;
SetButton(currentPageNumber);
SqlDataSource1.Select(DataSourceSelectArguments.Empty);
}

private void SetButton(int currentPageNumber)
{
lbtnFirst.Enabled = currentPageNumber != 1;
lbtnPrevious.Enabled = currentPageNumber != 1;
lbtnNext.Enabled = currentPageNumber != pageCount;
lbtnLast.Enabled = currentPageNumber != pageCount;
}

protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)
{
currentPageNumber = int.Parse(dropPage.SelectedValue);
ViewState["currentPageNumber"] = currentPageNumber;
SetButton(currentPageNumber);
SqlDataSource1.Select(DataSourceSelectArguments.Empty);
}
}

分页效果图:



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