Repeater自定义分页(1)

Repeater自定义分页，使用的存储过程如下

--取得总记录数
ifexists(select1fromsys.objectswherename='GetProductsCount'andtype='P')
dropprocGetProductsCount
go
CREATEPROCEDUREGetProductsCount
as
selectcount(*)fromproducts
go
--使用row_number函数
--SQLServer2005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rowindex.
ifexists(select1fromsys.objectswherename='GetProductsByPage'andtype='P')
dropprocGetProductsByPage
go
CREATEPROCEDUREGetProductsByPage
@PageNumberint,
@PageSizeint
AS
selectProductID,ProductName,SupplierID,CategoryID,QuantityPerUnit,UnitPrice,UnitsInStock,UnitsOnOrder,ReorderLevel,Discontinued
from
(selectrow_number()Over(orderbyproductid)asrow,ProductID,ProductName,SupplierID,CategoryID,QuantityPerUnit,UnitPrice,UnitsInStock,UnitsOnOrder,ReorderLevel,Discontinued
fromproducts)asProductsWithRowNumber
whererowbetween(@PageNumber-1)*@PageSize+1and@PageNumber*@PageSize
go

--execGetProductsByPage1,10
--execGetProductsByPage5,10

--取得总记录数
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
--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

页面代码如下:

<asp:linkbuttonid="lbtnFirst"runat="server"commandname="First"oncommand="lbtnPage_Command">|<</asp:linkbutton>
<asp:linkbuttonid="lbtnPrevious"runat="server"commandname="Previous"oncommand="lbtnPage_Command"><<</asp:linkbutton>
<asp:labelid="lblMessage"runat="server">
<asp:linkbuttonid="lbtnNext"runat="server"commandname="Next"oncommand="lbtnPage_Command">>></asp:linkbutton>
<asp:linkbuttonid="lbtnLast"runat="server"commandname="Last"oncommand="lbtnPage_Command">>|</asp:linkbutton>
转到第<asp:dropdownlistid="dropPage"runat="server"autopostback="True"onselectedindexchanged="dropPage_SelectedIndexChanged"></asp:dropdownlist>页
</asp:label>

<linkbutton id="lbtnFirst" runat="server" commandname="First" oncommand="lbtnPage_Command">|&lt;</linkbutton><linkbutton id="lbtnPrevious" runat="server" commandname="Previous" oncommand="lbtnPage_Command">&lt;&lt;</linkbutton><linkbutton id="lbtnNext" runat="server" commandname="Next" oncommand="lbtnPage_Command">&gt;&gt;</linkbutton><linkbutton id="lbtnLast" runat="server" commandname="Last" oncommand="lbtnPage_Command">&gt;|</linkbutton>  
转到第<dropdownlist id="dropPage" runat="server" autopostback="True" onselectedindexchanged="dropPage_SelectedIndexChanged"></dropdownlist>页     

后台代码如下:

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

publicpartialclassRepeaterPaging:System.Web.UI.Page
{
//每页显示的最多记录的条数
privateintpageSize=10;
//当前页号
privateintcurrentPageNumber;
//显示数据的总条数
privatestaticintrowCount;
//总页数
privatestaticintpageCount;

protectedvoidPage_Load(objectsender,EventArgse)
{
if(!IsPostBack)
{
SqlConnectioncn=newSqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);

SqlCommandcmd=newSqlCommand("GetProductsCount",cn);
cmd.CommandType=CommandType.StoredProcedure;
cn.Open();
rowCount=(int)cmd.ExecuteScalar();
cn.Close();
pageCount=(rowCount-1)/pageSize+1;
currentPageNumber=1;

for(inti=1;i<=pageCount;i++)
{
dropPage.Items.Add(newListItem(i.ToString(),i.ToString()));
}
dropPage.SelectedValue=dropPage.Items.FindByValue(currentPageNumber.ToString()).Value;
Query();
}
}

protectedvoidsdsProducts_Selecting(objectsender,SqlDataSourceSelectingEventArgse)
{
sdsProducts.SelectParameters["PageNumber"].DefaultValue=currentPageNumber.ToString();
sdsProducts.SelectParameters["PageSize"].DefaultValue=pageSize.ToString();
}

protectedvoidsdsProducts_Selected(objectsender,SqlDataSourceStatusEventArgse)
{
lblMessage.Text="共找到"+rowCount+"条记录,当前第"+currentPageNumber+"/"+pageCount+"页";
}

protectedvoidlbtnPage_Command(objectsender,CommandEventArgse)
{
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;
Query();
}

protectedvoiddropPage_SelectedIndexChanged(objectsender,EventArgse)
{
currentPageNumber=int.Parse(dropPage.SelectedValue);
Query();
}

privatevoidQuery()
{
ViewState["currentPageNumber"]=currentPageNumber;
SetButton(currentPageNumber);
sdsProducts.Select(DataSourceSelectArguments.Empty);
}

privatevoidSetButton(intcurrentPageNumber)
{
lbtnFirst.Enabled=currentPageNumber!=1;
lbtnPrevious.Enabled=currentPageNumber!=1;
lbtnNext.Enabled=currentPageNumber!=pageCount;
lbtnLast.Enabled=currentPageNumber!=pageCount;
}
}

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

public partial class RepeaterPaging : 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;

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

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

    protected void sdsProducts_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;
        Query();
    }

    protected void dropPage_SelectedIndexChanged(object sender, EventArgs e)
    {
        currentPageNumber = int.Parse(dropPage.SelectedValue);
        Query();
    }

    private void Query()
    {
        ViewState["currentPageNumber"] = currentPageNumber;
        SetButton(currentPageNumber);
        sdsProducts.Select(DataSourceSelectArguments.Empty);
    }

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

页面效果如下