| 以下为存储过程，一个是分页存储过程，一个是得到总记录的存储过程
分页存储过程：
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
ALTER PROCEDURE Test_GetOrders
(@PAGESIZE INT, --页面大小，如每页存储20条记录
@PAGEINDEX INT --当前页码
)
AS
SET NOCOUNT ON
BEGIN
DECLARE @INDEXTABLE TABLE(ID INT IDENTITY(1,1),NID INT) --定义表变量 DECLARE @PAGELOWERBOUND INT --定义此页的底码 DECLARE @PAGEUPPERBOUND INT --定义此页的顶码 SET @PAGELOWERBOUND=(@PAGEINDEX-1)*@PAGESIZE SET @PAGEUPPERBOUND=@PAGELOWERBOUND+@PAGESIZE SET ROWCOUNT @PAGEUPPERBOUND INSERT INTO @INDEXTABLE(NID) SELECT OrderID FROM Orders ORDER BY OrderID DESC SELECT ORDERID,CUSTOMERID,CONVERT(CHAR(10),ORDERDATE,120) AS ORDERDATE,
SHIPCITY,SHIPCOUNTRY,ISNULL(SHIPREGION,'无') AS SHIPREGION
FROM ORDERS A
INNER JOIN @INDEXTABLE T
ON A.ORDERID=T.NID
WHERE T.ID>@PAGELOWERBOUND AND T.ID<=@PAGEUPPERBOUND
ORDER BY T.ID END SET NOCOUNT OFF
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
得到总记录的存储过程：
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO ALTER PROC GetOrderCount
AS
--得到ORDERS表的总记录数
SELECT COUNT(*) FROM ORDERS GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO 前台的代码：
<%@ Page language="c#" Codebehind="OrdersPage.aspx.cs" AutoEventWireup="false" Inherits="NetTest.OrdersPage" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>NorthWind数据库Orders表的分页例子</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<link href="Css/BasicLayout.css" rel="stylesheet" type="text/css">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<script language="javascript">
function SelectAll()
{
var len=document.Form1.elements.length;
var i;
for (i=0;i<len;i++)
{
if (document.Form1.elements[i].type=="checkbox")
{
document.Form1.elements[i].checked=true;
}
}
}
function UnSelectAll()
{
var len=document.Form1.elements.length;
var i;
for (i=0;i<len;i++)
{
if (document.Form1.elements[i].type=="checkbox")
{
document.Form1.elements[i].checked=false;
}
}
}
</script>
<form id="Form1" method="post" runat="server">
<table align="center" border="0" width="60%">
<tr>
<td align="right">
<asp:RegularExpressionValidator id="RegularExpressionValidator1" runat="server" ErrorMessage="页数只能为数字" Display="None"
ControlToValidate="txtPage" ValidationExpression="\d{0,10}"></asp:RegularExpressionValidator>
<asp:ValidationSummary id="ValidationSummary1" runat="server" ShowMessageBox="True" ShowSummary="False"></asp:ValidationSummary></td>
</tr>
<TR>
<TD align="center"><font style="FONT-SIZE: 10pt">共</font>
<asp:label id="lbTotalPage" runat="server" CssClass="pageLinks"></asp:label>
<font style="FONT-SIZE: 10pt">页/共
<asp:label id="lbTotalCount" runat="server" CssClass="pageLinks"></asp:label>
记录 当前</font>
<asp:label id="lbCurrentPage" runat="server" CssClass="pageLinks"></asp:label>
<font style="FONT-SIZE: 10pt">页</font>
<font style="FONT-SIZE: 10pt">跳转到</font>
<asp:dropdownlist id="ddlPage" runat="server" AutoPostBack="True" Width="65px"></asp:dropdownlist>
<font style="FONT-SIZE: 10pt">页</font>
<asp:TextBox id="txtPage" runat="server" Width="43px"></asp:TextBox>
<asp:Button id="btnGo" runat="server" CssClass="redButtonCss" Width="34px" Text="GO"></asp:Button><FONT size="2">
</FONT>
</TD>
</TR>
<tr>
<td align="right"><INPUT type="button" value="全部选择" onclick="SelectAll()"><FONT face="宋体">
</FONT><INPUT type="button" value="全部取消" onclick="UnSelectAll()"><FONT face="宋体">
</FONT>
<asp:Button id="btnDelete" runat="server" Text="删除"></asp:Button><FONT face="宋体">
</FONT>
</td>
</tr>
<tr>
<td>
<asp:DataGrid id="dbOrders" runat="server" AutoGenerateColumns="False" Width="100%" BorderStyle="None"
BorderColor="#93BEE2" PageSize="20" AllowCustomPaging="True" AllowPaging="True" DataKeyField="OrderID">
<ItemStyle Font-Size="X-Small" HorizontalAlign="Center" Height="25px" BackColor="#CCFFFF"></ItemStyle>
<HeaderStyle Font-Size="X-Small" Font-Bold="True" HorizontalAlign="Center" Height="25px" BackColor="#6699FF"></HeaderStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<FONT face="宋体">
<asp:CheckBox id="cbFlag" runat="server"></asp:CheckBox></FONT>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="OrderID" HeaderText="订单编号"></asp:BoundColumn>
<asp:BoundColumn DataField="CustomerID" HeaderText="客户编号"></asp:BoundColumn>
<asp:BoundColumn DataField="OrderDate" HeaderText="订单日期"></asp:BoundColumn>
<asp:BoundColumn DataField="ShipCity" HeaderText="运输城市"></asp:BoundColumn>
<asp:BoundColumn DataField="ShipCountry" HeaderText="运输国家"></asp:BoundColumn>
<asp:BoundColumn DataField="ShipRegion" HeaderText="运输区域"></asp:BoundColumn>
<asp:ButtonColumn Text="删除" CommandName="Delete"></asp:ButtonColumn>
<asp:TemplateColumn>
<ItemTemplate>
<FONT face="宋体">
<asp:Button id="btnADelete" runat="server" CssClass="redButtonCss" CommandName="Delete" Text="删除"></asp:Button></FONT>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle Visible="False"></PagerStyle>
</asp:DataGrid>
</td>
</tr>
<tr>
<TD align="center" height="30"><B><asp:linkbutton id="FirstPage" runat="server" CssClass="pageLinks" Text="[First Page]" CommandName="First"
OnCommand="NavigationLink_Click">第一页</asp:linkbutton>
<asp:linkbutton id="PreviousPage" runat="server" CssClass="pageLinks" Text="[Previous Page]" CommandName="Prev"
OnCommand="NavigationLink_Click">上一页</asp:linkbutton>
<asp:linkbutton id="NextPage" runat="server" CssClass="pageLinks" Text="[Next Page]" CommandName="Next"
OnCommand="NavigationLink_Click">下一页</asp:linkbutton>
<asp:linkbutton id="LastPage" runat="server" CssClass="pageLinks" Text="[Last Page]" CommandName="Last"
OnCommand="NavigationLink_Click">末一页</asp:linkbutton></B>
</TD>
</tr>
</table>
</form>
</body>
</HTML>
|
后台代码：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using DataBaseClass;
using System.Data.SqlClient;
namespace NetTest
{
/// <summary>
/// OrdersPage 的摘要说明。
/// </summary>
public class OrdersPage : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lbTotalPage;
protected System.Web.UI.WebControls.Label lbTotalCount;
protected System.Web.UI.WebControls.Label lbCurrentPage;
protected System.Web.UI.WebControls.DropDownList ddlPage;
protected System.Web.UI.WebControls.LinkButton FirstPage;
protected System.Web.UI.WebControls.LinkButton PreviousPage;
protected System.Web.UI.WebControls.LinkButton NextPage;
protected System.Web.UI.WebControls.DataGrid dbOrders;
protected System.Web.UI.WebControls.LinkButton LastPage;
private ClassDataGrid CDG=new ClassDataGrid();//数据访问层的类，定义的的一个实例
protected System.Web.UI.WebControls.Button btnGo;
protected System.Web.UI.WebControls.TextBox txtPage;
protected System.Web.UI.WebControls.ValidationSummary ValidationSummary1;
protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
protected System.Web.UI.WebControls.Button btnDelete;
protected Int32 CurrentPageNumber = 1;//初始化，设置当前页为1,随时都要使用
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
BindData();
btnDelete.Attributes ["onclick"]="javascript:return confirm('您确认要删除吗?');";
}
} #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.ddlPage.SelectedIndexChanged += new System.EventHandler(this.ddlPage_SelectedIndexChanged);
this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
this.dbOrders.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dbOrders_ItemCommand);
this.dbOrders.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dbOrders_DeleteCommand);
this.dbOrders.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dbOrders_ItemDataBound);
this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion public Int32 GetCountOrders()
{
Int32 Tcount=Int32.Parse(CDG.GetOrderCount());//此处用到了数据访问层，得到总记录数，代码要自己写一下
return Tcount;
} protected void NavigationLink_Click ( Object sender, CommandEventArgs e )//此事件为HTML代码里注册（事件为OnCommand）
{
switch ( e.CommandName )//根据设置的CommandName属性判断
{
case "First":
CurrentPageNumber = 1;
break;
case "Last":
CurrentPageNumber = Int32.Parse ( lbTotalPage.Text );
break;
case "Next":
CurrentPageNumber = Int32.Parse ( lbCurrentPage.Text ) + 1;
break;
case "Prev":
CurrentPageNumber = Int32.Parse ( lbCurrentPage.Text ) - 1;
break;
}
BindData();
} public void BindData()
{
lbCurrentPage.Text = CurrentPageNumber.ToString();
int PageSize=int.Parse(dbOrders.PageSize.ToString());
//绑定DATAGRID，此处用到数据访问层，只要可以绑定就可以了(DataSet,DataTable都可以)，这里的代码要自己写一下
SqlDataReader dr=CDG.GetOrders(PageSize,CurrentPageNumber);
dbOrders.DataSource=Tools.ConvertDataReaderToDataTable(dr);
dbOrders.DataBind(); Double TotalPages = 1;//初始化，总页数为1
Double ModePages=0;//取模余数（判断总页数是否要加1）
Int32 TotalRecords = GetCountOrders();//调用上面的得到总记录数的方法
TotalPages = TotalRecords / PageSize;//得到总页数（总记录数除以每页的记录数）
ModePages=TotalRecords%PageSize;//得到取模的余数(总记录数取模每页的记录数)
if(ModePages>0)//如果取模数不等于0，则把总页数加1
{
TotalPages+=1;
}
if(ModePages==0)//如果取模数等于0,不做任何事（也可以不用判断）
{
} lbTotalPage.Text = TotalPages.ToString();//显示页面上的总页数
lbTotalCount.Text=TotalRecords.ToString();//显示页面上的总记录数 //以下为判断点击的按钮（第一页，上一页，下一页，末一页）是否可以用
if ( CurrentPageNumber == 1 )
{
PreviousPage.Enabled = false;
FirstPage.Enabled=false;
if ( TotalPages > 1 )
{
NextPage.Enabled = true;
LastPage.Enabled=true;
}
else
{
NextPage.Enabled = false;
LastPage.Enabled=false;
}
}
else
{
PreviousPage.Enabled = true;
FirstPage.Enabled=true; if ( CurrentPageNumber == TotalPages )
{
NextPage.Enabled = false;
LastPage.Enabled=false;
}
else
{
NextPage.Enabled = true;
LastPage.Enabled=true;
}
} ddlPage.Items.Clear();//清楚跳转的页数（如果不清除，里面的记录将会循环增加）
int PCount=int.Parse(lbTotalPage.Text);//得到总页数，为了循环
for(int i=1;i<=PCount;i++)
{
ddlPage.Items.Add(i.ToString());
}
ddlPage.Items.FindByText(CurrentPageNumber.ToString()).Selected=true;//把当前页显示在列表框的第一个
} private void ddlPage_SelectedIndexChanged(object sender, System.EventArgs e)
{
int PageSize=int.Parse(ddlPage.SelectedValue.ToString());
int PageCount=Int32.Parse(lbTotalPage.Text.Trim().ToString());
if(PageSize<1)
{
CurrentPageNumber=1;
}
else if(PageSize>PageCount)
{
CurrentPageNumber=PageCount;
}
else
{
CurrentPageNumber=PageSize;
}
BindData();
} private void btnGo_Click(object sender, System.EventArgs e)
{
int PageSize=int.Parse(txtPage.Text.Trim().ToString());
int PageCount=Int32.Parse(lbTotalPage.Text.Trim().ToString());
if(PageSize<1)
{
CurrentPageNumber=1;
}
else if(PageSize>PageCount)
{
CurrentPageNumber=PageCount;
}
else
{
CurrentPageNumber=PageSize;
}
BindData();
} private void btnDelete_Click(object sender, System.EventArgs e)
{
try
{
string SelectedString = "";//定义一个变量
foreach(DataGridItem data in dbOrders.Items)
{
for(int i=0;i<data.Cells[0].Controls.Count;i++)//循环DataGrid的第一个单元格
{
if(data.Cells[0].Controls[i].GetType().ToString()=="System.Web.UI.WebControls.CheckBox")//判断类型是否为CheckBox
{
if(((CheckBox)data.Cells[0].Controls[i]).Checked==true)//如果CheckBox被选中
{
SelectedString += dbOrders.DataKeys[data.ItemIndex].ToString() + ",";
//因为设置了DataGrid的DataKeyField属性（编号），所以可以根据Datakeys得到选中CheckBox的那行所对应的那条记录的编号
//以逗号分隔，加入同一个字符串中
}
}
}
}
if(SelectedString!="")
{
bool result=true;
SelectedString = SelectedString.Substring(0,SelectedString.Length-1);//截取最后一个逗号
string[] Arr = SelectedString.Split(',');//分割字符串，放入数组中
for(int i=0;i<Arr.Length;i++)//循环数组
{
if(Arr[i].Trim()!="")//如果值不为空
{
//result=CDG.DeleteOrder(Int32.Parse(arrselected[i]));//删除一条记录
//这里的DeleteUser是我写的数据层的方法，返回的是bool，如果删除成功，返回true;
//此处的删除方法可以根据自己的需求写，所以这里就不写了
}
}
if(result)
{
Response.Write("<script>alert('用户删除成功')</script>");
}
}
BindData();
}
catch
{
Response.Write("<script>alert('过程出现错误，删除失败，请查找原因')</script>");
}
} private void dbOrders_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemType==ListItemType.Item)//这是判断属性生成器里添加的删除，弹出一个删除对话框
{
if(e.Item.ItemType==ListItemType.Item)//这个删除的事件在DeleteCommand中执行
{
LinkButton btn=(LinkButton)e.Item.Cells[7].Controls[0];
btn.Attributes.Add ("onclick",
"return confirm (\"确定要删除此项记录吗？\");");
}
}
if(e.Item.ItemType==ListItemType.Item || e.Item.ItemType==ListItemType.AlternatingItem)//这是判断模板列中里添加的删除按钮（Button,ImageButton也可以)，弹出一个删除对话框
{
Button button = (Button) e.Item.FindControl("btnADelete");//这个事件在ItemCommand事件中执行
//ImageButton button = (ImageButton) e.Item.FindControl("Imagebutton1");
button.Attributes.Add ("onclick",
"return confirm (\"确定要删除此项记录吗？\");");
}
} private void dbOrders_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
//写你的删除事件,下面是举例，具体根据自己的实际情况而定
int OrderID=int.Parse(dbOrders.DataKeys[e.Item.ItemIndex].ToString());//得到该行的对应的编号
// bool result=CDG.DeleteOrder(OrderID);
// if(result)
// {
// Response.Write("<script>alert('用户删除成功')</script>");
// }
} private void dbOrders_ItemCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
int OrderID=int.Parse(dbOrders.DataKeys[e.Item.ItemIndex].ToString());//得到该行的对应的编号
if(e.CommandName.Equals("Delete"))//此属性为设置的控件的CommandName，刚才设置的是Delete，表示删除（其他也可以）
{
//写你的删除事件,下面是举例，具体根据自己的实际情况而定
//bool result=CDG.DeleteOrder(OrderID);
// if(result)
// {
// Response.Write("<script>alert('用户删除成功')</script>");
// }
}
} }
}
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