[转帖]DataGrid的自定义分页UserControl

PageChange.ascx

1@ Control Language="c#" AutoEventWireup="false" Codebehind="PageChange.ascx.cs" Inherits="Ex_Test.PageChange" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"

 1<font face="宋体">
 2<table border="0" cellpadding="1" cellspacing="1" id="Table1" width="98%">
 3<tr>
 4<td align="right"><asp:linkbutton id="FirstPage" runat="server">[首 页]</asp:linkbutton>    
 5<asp:linkbutton id="PrevPage" runat="server">[上一页]</asp:linkbutton>    
 6<asp:linkbutton id="NextPage" runat="server">[下一页]</asp:linkbutton>    
 7<asp:linkbutton id="LastPage" runat="server">[末 页]</asp:linkbutton>    
 8<asp:literal id="Literal1" runat="server" text="转到第"></asp:literal><asp:textbox id="NewPageIndex" runat="server" width="31px"></asp:textbox><asp:literal id="Literal2" runat="server" text="页"></asp:literal>    
 9<asp:button id="NewPageGo" runat="server" text="Go"></asp:button> </td>
10</tr>
11</table>
12</font>

=======================================================================

PageChange.ascx.cs

namespace Ex_Test
{
using System;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

///

1<summary>   
2///  PageChange 的摘要说明。   
3/// </summary>

public abstract class PageChange : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.Button NewPageGo;
protected System.Web.UI.WebControls.Literal Literal2;
protected System.Web.UI.WebControls.TextBox NewPageIndex;
protected System.Web.UI.WebControls.Literal Literal1;
protected System.Web.UI.WebControls.LinkButton LastPage;
protected System.Web.UI.WebControls.LinkButton NextPage;
protected System.Web.UI.WebControls.LinkButton PrevPage;
protected System.Web.UI.WebControls.LinkButton FirstPage;
protected int currentpage;
protected int pagesize;
protected string proc;
protected System.Web.UI.WebControls.DataGrid datagrid;

public int _CurrentPage
{
get
{
return currentpage;
}
set
{
currentpage = value;
}
}

public int _pageSize
{
get
{
return pagesize;
}
set
{
pagesize = value;
}
}

public string _proc
{
get
{
return proc;
}
set
{
proc = value;
}
}

public DataGrid _datagrid
{
get
{
return datagrid;
}
set
{
datagrid = value;
}
}

protected int rowcount;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!IsPostBack)
{
using(SqlConnection conn = new SqlConnection("User id=sa;password=admin;server=server-mk;initial catalog=pubs;timeout=90" )
{
SqlCommand cmd = new SqlCommand("select count(*) as expr1 from authors",conn);
cmd.Connection.Open();
rowcount = (int)cmd.ExecuteScalar();
cmd.Connection.Close();
ViewState["rowscount"] = rowcount;
}
ViewState["currentpage"] = currentpage;
FillGrid(proc,currentpage,pagesize,datagrid);
}
}

#region Web Form Designer generated code
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);
}

/// 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。
/// private void InitializeComponent()
{
this.FirstPage.Click += new System.EventHandler(this.FirstPage_Click);
this.PrevPage.Click += new System.EventHandler(this.PrevPage_Click);
this.NextPage.Click += new System.EventHandler(this.NextPage_Click);
this.LastPage.Click += new System.EventHandler(this.LastPage_Click);
this.NewPageGo.Click += new System.EventHandler(this.NewPageGo_Click);
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

private void FillGrid(string proc,int currentpage,int pagesize,DataGrid datagrid)
{
using(SqlConnection conn = new SqlConnection("User id=sa;password=admin;server=server-mk;initial catalog=pubs;timeout=90" )
{
SqlCommand cmd = new SqlCommand(proc,conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@CurrentPage",currentpage);
cmd.Parameters.Add("@PageSize",pagesize);
cmd.Connection.Open();

SqlDataReader sdr = cmd.ExecuteReader();
datagrid.DataSource = sdr;
datagrid.DataBind();
sdr.Close();
cmd.Connection.Close();
}
}

//首页
private void FirstPage_Click(object sender, System.EventArgs e)
{
//disabled首页按钮和上一页按钮
FirstPage.Enabled = false;
PrevPage.Enabled = false;
currentpage = 0;
ViewState["currentpage"] = currentpage;
FillGrid(proc,currentpage,pagesize,datagrid);
//如果不止一页
if((int)ViewState["rowscount"]>((int)ViewState["currentpage"]+1)*pagesize)
{
NextPage.Enabled = true;
}
if((int)ViewState["rowscount"]>((int)ViewState["currentpage"]+1)*pagesize)
{
LastPage.Enabled = true;
}
}

//上一页
private void PrevPage_Click(object sender, System.EventArgs e)
{

NextPage.Enabled = true;
LastPage.Enabled = true;
currentpage = (int)ViewState["currentpage"]-1;
ViewState["currentpage"] = currentpage;
FillGrid(proc,currentpage,pagesize,datagrid);
//如果到首页则disabled首页和上一页按钮
if((int)ViewState["currentpage"]==0)
{
PrevPage.Enabled = false;
FirstPage.Enabled = false;
//return;
}
}

//下一页
private void NextPage_Click(object sender, System.EventArgs e)
{
ViewState["currentpage"] = (int)ViewState["currentpage"]+1;
currentpage = (int)ViewState["currentpage"];
FillGrid(proc,currentpage,pagesize,datagrid);
PrevPage.Enabled = true;
FirstPage.Enabled = true;
//如果已经到了最后一页
if(((int)ViewState["currentpage"]+1)*pagesize>(int)ViewState["rowscount"])
{
NextPage.Enabled = false;
LastPage.Enabled = false;
}
}

//末页
private void LastPage_Click(object sender, System.EventArgs e)
{
LastPage.Enabled = false;
NextPage.Enabled = false;
ViewState["currentpage"] = (int)Math.Ceiling((int)ViewState["rowscount"]/pagesize);
currentpage = (int)ViewState["currentpage"];
FillGrid(proc,currentpage,pagesize,datagrid);
//如果有不止一页的纪录
if((int)ViewState["currentpage"]>1)
{
FirstPage.Enabled = true;
PrevPage.Enabled = true;
}
//如果只有一页的纪录
else
{
FirstPage.Enabled = false;
PrevPage.Enabled = false;
}
}

//跳转
private void NewPage_Go(string i)
{
try
{
int PageIndex = Int32.Parse(i);
if (PageIndex<=0)
{
PageIndex = 0;
}
else
{
if(PageIndex>(int)Math.Ceiling((int)ViewState["rowscount"]/pagesize))
{
PageIndex = (int)Math.Ceiling((int)ViewState["rowscount"]/pagesize);
}
else
{
PageIndex--;
}
}
//简单起见,将所有的linkbutton全部改为enable=true
FirstPage.Enabled = true;
NextPage.Enabled = true;
LastPage.Enabled = true;
PrevPage.Enabled = true;
ViewState["currentpage"] = PageIndex;
FillGrid(proc,(int)ViewState["currentpage"],pagesize,datagrid);
}
catch(Exception)
{
return;
}
}

private void NewPageGo_Click(object sender, System.EventArgs e)
{
NewPage_Go(NewPageIndex.Text.Trim());
}

}
}

PageForm.aspx

1@ Page language="c#" Codebehind="PageForm.aspx.cs" AutoEventWireup="false" Inherits="Ex_Test.PageForm" 

1@ Register TagPrefix="MK" TagName="PageChange" src="PageChange.ascx"

 1<html>
 2<head>
 3<title>PageForm</title>
 4<meta content="Microsoft Visual Studio 7.0" name="GENERATOR"/>
 5<meta content="C#" name="CODE_LANGUAGE"/>
 6<meta content="JavaScript" name="vs_defaultClientScript"/>
 7<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema"/>
 8</head>
 9<body ms_positioning="GridLayout">
10<form id="PageForm" method="post" runat="server">
11<asp ![](http:="" allowcustompaging="True" allowpaging="True" atagrid="" bbs="" biggrin.gif)="" id="DataGrid1" images="" runat="server" style="Z-INDEX: 101; LEFT: 57px; POSITION: absolute; TOP: 54px" www.blueidea.com="">
12<pagerstyle visible="False"></pagerstyle>
13</asp>
14<asp ![](http:="" anel="" bbs="" id="Panel1" images="" runat="server" style="Z-INDEX: 102; LEFT: 60px; POSITION: absolute; TOP: 20px" tongue.gif)="" width="634px" www.blueidea.com="">
15<mk ![](http:="" agechange="" bbs="" id="pc" images="" runat="server" tongue.gif)="" www.blueidea.com=""></mk>
16</asp><font face="宋体"></font>
17</form>
18</body>
19</html>

=================================================================

PageForm.aspx.cs

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;

namespace Ex_Test
{
///

1<summary>   
2/// PageForm 的摘要说明。   
3/// </summary>

public class PageForm : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.Panel Panel1;
protected Ex_Test.PageChange pc;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
//if(!IsPostBack)
//{
pc._CurrentPage = 0;
pc._datagrid = DataGrid1;
pc._pageSize =7;
pc._proc = "Page_Change";
//}
}

#region Web Form Designer generated code
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);
}

///

1<summary>   
2/// 设计器支持所需的方法 - 不要使用代码编辑器修改   
3/// 此方法的内容。   
4/// </summary>

private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion
}

}

存储过程:
Create PROCEDURE dbo.Page_Change
/*
(
@parameter1 datatype = default value,
@parameter2 datatype OUTPUT
)
*/
(
@PageSize int,
@CurrentPage int
)

AS
/* SET NOCOUNT ON */

select *,IDENTITY(int,1,1) as Num into #TempAuthors from Authors

select * from #TempAuthors where Num > (@PageSize*@CurrentPage) and Num < (@PageSize*@CurrentPage+@PageSize+1)

RETURN

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