利用aspnetPager控件实现分页

1)引入AspNetPager.dll

2)建立类Class_PageHelper.cs代码如下:

using System;

using System.Data;

using System.Configuration;

using System.Linq;

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.Xml.Linq;

using System.Data.SqlClient;

namespace b2b._Class

{

public class Class_PageHelper

{

public Class_PageHelper(string tblName, string strGetFields, string fldName, int pageSize, int pageIndex, bool doCount, bool orderType, string strWhere, string SqlConnectionStr)

{

//

// TODO: 在此处添加构造函数逻辑

//

this.tblName = tblName;

this.strGetFields = strGetFields;

this.fldName = fldName;

this.pageSize = pageSize;

this.pageIndex = pageIndex;

this.orderType = orderType;

this.doCount = doCount;

this.strWhere = strWhere;

this.SqlConnectionStr = SqlConnectionStr;

}

//定义属性

private string tblName;

public string TblName

{

get { return tblName; }

set { tblName = value; }

}

private string strGetFields = "*";

public string StrGetFields

{

get { return strGetFields; }

set { strGetFields = value; }

}

private string fldName = string.Empty;

public string FldName

{

get { return fldName; }

set { fldName = value; }

}

private int pageSize = 10;

public int PageSize

{

get { return pageSize; }

set { pageSize = value; }

}

private int pageIndex = 1;

public int PageIndex

{

get { return pageIndex; }

set { pageIndex = value; }

}

private bool doCount = false;

public bool DoCount

{

get { return doCount; }

set { doCount = value; }

}

private bool orderType = false;

public bool OrderType

{

get { return orderType; }

set { orderType = value; }

}

private string strWhere = string.Empty;

public string StrWhere

{

get { return strWhere; }

set { strWhere = value; }

}

private string SqlConnectionStr;

//返回一个SqlConnection

public SqlConnection CreateCon()

{

string SqlConnectionStr = this.SqlConnectionStr;

try

{

SqlConnection con = new SqlConnection(SqlConnectionStr);

return con;

}

catch (Exception)

{

return null;

}

}

//返回记录总数

public int GetRowCount()

{

if (!this.doCount)

{

throw new ArgumentException("要返回总数统计，DoCount属性一定为true");

}

SqlConnection con = this.CreateCon();

int rowCount;

try

{

con.Open();

SqlCommand smd = new SqlCommand("u_sys_pagination3", con);

smd.CommandType = CommandType.StoredProcedure;

//付值给参数

smd.Parameters.Add(new SqlParameter("@tblName", this.tblName));

smd.Parameters.Add(new SqlParameter("@strGetFields", this.strGetFields));

smd.Parameters.Add(new SqlParameter("@fldName", this.fldName));

smd.Parameters.Add(new SqlParameter("@pageSize", this.pageSize));

smd.Parameters.Add(new SqlParameter("@pageIndex", this.pageIndex));

smd.Parameters.Add(new SqlParameter("@doCount", this.doCount));

smd.Parameters.Add(new SqlParameter("@OrderType", this.orderType));

smd.Parameters.Add(new SqlParameter("@strWhere", this.strWhere));

rowCount = Convert.ToInt32(smd.ExecuteScalar());

smd.Parameters.Clear();

smd.Dispose();

}

catch (Exception)

{

rowCount = 0;

}

con.Close();

return rowCount;

}

public int GetPageCount()

{

return (int)Math.Ceiling((double)this.GetRowCount() / (double)this.pageSize);

}

//返回一个SqlDataReader

public SqlDataReader GetDataReader()

{

if (this.doCount)

{

throw new ArgumentException("要返回记录集，DoCount属性一定为false");

}

// System.Web.HttpContext.Current.Response.Write(pageindex);

SqlConnection con;

SqlDataReader sdr;

try

{

con = this.CreateCon();

con.Open();

SqlCommand smd = new SqlCommand("u_sys_pagination3", con);

smd.CommandType = CommandType.StoredProcedure;

//付值给参数

smd.Parameters.Add(new SqlParameter("@tblName", this.tblName));

smd.Parameters.Add(new SqlParameter("@strGetFields", this.strGetFields));

smd.Parameters.Add(new SqlParameter("@fldName", this.fldName));

smd.Parameters.Add(new SqlParameter("@pageSize", this.pageSize));

smd.Parameters.Add(new SqlParameter("@pageIndex", this.pageIndex));

smd.Parameters.Add(new SqlParameter("@doCount", this.doCount));

smd.Parameters.Add(new SqlParameter("@OrderType", this.orderType));

smd.Parameters.Add(new SqlParameter("@strWhere", this.strWhere));

sdr = smd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);

smd.Parameters.Clear();

smd.Dispose();

}

catch (Exception)

{

return null;

}

return sdr;

}

public DataSet GetDataSet()

{

if (this.doCount)

{

throw new ArgumentException("要返回记录集，DoCount属性一定为false");

}

SqlConnection con;

SqlDataAdapter sda;

DataSet ds = new DataSet();

try

{

con = this.CreateCon();

con.Open();

SqlCommand smd = new SqlCommand("u_sys_pagination3", con);

smd.CommandType = CommandType.StoredProcedure;

//付值给参数

smd.Parameters.Add(new SqlParameter("@tblName", this.tblName));

smd.Parameters.Add(new SqlParameter("@strGetFields", this.strGetFields));

smd.Parameters.Add(new SqlParameter("@fldName", this.fldName));

smd.Parameters.Add(new SqlParameter("@pageSize", this.pageSize));

smd.Parameters.Add(new SqlParameter("@pageIndex", this.pageIndex));

smd.Parameters.Add(new SqlParameter("@doCount", this.doCount));

smd.Parameters.Add(new SqlParameter("@OrderType", this.orderType));

smd.Parameters.Add(new SqlParameter("@strWhere", this.strWhere));

// HttpContext.Current.Response.Write("jiangjie");

sda = new SqlDataAdapter(smd);

sda.Fill(ds);

smd.Parameters.Clear();

smd.Dispose();

}

catch (Exception)

{

return null;

}

sda.Dispose();

con.Close();

return ds;

}

}

}

3)建立存储过程

CREATE PROCEDURE u_sys_pagination3

@tblName varchar(4000), -- 表名

@strGetFields varchar(200) = '*', -- 需要返回的列

@fldName varchar(200) = ' ', -- 排序的字段名

@pageSize int = 10, -- 页尺寸

@pageIndex int = 1, -- 页码

@doCount bit = 0, -- 返回记录总数, 非 0 值则返回

@orderType bit = 0, -- 设置排序类型, 非 0 值则降序

@strWhere varchar(4000) = ' ' -- 查询条件 (注意: 不要加 where)

AS

declare @strSQL varchar(8000) -- 主语句

declare @strTmp varchar(110) -- 临时变量

declare @strOrder varchar(400) -- 排序类型

if @doCount != 0

begin

if @strWhere !=' '

set @strSQL = 'select count(*) as Total from '+@tblName+' where '+@strWhere

else

set @strSQL = 'select count(*) as Total from '+@tblName+''

end

--以上代码的意思是如果@doCount传递过来的不是0，就执行总数统计。以下的所有代码都是@doCount为0的情况：

else

begin

if @orderType != 0

begin

set @strTmp = '<(select min'

set @strOrder = ' order by ' + @fldName + ' desc'

--如果@orderType不是0，就执行降序，这句很重要！

end

else

begin

set @strTmp = '>(select max'

set @strOrder = ' order by ' + @fldName + ' asc'

end

if @pageIndex = 1

begin

if @strWhere != ' '

set @strSQL = 'select top '+str(@pageSize)+' '+@strGetFields+' from '+@tblName+' where '+@strWhere+' '+@strOrder

else

set @strSQL = 'select top '+str(@pageSize)+' '+@strGetFields+' from '+@tblName+' '+@strOrder

--print(@strSQL)

--如果是第一页就执行以上代码，这样会加快执行速度

end

else

begin

--以下代码赋予了@strSQL以真正执行的SQL代码

set @strSQL = 'select top '+str(@pageSize)+' '+@strGetFields+' from '

+@tblName+' where '+@fldName+'' +@strTmp+ '('+@fldName+')

from (select top '+str((@pageIndex-1)*@pageSize)+' '+@fldName+'

from '+@tblName+' '+@strOrder+') as tblTmp) '+@strOrder

if @strWhere != ' '

set @strSQL = 'select top ' +str(@pageSize)+' '+@strGetFields+' from '

+@tblName+' where '+@fldName+' '+@strTmp+' ('

+@fldName+') from (select top ' +str((@pageIndex-1)*@pageSize)+' '

+@fldName+' from '+@tblName+' where ' +@strWhere+ ' '

+@strOrder+') as tblTmp) and '+@strWhere+' '+@strOrder

end

end

exec (@strSQL)

4)建立前台页面

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

<%@ Register assembly="AspNetPager" namespace="Wuqi.Webdiyer" tagprefix="webdiyer" %>

<!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>无标题页</title>

</head>

<body>

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

<div>

<asp:GridView ID="GridView1" runat="server"

Height="274px" Width="863px">

</asp:GridView>

<webdiyer:AspNetPager ID="AspNetPager1" runat="server"

CustomInfoHTML="第%CurrentPageIndex%页，共%PageCount%页，每页%PageSize%条"

FirstPageText="首页" LastPageText="尾页" LayoutType="Table" NextPageText="下一页"

onpagechanged="AspNetPager1_PageChanged" PageIndexBoxType="DropDownList"

PagingButtonLayoutType="Span" PrevPageText="上一页" ShowCustomInfoSection="Left"

ShowPageIndexBox="Always" SubmitButtonText="Go" TextAfterPageIndexBox="页"

TextBeforePageIndexBox="转到">

</webdiyer:AspNetPager>

</div>

</form>

</body>

</html>

5)建立后台页面

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

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.Xml.Linq;

using System.Configuration;

using System.Data.SqlClient;

using b2b._Class;

public partial class Pager :BaseClass

{

public string tblName = "orders";

public string strGetFields = "*";

public string fldName = "orderid";

public int pageSize = 10;

public int pageIndex;

public bool doCount = false;

public bool orderType = true;

public string strWhere = "orderid is not null";

public int jumpPage;

public string SqlConnectionStr =ConfigurationManager.ConnectionStrings["eHRCONNECTIONSTRING"].ConnectionString;

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

ViewState["pageIndex"] = 1;//保存一个为1的页面索引值到ViewState

ViewState["strWhere"] = strWhere;

gvUserDataBind();

}

}

private void gvUserDataBind()

{

pageIndex = (int)ViewState["pageIndex"];

strWhere = ViewState["strWhere"].ToString();

Class_PageHelper ph = new Class_PageHelper(this.tblName, this.strGetFields, this.fldName, this.pageSize, this.pageIndex, this.doCount, this.orderType, this.strWhere, this.SqlConnectionStr);

DataSet ds = ph.GetDataSet();

this.AspNetPager1.RecordCount = this.recordCount;

this.AspNetPager1.PageSize = this.pageSize;

DataTable dt = ds.Tables[0];

if(dt.Rows.Count == 0)

{

dt.Rows.Add(dt.NewRow());

this.GridView1.DataSource = dt;

this.GridView1.DataBind();

int columnCount = dt.Columns.Count;

this.GridView1.Rows[0].Cells.Clear();

this.GridView1.Rows[0].Cells.Add(new TableCell());

//this.GridView1.Columns[0].Visible = false;

this.GridView1.Rows[0].Cells[0].ColumnSpan = columnCount + 1;

this.GridView1.Rows[0].Cells[0].Text = "没有记录";

this.GridView1.Rows[0].Cells[0].Style.Add("text-align", "center");

this.GridView1.Rows[0].Cells[0].Style.Add("color", "red");

this.GridView1.Rows[0].Attributes.Add("ondblclick", "return false;");

}

else

{

this.GridView1.DataKeyNames = new string[] { "OrderID"};

this.GridView1.DataSource = ds;

this.GridView1.DataBind();

//this.GridView1.Columns[0].Visible = true;

}

dt.Dispose();

ds.Dispose();

}

protected void AspNetPager1_PageChanged(object sender, EventArgs e)

{

ViewState["pageIndex"] = this.AspNetPager1.CurrentPageIndex;

gvUserDataBind();

}

/// <summary>

/// 返回页总数

/// </summary>

public int pageCount

{

get

{

pageIndex = (int)ViewState["pageIndex"];

strWhere = ViewState["strWhere"].ToString();

Class_PageHelper ph = new Class_PageHelper(this.tblName, this.strGetFields, this.fldName, this.pageSize, this.pageIndex, true, this.orderType, this.strWhere, this.SqlConnectionStr);

return ph.GetPageCount();

}

}

/// <summary>

/// 返回记录总数

/// </summary>

public int recordCount

{

get

{

pageIndex = (int)ViewState["pageIndex"];

strWhere = ViewState["strWhere"].ToString();

Class_PageHelper ph = new Class_PageHelper(this.tblName, this.strGetFields, this.fldName, this.pageSize, this.pageIndex, true, this.orderType, this.strWhere, this.SqlConnectionStr);

return ph.GetRowCount();

}

}

}