AspNetPager分页控件使用

[align=left]GridView、DataList和Repeater分页功能是我们在项目开发中经常遇到的。GridView也自带分页功能，但让人总觉得不是特别完善，如果你也懒得自己去写一些复杂的分页功能，那么你可以使用别人写好的分页控件。下面以AspNetPager为例：
一、添加AspNetPager.dll引用：[/align]
[align=left] 1.新建一个“网站”。
2.在“解决方案资源管理器”选中网站根目右键“添加引用”，在“浏览”选项中找到添加引用的“AspNetPager.dll”文件。[/align]
[align=left]3.在“工具箱”右键单击“选择项”添加“AspNetPager.dll”文件，完成后，分页控件的图标就出现在工具栏。[/align]
[align=left]二、页面设计:
[/align]
[align=left] 1.打开“Default.aspx”页面，在工具栏里拖一个GridView放在页面上，然后把分页控件拖到GridView下.切换到“源视图”在<webdiyer:aspnetpager ......></webdiyer:aspnetpager>可以设置一些属性来控制分页控件样式（具体属性可参考：http://www.webdiyer.com/AspNetPager/docs/index.html）。[/align]
[align=left] 2.web.config:
<appSettings>
<add key="Conn" value="server=(local);database=test1;user id=sa;pwd=19830714"/>
</appSettings>[/align]
[align=left] 3.数据访问层：
using System;
using System.Data;
using System.Configuration;
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;
/// <summary>
/// DataBase 的摘要说明
/// </summary>
namespace DataAccessLayer
{
public class DataBase:IDisposable
{
protected SqlConnection Connection ;
protected string ConnectionString;[/align]
[align=left] /// <summary>
/// 默认构造函数
/// </summary>
public DataBase()
{
ConnectionString = ConfigurationManager.AppSettings["Conn"];
}[/align]
[align=left] /// <summary>
/// Dispose方法，释放建立连接时占用的资源
/// </summary>
public void Dispose()
{
if(Connection!=null)
{
Connection.Dispose();
Connection = null;
}
}[/align]
[align=left] /// <summary>
/// 析构函数，关闭连接释放资源
/// </summary>
~DataBase()
{
try
{
if(Connection!=null)
{
Connection.Close();
}
}
catch
{ }
try
{
Dispose();
}
catch
{ }
}[/align]
[align=left] /// <summary>
/// Open方法打开连接
/// </summary>
public void Open()
{
if(Connection==null)
{
Connection = new SqlConnection(ConnectionString);
}
if(Connection.State.ToString()=="Closed")
{
Connection.Open();
}
}[/align]
[align=left] /// <summary>
/// Close方法关闭连接
/// </summary>
public void Close()
{
if(Connection!=null)
{
Connection.Close();
}
}[/align]
[align=left] /// <summary>
/// GetDataSet方法
/// </summary>
/// <param name="SqlStrings">SQL语句</param>
/// <param name="Pager1">当前记录数</param>
/// <param name="Pager2">每页显示记录数</param>
/// <param name="TableName">表名</param>
/// <returns>DataSet</returns>
public DataSet GetDataSet(string SqlStrings, int Pager1, int Pager2, string TableName)
{
Open();
SqlDataAdapter sda = new SqlDataAdapter(SqlStrings, Connection);
DataSet ds = new DataSet();
sda.Fill(ds, Pager1, Pager2, TableName);
return ds;
Close();
}[/align]
[align=left] /// <summary>
/// ExecuteScalar方法，接受一个SQL语句，返回首行首列值
/// </summary>
/// <param name="SqlStrings">SQL语句</param>
/// <returns>返回首行首列值</returns>
public string ExecuteScalar(string SqlStrings)
{
Open();
string count="";
try
{
SqlCommand cmd = new SqlCommand(SqlStrings,Connection );
count = cmd.ExecuteScalar().ToString();
}
catch
{ }
finally
{
Close();
}
return count;
}
}[/align]
[align=left]}
4.业务逻辑层：
using System;
using System.Data;
using System.Configuration;
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 DataAccessLayer;[/align]
[align=left]/// <summary>
/// Pager 的摘要说明
/// </summary>
namespace BussinessLogicLayer
{
public class Pager
{
public Pager()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// GridViewDataSet方法，返回一个DataSet
/// </summary>
/// <param name="Pager1">当前记录数</param>
/// <param name="Pager2">每页显示记录数</param>
/// <param name="TableName">表名</param>
/// <returns>DataSet</returns>
public DataSet GridViewDataSet(int Pager1, int Pager2, string TableName)
{
DataBase db = new DataBase();
string sql = "select * from Customer order by Customer_CreateTime desc";
DataSet ds = db.GetDataSet(sql, Pager1, Pager2, TableName);
return ds;
}[/align]
[align=left] /// <summary>
/// GetCount方法，返回表中记录数
/// </summary>
/// <returns>返回表中记录数</returns>
public int GetCount()
{
int count = 0;
DataBase db = new DataBase();
string sql = "select count(*) from Customer";
count = Convert .ToInt32(db.ExecuteScalar(sql));
return count;
}
}
}
5.表示层：Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
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.Collections.Generic;
using System.Data.SqlClient;
using BussinessLogicLayer;[/align]
[align=left]public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Pager pager=new Pager ();
this.AspNetPager1.RecordCount = pager.GetCount();//总记录数[/align]
[align=left] if(!Page.IsPostBack)
{
GridViewBind();
}
}[/align]
[align=left] public void GridViewBind()
{
Pager pager = new Pager();
int Pager1 = AspNetPager1.PageSize * (AspNetPager1.CurrentPageIndex-1);
int Pager2 = AspNetPager1.PageSize;
DataSet ds = pager.GridViewDataSet(Pager1, Pager2, "Customer");[/align]
[align=left] GridView1.DataSource = ds.Tables["Customer"];
GridView1.DataBind();[/align]
[align=left] //显示记录信息
AspNetPager1.CustomInfoHTML = "记录总数：" + AspNetPager1.RecordCount.ToString() + "";
AspNetPager1.CustomInfoHTML += " 总页数：" + AspNetPager1.PageCount.ToString() + "";
AspNetPager1.CustomInfoHTML += " 当前页：" + AspNetPager1.CurrentPageIndex.ToString() + "";
}[/align]
[align=left] protected void AspNetPager1_PageChanged(object src, EventArgs e)
{//PageChanged事件
GridViewBind();
}

}[/align]