asp.net自定义分页控件示例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace IOCS.WEB.UserControl
{
public partial class Pagination : System.Web.UI.UserControl
{
public event EventHandler PageButtonClick;
public bool FirstPost = false;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{

}
// 只輸入數字
txtpage.Attributes.Add("onclick",
@"if(!((event.keyCode>=48&&event.keyCode<=57)
||(event.keyCode>=96&&event.keyCode<=105)
||(event.keyCode==8)))event.returnValue=false;"
);

}
GridView _gv;

/// <summary>
/// 需要分頁的GridView
/// </summary>
public GridView TargetControlID
{
set
{
_gv = value;
}
get
{
return _gv;
}
}

protected void PagerButtonClick(object sender, EventArgs e)
{
//獲得linkebutton的參數值
string arg = ((LinkButton)sender).CommandArgument;
switch (arg)
{
case ("next"):
{
if (_gv.PageIndex < _gv.PageCount – 1)
{
_gv.PageIndex=_gv.PageIndex+1;
}
break;
}
case ("prev"):
{
if (_gv.PageIndex > 0)
{
_gv.PageIndex–;
}
break;
}
case ("first"):
{
_gv.PageIndex = 0;
break;
}
case ("last"):
{
if (_gv.PageCount > 0)
{
_gv.PageIndex = _gv.PageCount – 1;
}
break;
}

default:
{
_gv.PageIndex = Convert.ToInt32(arg);
break;
}
}
PageButtonClick(sender, e);

}

public void SetPageButton()
{
if (_gv.PageIndex == 0)
{
LinkFirst.Enabled = false;
LinkPrevious.Enabled = false;

LinkFirst.Style["color"] = "gray";
LinkPrevious.Style["color"] = "gray";

object s = LinkFirst.Style.Keys;
if (_gv.PageCount > 1)
{
LinkNext.Enabled = true;
LinkLast.Enabled = true;
txtpage.Enabled = true;
txtpage.Enabled = true;
LinkNext.Style["color"] = "#000";
LinkLast.Style["color"] = "#000";
txtpage.Style["readonly"] = "false";
}
else
{
LinkNext.Enabled = false;
LinkLast.Enabled = false;
txtpage.Enabled = false;
LinkNext.Style["color"] = "gray";
LinkLast.Style["color"] = "gray";
txtpage.Style["readonly"] = "true";//background-color
}
}
else if (_gv.PageIndex == _gv.PageCount – 1)
{
LinkFirst.Enabled = true;
LinkPrevious.Enabled = true;
LinkNext.Enabled = false;
LinkLast.Enabled = false;
LinkFirst.Style["color"] = "#000";
LinkPrevious.Style["color"] = "#000";
LinkNext.Style["color"] = "gray";
LinkLast.Style["color"] = "gray";
}
else
{
LinkFirst.Enabled = true;
LinkPrevious.Enabled = true;
LinkNext.Enabled = true;
LinkLast.Enabled = true;
LinkFirst.Style["color"] = "#000";
LinkPrevious.Style["color"] = "#000";
LinkNext.Style["color"] = "#000";
LinkLast.Style["color"] = "#000";
}
}

/// <summary>
/// 設定頁面信息
/// </summary>
/// <param name="dsCount">DataSet的紀錄總數</param>

public void SetPageRecord(int dsCount)
{
LRecords.Text = dsCount.ToString();
int mod= dsCount%_gv.PageSize;
LPages.Text = (mod == 0 ? dsCount / _gv.PageSize : dsCount / _gv.PageSize + 1).ToString();
LPage.Text = (_gv.PageIndex + 1).ToString();
tbPage.Visible = true;
SetPageButton();
}

protected void txtpage_TextChanged(object sender, EventArgs e)
{
if (txtpage.Text != "")
{
try
{
int index = int.Parse(txtpage.Text.Trim());
if (index <= _gv.PageCount && index >= 1)
{
_gv.PageIndex = index – 1;
}
else
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "Script", "<script. language='javascript'>alert('對不起，頁數超過索引范圍!');</script>");
}
}
catch
{

Page.ClientScript.RegisterStartupScript(this.GetType(), "Script", "<script. language='javascript'>alert('對不起，只能輸入數字!');</script>");
}
}
PageButtonClick(sender, e);
}
}
}