GridView 通用分页

在项目中，遇到一个分页问题，原理很简单，但是，为了达到复用，将分页的控件和方法封装到用户控件中，这样就可以将分页的控件、代码与UI层分离。

以达到代码的复用好封装。代码清单如下：

GridViewPager.ascx前台：

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="GridViewPager.ascx.cs" Inherits="Common_GridViewPager" %>

<div style="text-align:center; width:100%;">

<asp:LinkButton ID="lnkbtnFrist" runat="server" OnClick="lnkbtnFrist_Click">首页</asp:LinkButton>

<asp:LinkButton ID="lnkbtnPre" runat="server" OnClick="lnkbtnPre_Click">上一页</asp:LinkButton>

<asp:Label ID="lblCurrentPage" runat="server"></asp:Label>

<asp:LinkButton ID="lnkbtnNext" runat="server" OnClick="lnkbtnNext_Click">下一页</asp:LinkButton>

<asp:LinkButton ID="lnkbtnLast" runat="server" OnClick="lnkbtnLast_Click">尾页</asp:LinkButton>

跳转到第

<asp:DropDownList ID="ddlCurrentPage" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">

</asp:DropDownList>

</div>

GridViewPager.ascx后台：

using System;

using System.Data;

using System.Configuration;

using System.Collections;

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;

public partial class Common_GridViewPager : System.Web.UI.UserControl

{

//属性

private GridView _MyGv;

//要分页的GridView

public GridView MyGv

get

return _MyGv;

}

set

_MyGv = value;

protected void Page_Load(object sender, EventArgs e)

if(!IsPostBack)

BindGvData();

#region 分页操作部分的代码

//绑定GridView数据

private void BindGvData()

this.MyGv.DataBind();

BindPagerDDL();

SetPagerEnable();

this.lblCurrentPage.Text = string.Format("当前第{0}页/总共{1}页", this.MyGv.PageIndex + 1, this.MyGv.PageCount);

//绑定选择页下拉菜单

private void BindPagerDDL()

this.ddlCurrentPage.Items.Clear();

for (int i = 1; i <= this.MyGv.PageCount; i++)

this.ddlCurrentPage.Items.Add(i.ToString());

this.ddlCurrentPage.SelectedIndex = this.MyGv.PageIndex;

//页码下拉列表

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

this.MyGv.PageIndex = this.ddlCurrentPage.SelectedIndex;

//首页

protected void lnkbtnFrist_Click(object sender, EventArgs e)

this.MyGv.PageIndex = 0;

//上一页

protected void lnkbtnPre_Click(object sender, EventArgs e)

if (this.MyGv.PageIndex > 0)

this.MyGv.PageIndex = this.MyGv.PageIndex - 1;

//下一页

protected void lnkbtnNext_Click(object sender, EventArgs e)

if (this.MyGv.PageIndex < this.MyGv.PageCount)

this.MyGv.PageIndex = this.MyGv.PageIndex + 1;

//尾页

protected void lnkbtnLast_Click(object sender, EventArgs e)

this.MyGv.PageIndex = this.MyGv.PageCount;

/// <summary>

/// 设置“首页、上一页、下一页、尾页”可用性

/// </summary>

private void SetPagerEnable()

//最后一页，屏蔽“尾页，下一页”

if (ddlCurrentPage.Text == this.MyGv.PageCount.ToString())

lnkbtnNext.Enabled = false;

lnkbtnLast.Enabled = false;

lnkbtnFrist.Enabled = true;

lnkbtnPre.Enabled = true;

//第一页时，屏蔽“首页，上一页”

else if (ddlCurrentPage.Text.Equals("1"))

lnkbtnNext.Enabled = true;

lnkbtnLast.Enabled = true;

this.lnkbtnFrist.Enabled = false;

lnkbtnPre.Enabled = false;

else

#endregion

asp.net web页面前台引入：

头部引入：

<%@ Register TagPrefix="userCtrl" TagName="Pager" Src="~/Common/GridViewPager.ascx" %>

在需要分页的GridView初引入：

<userCtrl:Pager runat="server" ID="MyPager" />

asp.net web页面后台引用：

private void Page_Load(object sender, System.EventArgs e)

this.MyPager.MyGv = this.GridView1;

BindGridViewData();

BindGridViewData();是绑定GridView数据源的方法。因为绑定数据源的方法可以是ADO.NET、存储过程、Linq to sql等等方法。

所以，为了达到分页的通用，将数据绑定与数据分页分离。