GridView总结一：GridView自带分页及与DropDownList结合使用

GridView自带的分页功能实现：

要实现GrdView分页的功能
操作如下：
1、更改GrdView控件的AllowPaging属性为true。
2、更改GrdView控件的PageSize属性为任意数值（默认为10）
3、更改GrdView控件的PageSetting->Mode为Numeric等（默认为Numeric）该属性为分页样式。
GridView属性设置好了，从页面上也能看到分页样式。

现在开始实现分页的功能：

1、在<<asp:GridView ID=......>后添加，OnPageIndexChanging="GridView1_PageIndexChanging"
2、在对应的aspx.cs中添加：
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        InitPage(); //重新绑定GridView数据的函数
    }

参考代码：

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
            AutoGenerateColumns="False" DataKeyNames="ID" PagerSettings-Mode="Numeric"
            OnRowDataBound="GridView1_RowDataBound" PageSize="5" OnPageIndexChanging="GridView1_PageIndexChanging">
            <Columns>
                <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True"
                    SortExpression="ID" />
                <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
                <asp:BoundField DataField="Stock" HeaderText="Stock" SortExpression="Stock" />
            </Columns>
        </asp:GridView>
        每页显示<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
            <asp:ListItem>5</asp:ListItem>
            <asp:ListItem>10</asp:ListItem>
            <asp:ListItem>15</asp:ListItem>
        </asp:DropDownList>
        条记录 &nbsp; &nbsp; 
        <asp:Label ID="lblMsg" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>

后台代码：

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

public partial class gridview_zidaifenye : System.Web.UI.Page
{
    DBAccess db = new DBAccess();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            // gvProduct.DataSource = getData();
            // gvProduct.DataBind();
            BindGrid();
        }
    }
    public void BindGrid()
    {
        SqlCommand comm = db.CreateCommand("select * from product p,Uuser u where p.userid=u.id");
        SqlDataAdapter sda = new SqlDataAdapter();
        sda.SelectCommand = comm;
        DataSet ds = new DataSet();
        sda.Fill(ds,"Datatable");
        DataView dv = ds.Tables[0].DefaultView;

        GridView1.DataSource = dv;
        GridView1.DataBind();
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        GridView1.PageSize = int.Parse(DropDownList1.SelectedValue);
        GridView1.PageIndex = 0;
        BindGrid(); //GridView1.DataBind();
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        lblMsg.Text = "当前页为第" + (GridView1.PageIndex + 1).ToString() + "页，共" + (GridView1.PageCount).ToString() + "页";
    }

    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = ((GridViewPageEventArgs)e).NewPageIndex;
        BindGrid(); //重新绑定GridView数据的函数
    }
}

总结下，方便以后用到。