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解析GridView自带分页及与DropDownList结合使用

来源：安汇情感

GridView自带的分页功能实现：

要实现GrdView分页的功能

操作如下：

更改GrdView控件的AllowPaging属性为true。
更改GrdView控件的PageSize属性为任意数值（默认为10）
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：

在<<asp:GridView ID=......>后添加，OnPageIndexChanging="GridView1_PageIndexChanging"
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     
 <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。