解析GridView自带分页及与DropDownList结合使用

2024-07-10 13:31:51

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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。

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