用ASP.NET寫的一個省份與城市的添加

來源:互聯網
上載者:User

1、用aspx寫的代碼

 

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="芬達、北京.aspx.cs" Inherits="芬達_北京" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
   
        <asp:ListBox ID="ListBox1" runat="server"
            onselectedindexchanged="ListBox1_SelectedIndexChanged"
            SelectionMode="Multiple" Width="102px">
        </asp:ListBox>
        <br />
        <br />
   
    </div>
    <asp:DropDownList ID="DropDownList1" runat="server"
        onselectedindexchanged="DropDownList1_SelectedIndexChanged">
        <asp:ListItem Value="1">河北</asp:ListItem>
        <asp:ListItem Value="2">河南</asp:ListItem>
    </asp:DropDownList>
    <br />
    <br />
    <asp:Button ID="Button1" runat="server" Text="選擇" />
    </form>
</body>
</html>

 

 

 

 

 

2、用aspx.cs寫的內容

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

public partial class 芬達_北京 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)//提交進入時的判斷,第一次載入時進入
        {
            ListItem li=new ListItem("北京","3");
            DropDownList1.Items.Add(li);
        }
    }
    protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
            }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedItem.Text == "河北")
        {
            ListBox1.Items.Clear();
            ListItem li = new ListItem("石家莊","1");
            ListBox1.Items.Add(li);
            li = new ListItem("保定", "2");
            ListBox1.Items.Add(li);
        }
        else if (DropDownList1.SelectedItem.Text == "河南")
        {
            ListBox1.Items.Clear();
            ListItem li = new ListItem("鄭州", "1");
            ListBox1.Items.Add(li);
            li = new ListItem("周口", "2");
            ListBox1.Items.Add(li);
        }
        else if (DropDownList1.SelectedItem.Text == "北京")
        {
            ListBox1.Items.Clear();
            ListItem li = new ListItem("東城區", "1");
            ListBox1.Items.Add(li);
            li = new ListItem("西城區", "2");
            ListBox1.Items.Add(li);
        }
    }
}

 

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