天气预报（asp.net web form）

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我用的是 http://www.webxml.com.cn/WebServices/WeatherWebService.asmx 这个web服务，挺简单的，

用兴趣的同学可以先到看看http://www.webxml.com.cn/WebServices/WeatherWebService.asmx这个网站，

然后添加一个web引用

具体代码如下：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WeatherTEst1.WebForm1" %><!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>        <p>        省份：        <asp:DropDownList ID="DropDownListProvince" runat="server" AutoPostBack="True"             onselectedindexchanged="DropDownListProvince_SelectedIndexChanged">        </asp:DropDownList>        城市：        <asp:DropDownList ID="DropDownListCity" runat="server">        </asp:DropDownList>        <asp:Button ID="Button1" runat="server" Text="查天气" onclick="Button1_Click" />    </p>                   <p>         <asp:Label ID="LabelToday" runat="server" Text="---"></asp:Label>     </p>     <p>         <asp:Label ID="LabelTomorrow" runat="server" Text="---"></asp:Label>     </p>     <p>         <asp:Label ID="LabelAfterTomorrow" runat="server" Text="---"></asp:Label>     </p>    </div>    </form></body></html>

后台代码：

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;namespace WeatherTEst1{    public partial class WebForm1 : System.Web.UI.Page    {        //page  laod        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                BindProvinceName();            }        }        ServiceReference1.WeatherWebServiceSoapClient client = new ServiceReference1.WeatherWebServiceSoapClient("WeatherWebServiceSoap");        protected void BindCityName(string province)        {            this.DropDownListCity.Items.Clear();            foreach (string item in client.getSupportCity(province))            {                this.DropDownListCity.Items.Add(item);            }        }        protected void BindProvinceName()        {            foreach (string item in client.getSupportProvince())            {                this.DropDownListProvince.Items.Add(item);            }        }        protected void DropDownListProvince_SelectedIndexChanged(object sender, EventArgs e)        {            BindCityName(this.DropDownListProvince.SelectedItem.Text);        }        protected void Button1_Click(object sender, EventArgs e)        {            string code = this.DropDownListCity.SelectedItem.Text;            int index = code.IndexOf('(');            code = code.Substring(index+1, 5);            string [] allInfo = client.getWeatherbyCityName(code);            this.LabelToday.Text = allInfo[10];            this.LabelTomorrow.Text = allInfo[6];            this.LabelAfterTomorrow.Text = allInfo[13];        }    }//end   class}

可能这里写的不清晰，推荐另一篇博文： http://www.cnblogs.com/lzhp/archive/2013/01/13/2858559.html

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