.net请求Webservice简单实现天气预报功能

1.新建一个网站或者web应用程序，添加一个aspx页面，用于展示天气数据。（这个应该不用细讲吧）

2.在网上找一个免费的天气预报的接口，我用的是Webxml网站的，地址如下:

http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx

3.在项目目录下，  引用  —  添加服务引用，弹出对话框，然后输入接口地址，点击前往，命名空间可以改成你想要的，如下图：

一般处理程序代码如下：

using System.Web;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
 
namespace WeatherTest.ashx
{
    /// <summary>
    /// weatherHandler 的摘要说明
    /// </summary>
    public class weatherHandler : IHttpHandler
    {
        WeatherWsClient.WeatherWSSoapClient client = new WeatherWsClient.WeatherWSSoapClient();
        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string[] result = null;
            string option = context.Request.Form["option"];
            switch (option)
            {
                case "province":
                    result = GetProvinces();
                    break;
                case "city":
                    result = GetCitys(context.Request.Form["provinceid"]);
                    break;
                case "weather":
                    result = GetWeather(context.Request.Form["cityid"], null);
                    break;
            }
            string str = ConvertToString(result, option);
 
            context.Response.Write(str);
        }
        /// <summary>
        /// 数组转字符串
        /// </summary>
        /// <param name="result"></param>
        /// <param name="option"></param>
        /// <returns></returns>
        private string ConvertToString(string[] result, string option)
        {
            StringBuilder sb = new StringBuilder();
            foreach (string item in result)
            {
                sb.Append(item+"|");
            }
            return sb.ToString();
        }
 
        /// <summary>
        /// 省份
        /// </summary>
        /// <returns></returns>
        private string[] GetProvinces()
        {
            return client.getRegionProvince();
        }
        /// <summary>
        /// 城市
        /// </summary>
        /// <param name="provinceid"></param>
        /// <returns></returns>
        private string[] GetCitys(string provinceid)
        {
            return client.getSupportCityString(provinceid);
        }
        /// <summary>
        /// 天气数据
        /// </summary>
        /// <param name="cityid"></param>
        /// <param name="userid"></param>
        /// <returns></returns>
        private string[] GetWeather(string cityid, string userid)
        {
            return client.getWeather(cityid, userid);
        }
 
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}