二、设计并部署WebService
1、建立一个名为WeatherService的WebService，并将QQ的天气服务转为XML WebService服务，部署在一台具有固定IP的服务器上。
2、新建一个WeatherDataSet.XSD，存储我们的天气信息
＜?xml version="1.0" encoding="utf-8" ?＞
＜xs:schema id="WeatherDataSet" targetNamespace="Ezhi.Services.WeatherService" elementFormDefault="qualified"
attributeFormDefault="qualified" xmlns="Ezhi.Services.WeatherService" xmlns:mstns="Ezhi.Services.WeatherService"
xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"＞
＜xs:element name="WeatherDataSet" msdata:IsDataSet="true"＞
＜xs:complexType＞
＜xs:choice maxOccurs="unbounded"＞
＜xs:element name="WeatherDS"＞
＜xs:complexType＞
＜xs:sequence＞
＜xs:element name="CityName" type="xs:string" minOccurs="0" /＞
＜xs:element name="Date1" type="xs:string" minOccurs="0" /＞
＜xs:element name="Weather1" type="xs:string" minOccurs="0" /＞
＜xs:element name="Temp1" type="xs:string" minOccurs="0" /＞
＜xs:element name="WindPower1" type="xs:string" minOccurs="0" /＞
＜xs:element name="Date2" type="xs:string" minOccurs="0" /＞
＜xs:element name="Weather2" type="xs:string" minOccurs="0" /＞
＜xs:element name="Temp2" type="xs:string" minOccurs="0" /＞
＜xs:element name="WindPower2" type="xs:string" minOccurs="0" /＞
＜/xs:sequence＞
＜/xs:complexType＞
＜/xs:element＞
＜/xs:choice＞
＜/xs:complexType＞
＜/xs:element＞
＜/xs:schema＞ |
3、WeatherService的源代码如下
#region Using directives
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
using System.IO;
using System.Net;
using System.Text;
#endregion
namespace WeatherService
{
/// ＜summary＞
/// Service1 的摘要说明。
/// ＜/summary＞
[WebService(Description="WeatherService 天气Service",Namespace="WeatherService")]
public class Weather : System.Web.Services.WebService
{
#region Variable
private string tommorow;
#endregion |
#region 构造函数
public Weather()
{
InitializeComponent();
if(DateTime.Today.AddDays(1).Month.ToString().Length == 1)
{
tommorow= "0"+DateTime.Today.AddDays(1).Month.ToString()+"月" +
DateTime.Today.AddDays(1).Day.ToString()+"日";
}
else
{
tommorow= DateTime.Today.AddDays(1).Month.ToString()+"月" +
DateTime.Today.AddDays(1).Day.ToString()+"日";
}
}
#endregion |
#region 组件设计器生成的代码
//Web 服务设计器所必需的
private IContainer components = null;
/// ＜summary＞
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// ＜/summary＞
private void InitializeComponent()
{}
/// ＜summary＞
/// 清理所有正在使用的资源。
/// ＜/summary＞
protected override void Dispose( bool disposing )
{
if(disposing && components != null)
{
components.Dispose();
}
base.Dispose(disposing);
}
#endregion
#region [OK] GetWeatherDataSet 天气预报
[WebMethod(Description="天气预报")]
public DataSet GetWeatherDataSet(string cityName)
{
string url=@"http://appnews.qq.com/cgi-bin/news_qq_search";
string weatherData="";
try
{
weatherData = GetPage(url,cityName).Replace(" ","").Trim();
}
catch(Exception)
{
throw new Exception("对不起，没有这个城市的天气信息！");
}
//System.Diagnostics.Trace.WriteLine( tommorow );
//System.Diagnostics.Trace.WriteLine( weatherData );
WeatherDataSet weatherDs = new WeatherDataSet();
weatherDs.WeatherDS.AddWeatherDSRow(GetWeatherRow(ref weatherDs,weatherData,cityName) );
return weatherDs;
}
private WeatherDataSet.WeatherDSRow GetWeatherRow(ref WeatherDataSet weatherDs,string weatherData,string cityName)
{
WeatherDataSet.WeatherDSRow weatherRow = weatherDs.WeatherDS.NewWeatherDSRow();
weatherRow.CityName = weatherData.Substring(weatherData.IndexOf("●")+1,cityName.Length);
weatherRow.Date1 = DateTime.Now.ToLongDateString();
weatherRow.Weather1 = weatherData.Substring(weatherData.IndexOf("天气")+"天气".Length,weatherData.IndexOf("气温")-(weatherData.IndexOf("天气")+"天气".Length));
weatherRow.Temp1 = weatherData.Substring(weatherData.IndexOf("气温")+"气温".Length,weatherData.IndexOf("风力")-(weatherData.IndexOf("气温")+"气温".Length)).Replace("℃-","℃/");
weatherRow.WindPower1 = weatherData.Substring(weatherData.IndexOf("风力")+"风力".Length,weatherData.IndexOf(tommorow)-(weatherData.IndexOf("风力")+"风力".Length));
weatherRow.Date2 = DateTime.Today.AddDays(1).ToLongDateString();
weatherRow.Weather2 = weatherData.Substring(weatherData.LastIndexOf("天气")+"天气".Length,weatherData.LastIndexOf("气温")-(weatherData.LastIndexOf("天气")+"天气".Length));
weatherRow.Temp2 = weatherData.Substring(weatherData.LastIndexOf("气温")+"气温".Length,weatherData.LastIndexOf("风力")-(weatherData.LastIndexOf("气温")+"气温".Length)).Replace("℃-","℃/");
weatherRow.WindPower2 = weatherData.Substring(weatherData.LastIndexOf("风力")+"风力".Length);
return weatherRow;
}
#endregion
#region GetPageString 获取QQ的天气服务
//private string xx="";
[WebMethod(Description="天气预报")]
public string GetPageString(string cityName)
{
string url=@"http://appnews.qq.com/cgi-bin/news_qq_search";
return GetPage(url,cityName);
}
private static string GetPage(string url,string cityName)
{
HttpWebResponse res = null;
string strResult = "";
try
{
string postData = "city=" + HttpUtility.UrlEncode(cityName,System.Text.Encoding.GetEncoding("GB2312"));
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.KeepAlive = true;
req.ContentType = "application/x-www-form-urlencoded";
StringBuilder UrlEncoded = new StringBuilder();
byte[] SomeBytes = Encoding.ASCII.GetBytes(postData);
req.ContentLength = SomeBytes.Length;
Stream newStream = req.GetRequestStream();
newStream.Write(SomeBytes, 0, SomeBytes.Length);
newStream.Close();
//获得流内容
res = (HttpWebResponse)req.GetResponse();
System.IO.Stream s=res.GetResponseStream();
StreamReader reader = new StreamReader(s,System.Text.Encoding.Default);
strResult=reader.ReadToEnd();
}
catch(Exception e)
{
strResult = e.ToString();
}
finally
{
if ( res != null )
{
res.Close();
}
}
strResult=strResult.Remove(0,strResult.IndexOf("●"));
if( cityName != "北京" )
{
strResult=strResult.Remove(strResult.IndexOf("北京"),strResult.Length-strResult.IndexOf("北京"));
}
else
{
strResult=strResult.Remove(strResult.LastIndexOf("北京"),strResult.Length-strResult.LastIndexOf("北京"));
}
strResult=strResult.Trim();
while(strResult.IndexOf(@"＜") != -1)
{
strResult=strResult.Remove(strResult.IndexOf(@"＜"),strResult.IndexOf(@"＞")-strResult.IndexOf(@"＜")+1);
}
while(strResult.IndexOf(@" ") != -1)
{
strResult=strResult.Replace(" ","");
}
string x = Encoding.UTF8.GetString(new Byte[]{10});
string y = Encoding.UTF8.GetString(new Byte[]{9});
while(strResult.IndexOf(x) != -1)
{
strResult=strResult.Replace(x,"");
}
while(strResult.IndexOf(y) != -1)
{
strResult=strResult.Replace(y,"");
}
return strResult;
}
#endregion
}
} |
记得将在Web.Config文件加入以下节点，使得WebService能被外部访问
＜!-- WebService 获取的途径 --＞
＜webServices＞
＜protocols＞
＜add name="HttpSoap"/＞
＜add name="HttpPost"/＞
＜add name="HttpGet"/＞
＜add name="HttpPostLocalhost"/?
＜add name="Documentation"/＞
＜/protocols＞
＜/webServices＞ |
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