Silverlight 独立存储（IsolatedStorageFile）

1.在Web中添加天气服务引用地址

http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl

2.在Web中添加Wcf服务接口IWeatherService.cs

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.Serialization;
 using System.ServiceModel;
 using System.Text;

 namespace EasySL.Web.WCF
 {
     // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的接口名“IWeatherService”。
     [ServiceContract]
     public interface IWeatherService
     {
         [OperationContract]
         string[] GetCityWeather(string CityName);
     }
 }

3.在Web中实现服务接口

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.Serialization;
 using System.ServiceModel;
 using System.Text;

 namespace EasySL.Web.WCF
 {
     // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码、svc 和配置文件中的类名“WeatherService”。
     // 注意: 为了启动 WCF 测试客户端以测试此服务，请在解决方案资源管理器中选择 WeatherService.svc 或 WeatherService.svc.cs，然后开始调试。
     public class WeatherService : IWeatherService
     {
         public string[] GetCityWeather(string CityName)
         {
             ServiceRefWeather.WeatherWebServiceSoapClient client = new ServiceRefWeather.WeatherWebServiceSoapClient("WeatherWebServiceSoap");
             string[] cityNameWeather = client.getWeatherbyCityName(CityName);
             return cityNameWeather;
         }
     }
 }

4.在client添加自己创建的Wcf服务地址、调用服务接口

/// <summary>
        /// 通过wcf获取天气数据信息
        /// </summary>
        private void InitDataWeather()
        {
            try
            {
                ServiceReference1.WeatherServiceClient client = new ServiceReference1.WeatherServiceClient();
                client.GetCityWeatherCompleted += (s, e) =>
                {
                    try
                    {
                        if (e.Error == null)
                        {
                            string[] cityWeather = new string[e.Result.Count];
                           讲e.Result结果显示在页面中就ok了，然后我们将e.Result进行数据格式处理，运用独立存储讲结果保存起来                         }
                        else
                        {
                            lbltitle1.Content = e.Error.Message;
                        }
                    }
                    catch (Exception ex)
                    {
                        lbltitle1.Content = ex.Message;
                    }

                };
                client.GetCityWeatherAsync("北京");
            }
            catch (Exception ex)
            {
                //lbltitle1.Content = ex.Message;
            }

        }    

5.将数据结果存放到本地（运用独立存储技术）

  private void WeatherWriterIsolatedStorageFile(string str)
         {
             IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
             if (isf.FileExists("Weather.txt"))
             {
                 isf.DeleteFile("Weather.txt");
             }
             using (Stream stream = isf.CreateFile("Weather.txt"))
             {
                 using (StreamWriter writer = new StreamWriter(stream))
                 {
                     writer.WriteLine(str);
                 }
             }
         }

6.读取存放的数据结果（独立存储）

 private void ReaderWeatherIsolatedStorageFile()
        {
            IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication();
            if (isf.FileExists("AppConfig/Weather.txt"))
            {
                using (Stream stream = isf.OpenFile("Weather.txt", FileMode.Open))
                {
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        string[] line = reader.ReadToEnd().Split('|');
                     }
                }
                isf.DeleteFile("Weather.txt");
            }
            else
            {
                InitDataWeather();
            }
        }