Windows Phones 7 文件操作

Windows Phones 文件操作，自己重新测试了一遍，通过，给大家参考使用。

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private const string foldername = "xu";
   private const string filename = "info.txt";
   private const string filepath = foldername +"/"+ filename;
   private const string settingname = "sname";
   /// <summary>
   /// 创建文件夹
   /// </summary>
   /// <param name="sender"></param>
   /// <param name="e"></param>
   private void button1_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file=IsolatedStorageFile.GetUserStoreForApplication())
       {
           file.CreateDirectory(foldername);
       }
   }
 //检查文件夹是否存在
   private void button2_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file=IsolatedStorageFile.GetUserStoreForApplication())
       {
           if (file.DirectoryExists(foldername))
           {
               MessageBox.Show("存在"+foldername);
           }
           else
           {
               MessageBox.Show("不存在");
           }
       }
   }
   //删除文件夹
   private void button3_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
       {
           file.DeleteDirectory(foldername);
       }
   }
 
   //创建文件
   private void button6_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
       {
         IsolatedStorageFileStream sd= file.CreateFile(filepath);
　　　//一定要记得关闭 不然有bug
         sd.Close();
       }
   }
   //判断文件是否存在
   private void button4_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
       {
           if (file.FileExists(filepath))
           {
               MessageBox.Show("存在"+filepath);
           }
           else
           {
               MessageBox.Show("不存在");
           }
       }
   }
   //删除文件操作
   private void button5_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
       {
           file.DeleteFile(filepath);
       }
   }
 
   //在文件里增加内容
   private void button7_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file=IsolatedStorageFile.GetUserStoreForApplication())
       {
           using (IsolatedStorageFileStream fs=file.OpenFile(filepath,FileMode.OpenOrCreate,FileAccess.Write))
           {
               using (StreamWriter sw = new StreamWriter(fs))
               {
                   sw.WriteLine("我爱你");
               } 
           }
       }
   }
   //读取文件内容
   private void button8_Click(object sender, RoutedEventArgs e)
   {
       using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication())
       {
           using (IsolatedStorageFileStream fs = file.OpenFile(filepath, System.IO.FileMode.OpenOrCreate, FileAccess.Read))
           {
               using (StreamReader sr=new StreamReader(fs))
               {
                   MessageBox.Show(sr.ReadToEnd());
               }
           }
       }
   }
   //保存信息配置信息
   private void button9_Click(object sender, RoutedEventArgs e)
   {
       IsolatedStorageSettings.ApplicationSettings[settingname] = "哈哈";
       IsolatedStorageSettings.ApplicationSettings.Save();
       MessageBox.Show("保存成功");
   }
   //读取程序配置信息
   private void button10_Click(object sender, RoutedEventArgs e)
   {
       if (IsolatedStorageSettings.ApplicationSettings.Contains(settingname))
       {
           MessageBox.Show(IsolatedStorageSettings.ApplicationSettings[settingname].ToString());
       }
   }