如何在wp 8.1中使用隔离存储

Question

如何在此代码中使用IsolatedStorage ：

private void Button_Click(object sender, RoutedEventArgs e)
    {
            textblock.Visibility = Visibility.Visible;

    }

我使用Windows Phone 8.1 Silverlight C＃

Answer 1

我假设您要存储按钮控件的状态。 那你就可以做到

if(!IsolatedStorageSettings.ApplicationSettings.Contains("ButtonVisibility"))
{
    IsolatedStorageSettings.ApplicationSettings.Add("ButtonVisibility", Visibility.Visible.ToString());
}
else
{
    IsolatedStorageSettings.ApplicationSettings["ButtonVisibility"] = Visibility.Visible.ToString());
}

这将在Windows 8和8.1上运行。 但是，如果仅以Windows 8.1为目标，则可以为Universal Apps Windows.Storage.ApplicationData.Current.LocalSettings和Windows.Storage.ApplicationData.Current.RoamingSettings使用新类。有关这些的详细信息，请参见此处 。

Answer 2

尝试使用此类实现

     public class LocalSetting
{


   public LocalSetting()
   {

   }

   public void Write(string key,string value)
   {
       try
       {
           var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
           localSettings.Values[key] = value;
       }
       catch(Exception)
       {
           MessageDialog msgbox = new MessageDialog("Erreur d'ecriture");
           msgbox.ShowAsync();
           return;

       }


   }

   public String Read(string key)
   {
       try
       {
       var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
       if(localSettings.Values.Keys.Contains(key))

      return localSettings.Values[key].ToString();
       else 
      return "";



         }
       catch(Exception)
       {
           MessageDialog msgbox = new MessageDialog("Erreur de lecture");
           msgbox.ShowAsync();
           return "";

       }
   }



}