使用WPF在磁盘上存储键/值对

Question

我想为我的WPF应用程序缓存一堆键/值对。在Silverlight中，这非常简单 - 我可以这么做：

IsolatedStorageSettings userSettings = IsolatedStorageSettings.ApplicationSettings; 
wombat = (string)userSettings["marsupial"]; 

在WPF中有这样的事吗？一个袋熊可能不是有袋动物，现在我想起它。那里需要一些工作。

编辑：我想如果我可以避免将它们序列化到/从集体，因为它们中会有大量的数据（我正在缓存网页）。

Answer 1

在.NET Framework的桌面版本中不存在IsolatedStorageSettings，它仅在Silverlight中可用。但是，您可以在任何.NET应用程序中使用IsolatedStorage;只是将Dictionary<string, object>序列化到隔离存储中的文件。

var settings = new Dictionary<string, object>(); 
settings.Add("marsupial", wombat); 

BinaryFormatter formatter = new BinaryFormatter(); 
var store = IsolatedStorageFile.GetUserStoreForAssembly(); 

// Save 
using (var stream = store.OpenFile("settings.cfg", FileMode.OpenOrCreate, FileAccess.Write)) 
{ 
    formatter.Serialize(stream, settings); 
} 

// Load 
using (var stream = store.OpenFile("settings.cfg", FileMode.OpenOrCreate, FileAccess.Read)) 
{ 
    settings = (Dictionary<string, object>)formatter.Deserialize(stream); 
} 

wombat = (string)settings["marsupial"]; 

Answer 2

如果通过WPF，你的意思是完整的.Net运行时，那么是的。有一个使用WPF项目模板创建的默认Settings类。 Settings class

Answer 3

看到这个discussion

它不会在WPF存在，但可以很容易地从Mono的月光下实施移植（http://vega.frugalware.org/tmpgit/moon/class/System.Windows/ System.IO.IsolatedStorage/IsolatedStorageSettings.cs）

//Modifications at MoonLight's IsolatedStorageSettings.cs to make it work with WPF (whether deployed via ClickOnce or not): 

// per application, per-computer, per-user 
public static IsolatedStorageSettings ApplicationSettings { 
    get { 
    if (application_settings == null) { 
     application_settings = new IsolatedStorageSettings (
     (System.Threading.Thread.GetDomain().ActivationContext!=null)? 
      IsolatedStorageFile.GetUserStoreForApplication() : //for WPF, apps deployed via ClickOnce will have a non-null ActivationContext 
      IsolatedStorageFile.GetUserStoreForAssembly()); 
    } 
    return application_settings; 
    } 
} 

// per domain, per-computer, per-user 
public static IsolatedStorageSettings SiteSettings { 
    get { 
    if (site_settings == null) { 
     site_settings = new IsolatedStorageSettings (
     (System.Threading.Thread.GetDomain().ActivationContext!=null)? 
      IsolatedStorageFile.GetUserStoreForApplication() : //for WPF, apps deployed via ClickOnce will have a non-null ActivationContext 
      IsolatedStorageFile.GetUserStoreForAssembly()); 
      //IsolatedStorageFile.GetUserStoreForSite() works only for Silverlight applications 
    } 
    return site_settings; 
    } 
} 

请注意，你也应该在代码的顶部更改#if块写

如果！SILVERLIGHT

也请看看这个custom settings storage