Silverlight 3.0 Isolated Storage 独立存储空间

Silverlight支持一种类似Cookie的独立存储,它是基于客户端的文件系统,每个Silverlight应用程序都被分配了自己的独立的存储空间.

这个存储空间在不同的操作系统下是不同的WindowsXP下是根据账户来分配的.一般在

C:\Document and Setting\Administrator\Local Setting\Application data\Microsoft\Silverlight\is\

我的是操作系统是win7企业版,位置在

C:\Users\Administrator\AppData\LocalLow\Microsoft\Silverlight\is\

了解了 Isolated Storge是干嘛的

接下来来介绍下怎么在程序中应用这个存储空间来操作目录和文件.

1,Isolated Storge 根据应用程序不同, 有应用程序和站点两种类型,

应用程序:IsolatedStorageFile.GetUserStoreForApplication();

站点:IsolatedStorageFile.GetUserStoreForSite();

在操作Isolated Storge 要引入using System.IO.IsolatedStorage;命名空间

2,下面就是一写代码了.大家可以复制下来看看.Go

//创建目录
       public void CreateDir(string dirName)
       {
           IsolatedStorageFile stoedFile = IsolatedStorageFile.GetUserStoreForApplication();
           stoedFile.CreateDirectory(dirName);
       }

       //列目录
       public void LoadDirs()
       {
           using (IsolatedStorageFile storeFile = IsolatedStorageFile.GetUserStoreForApplication())
           {
               var itemSource = storeFile.GetDirectoryNames("*");
           }
       }

       //删除目录
       public void DeleteDir(string dirPath)
       {
           using (IsolatedStorageFile stro = IsolatedStorageFile.GetUserStoreForApplication())
           {
               stro.DeleteDirectory(dirPath);
           }
       }

       //创建文件
       public void SaveFile(string savePath,string content)
       {
           IsolatedStorageFile storeFile = IsolatedStorageFile.GetUserStoreForApplication();
           IsolatedStorageFileStream sf = storeFile.CreateFile(savePath);
           using (StreamWriter sw = new StreamWriter(sf))
           {
               sw.WriteLine(content);
           }
           sf.Close();
       }

       //读取文件
       public void LoadFile(string readPath)
       {
           string content = string.Empty;
           using (IsolatedStorageFile storeFile = IsolatedStorageFile.GetUserStoreForApplication())
           {
               if (storeFile.FileExists(readPath))
               {
                   StreamReader sr = new StreamReader(storeFile.OpenFile(readPath,FileMode.Open,FileAccess.Read));
                   content = sr.ReadToEnd();
               }
           }
       }
       //删除文件
       public void DeleteFile(string path)
       {
           using (IsolatedStorageFile storeFile = IsolatedStorageFile.GetUserStoreForApplication())
           {
               storeFile.DeleteFile(path);
           }
       }