IsolatedStorageFileStream Class

Aug 26, 2008
by David Cumps

Part of my 2008 study notes for exam 70-536 (.NET Framework 2.0).

Overview

Exposes a file within an isolated store (derives from FileStream).
Assembly/Machine store for application-level data.
Assembly/User store for user-level data.
File paths are relative inside a store.

Good practice

Don’t write your state to local .xml files all over the system; store it in isolated storage instead.

Examples

Using a Store

IsolatedStorageFile a = IsolatedStorageFile.GetMachineStoreForAssembly();
IsolatedStorageFileStream b = new IsolatedStorageFileStream("MyState.config", FileMode.OpenOrCreate, a);
 
StreamWriter c = new StreamWriter(b);
c.WriteLine("Hello World!");
c.Close();
 
foreach (string storeFile in a.GetFileNames("*"))
{
    Console.WriteLine(storeFile);
}
 
IsolatedStorageFileStream d = new IsolatedStorageFileStream("MyState.config", FileMode.Open, a);
 
StreamReader e = new StreamReader(d);
Console.WriteLine(e.ReadToEnd());
e.Close();