tombstoning - saving and loadign from IsolateStorage

2026-06-29 15:01:45 +03:00 · 2011-03-25 13:47:13 +02:00
parent f069ee7010
commit a25a7fb3fd
6 changed files with 173 additions and 38 deletions
@@ -0,0 +1,60 @@
+using System;
+using System.Net;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Documents;
+using System.Windows.Ink;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Animation;
+using System.Windows.Shapes;
+using System.IO.IsolatedStorage;
+using System.IO;
+using MyFriendsAround.WP7.ViewModel;
+using System.Text;
+
+namespace MyFriendsAround.WP7.Utils
+{
+    public static class ApplicationExtensions
+    {
+
+        private static string GetIsFile(Type t)
+        {
+            return string.Concat(t.Name, ".dat");
+        }
+
+
+        public static T RetrieveFromIsolatedStorage<T>(this Application app) where T : class
+        {
+            using (var userAppStore = IsolatedStorageFile.GetUserStoreForApplication())
+            {
+                var dataFileName = GetIsFile(typeof(T));
+                if (userAppStore.FileExists(dataFileName))
+                {
+                    using(StreamReader sr =new StreamReader(userAppStore.OpenFile(dataFileName, FileMode.Open), Encoding.UTF8))
+                    {
+                        return SerializationHelper.Deserialize<T>(sr.ReadToEnd());    
+                    }
+                }
+            }
+            return null;
+        }
+
+        public static void SaveToIsolatedStorage<T>(this Application app, T model) where T : class
+        {
+            var dataFileName = GetIsFile((model.GetType()));
+            using (var userAppStore = IsolatedStorageFile.GetUserStoreForApplication())
+            {
+                if (userAppStore.FileExists(dataFileName))
+                {
+                    userAppStore.DeleteFile(dataFileName);
+                }
+                using (StreamWriter sw = new StreamWriter(userAppStore.CreateFile(dataFileName), Encoding.UTF8))
+                {
+                    sw.Write(SerializationHelper.Serialize<T>(model));
+                }
+            }
+        }
+
+    }
+}