isolatedstorage

问题 hey. I'm reading an image from Isolated Storage when the user clicks on an item like this: using (IsolatedStorageFile currentIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication()) { using (var img = currentIsolatedStorage.OpenFile(fileName, FileMode.Open)) { byte[] buffer = new byte[img.Length]; imgStream = new MemoryStream(buffer); //read the imagestream into the byte array int read; while ((read = img.Read(buffer, 0, buffer.Length)) > 0) { img.Write(buffer, 0, read); } img

问题 I need to find the way to save images to the IsolatedStorage and show them I the Silverlight (XAML) Important: Silverlight have to take image “himself”, I cannot set the image from the code behind I have tried many solutions before. The very last solution is, to bind byte array and convert them to the Image XAML StackPanel Orientation="Horizontal" Margin="0,0,0,20"> <Image Width="110" CacheMode="BitmapCache" Source="{Binding ThumbLocal,Converter={StaticResource imgConverter}}" Margin="12,0,9

问题 I'm creating two objects and assign them with a data from IsolatedStorage . But when I change one object the second one changes too. ( I think the problem may be the pointers are the same, but I can't solve it. ) private ArrayOfClsSimpleData lstUsers; private ArrayOfClsSimpleData tmpLstUsers; in class' globals tmpLstUsers = IsolatedStorageHelper.GetObject<ArrayOfClsSimpleData>("users"); lstUsers = IsolatedStorageHelper.GetObject<ArrayOfClsSimpleData>("users"); The first status of the arrays:

问题 Does the IsolatedStorageSettings.Save method in a Windows Phone application save the whole dictionary regardless of the changes we made in it? I.e. if we have say 50 items in it, and change just one, does the Save method saves (serializes, etc) the whole dictionary again and again? Is there any detailed documentation on this class and does anybody know what data storage format is used "under the hood"? 回答1: I've managed to find the implementation of the IsolatedStorageSettings.Save method in

问题 Does the IsolatedStorageSettings.Save method in a Windows Phone application save the whole dictionary regardless of the changes we made in it? I.e. if we have say 50 items in it, and change just one, does the Save method saves (serializes, etc) the whole dictionary again and again? Is there any detailed documentation on this class and does anybody know what data storage format is used "under the hood"? 回答1: I've managed to find the implementation of the IsolatedStorageSettings.Save method in

问题 Below are the codes to allow the user to read a File. How to allow the user to select only 1 file to read? private void button3_Click(object sender, RoutedEventArgs e) { ViewDiskModel model = this.ContentPanel.DataContext as ViewDiskModel; if (model.Files.Any(file => file.IsChecked)) { model.ReadSelectedFiles.Execute(null); NavigationService.Navigate(new Uri("/AnswerQuestionPage.xaml", UriKind.Relative)); } else if ((model.Files.Any(file => file.IsChecked)) > 1) { MessageBox.Show("Please

问题 I am developing a Windows Phone 8 application but am having a lot of issues with file access permission exceptions hindering the approval of my application when ever I try accessing files in the "local" folder (this only happens after the application has been signed by the WP store, not when deployed from Visual Studio). To solve this I have moved all file operations to IsolatedStorage and this seems to have fixed the problems. I only have one problem left though. My application needs to make

问题 i have a problem when i want get list of file in a directory this is my code try { using (var store = IsolatedStorageFile.GetUserStoreForApplication()) { StringBuilder sb = new StringBuilder(); string subDir = Path.Combine("NotesYours", "Notes"); if (store.DirectoryExists(subDir)) { string searchPath = Path.Combine(subDir, "*"); string[] fileInSubDir = store.GetFileNames(searchPath); tbtbtes.Text = fileInSubDir.Length.ToString(); } else { MessageBox.Show("dir not exist"); } } } catch

问题 So I've been working on a simple game and I wanted to implement a highscore system. Once the player loads up the main page for the first time a new text file is created ("hsc.txt") and some fake values are inserted which are later on split up by the program, however, currently my code throws a System.IO.IsolatedStorage.IsolatedStorageException and I can't seem to find the problem. I've looked up the error that I got from the message box which was " - operation not permitted " but all the

问题 I'm working on an app that is going to store some favourites information that the user has added. I want to store two pieces of information for each favourite - a number and a piece of text. So it will be something like this: 123 Some text 1234 Some more text 1233 More text And so on. The number will be unique so it should be fine to use as a key and I will need to have this number stored separately anyway in order to use it to query some data. What is the best way to store this data on