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{ public partial class MainPage : UserControl { private IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings; private string setting = "MySettings"; private string FormDataFileName = "FormFields.data"; private string FormDataDirectory = "FormData"; public MainPage() { InitializeComponent(); } private void UserControl_Loaded(object sender, RoutedEventArgs e) { try { if (settings.Keys.Count != 0) { settingTextData.Text = settings[setting].ToString(); } } catch (IsolatedStorageException ex) { settingTextData.Text = "Error saving setting: " + ex.Message; } } private void SaveFormData_Click(object sender, RoutedEventArgs e) { try { using (var store = IsolatedStorageFile.GetUserStoreForApplication()) { //Use to control loop for finding correct number of textboxes int TotalFields = 4; StringBuilder formData = new StringBuilder(50); for (int i = 1; i <= TotalFields; i++) { TextBox tb = FindName("Field" + i.ToString()) as TextBox; if (tb != null) formData.Append(tb.Text); //If on last TextBox value, don't add "|" character to end of data if (i != TotalFields) formData.Append("|");

In the architecture of MVC, the presentation layer and business logic is separated into viewer and controller. The communication between these two is frequent, since the controller needs to render data into the viewer or get data from the viewer. Besides, the viewer has to invoke the methods defined in controller to respond to users actions. Thus, to make the interaction between viewer and controller simple, we should satisfy the following two conditions while building this application: The viewer can easily invoke methods defined in the controller. The controller can easily render or get data from the viewer.

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} store.CreateDirectory(FormDataDirectory); IsolatedStorageFileStream fileHandle = store.CreateFile(System.IO.Path.Combine( FormDataDirectory, FormDataFileName)); using (StreamWriter sw = new StreamWriter(fileHandle)) { sw.WriteLine(formData); sw.Flush(); sw.Close(); } } } catch (IsolatedStorageException ex) { settingTextData.Text = "Error saving data: " + ex.Message; } } private void ReadFormData_Click(object sender, RoutedEventArgs e) { using (var store = IsolatedStorageFile.GetUserStoreForApplication()) { //Load form data using private string values for directory and filename string filePath = System.IO.Path.Combine(FormDataDirectory, FormDataFileName); //Check to see if file exists before proceeding if (store.FileExists(filePath)) { using (StreamReader sr = new StreamReader( store.OpenFile(filePath, FileMode.Open, FileAccess.Read))) { string formData = sr.ReadLine(); //Split string based on separator used in SaveFormData method string[] fieldValues = formData.Split('|'); for (int i = 1; i <= fieldValues.Count(); i++) { //Use the FindName method to loop through TextBoxes TextBox tb = FindName("Field" + i.ToString()) as TextBox; if (tb != null) tb.Text = fieldValues[i - 1]; } sr.Close(); } }

} } private void ButtonUpdateSetting(object sender, RoutedEventArgs e) { try { settings[setting] = settingTextData.Text; } catch (IsolatedStorageException ex) { settingTextData.Text = "Error reading setting: " + ex.Message; } } } }

} } } //handle the Save button private void btnSave_Click(object sender, RoutedEventArgs e) { if (NetworkOn) { //use the WCF proxy NoteManagerClient client = new NoteManagerClient(); client.AddNoteCompleted += new EventHandler<AsyncCompletedEventArgs>((s, a) => { //refresh the treeview RefreshNotesView(); }); //add the new/updated note to the server client.AddNoteAsync(CurrentNote); } else { //use the local note manager LocalNoteManagerClient client = new LocalNoteManagerClient(); //add the note client.AddNote(CurrentNote); //refresh the tree view RefreshNotesView(); } } //handle the New Button private void btnNew_Click(object sender, RoutedEventArgs e) { //reinitialize the CurrentNote CurrentNote = new Note() { NoteID = Guid.NewGuid().ToString(), LastModified = DateTime.Now }; } //handle Remove button private void btnRemove_Click(object sender, RoutedEventArgs e) {

//a valid existing note has to be selected if (CurrentNote == null || NotesByDate.SelectMany((tnd) => tnd.Notes). Where((nt) => nt == CurrentNote).Count() > 0) return; if (NetworkOn) { //use the WCF proxy NoteManagerClient remoteClient = new NoteManagerClient(); remoteClient.RemoveNoteCompleted += new EventHandler<AsyncCompletedEventArgs>((s, a) => { //refresh tree view RefreshNotesView(); }); //remove the note remoteClient.RemoveNoteAsync(CurrentNote.LastModified, CurrentNote.NoteID); } else { //use the local client LocalNoteManagerClient localClient = new LocalNoteManagerClient(); //remove note localClient.RemoveNote(CurrentNote.LastModified, CurrentNote.NoteID); //refresh tree view RefreshNotesView(); } } //handle Synchronize button private void btnSynchronize_Click(object sender, RoutedEventArgs e) { SynchronizeOfflineStore(); } private void SynchronizeOfflineStore() { LocalNoteManagerClient localClient = new LocalNoteManagerClient(); //Notes that are on the server with LastModifiedDate <= LastSynchronizedDate //but are missing on the client, must have been deleted on the client List<Note> NotesDeletedOnClient = NotesByDate.SelectMany((tnd) => tnd.Notes).Distinct(). Where((nt) => nt.LastSynchronized >= nt.LastModified). Except(localClient.GetDates().

We look for evidence that the applicant is passionate about computers and really loves programming. Typical evidence of this: Jobs with computers or experience programming going back to a very early age. Great programmers are more likely to have spent a summer at computer camp, or building an online appointment scheduler for their uncle the dentist, rather than working at Banana Republic folding clothes. Extra-curricular activities. People who love programming often work on their own programming projects (or contribute to an open source project) in their spare time. Waxing rhapsodic in their cover letter about how they were moved to tears by Structure and Interpretation of Computer Programs.1

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