Tutorial: Create a OneNote app

  • Article

Applies to: Consumer notebooks on OneDrive | Enterprise notebooks on Office 365

This tutorial shows you how to create a simple app that uses the OneNote API to get and create OneNote content. The app we'll create makes two calls using the OneNote REST API:

  • Get the name and id of the 10 most recently modified sections.

    GET ../notes/sections?select=name,id&top=10&orderby=lastModifiedTime%20desc

  • Create a page in a specific section.

    POST ../notes/sections/{id}/pages

Choose your platform:

Note

This tutorial is intended to demonstrate how to access the OneNote API, but it doesn't contain production-ready code. When creating your app, carefully review your code for potential security, validation, and other code-quality issues.

Create a OneNote app for iOS

The app uses the OneDrive SDK for iOS to handle authentication and network calls.

Prerequisites

Here's what you'll need to follow this tutorial:

To create a OneNote app for iOS

  1. Create the project
  2. Add the OneDrive SDK dependency
  3. Build the UI
  4. Add auth support
  5. Call the OneNote API

Complete code examples for key sample files are included at the end of the tutorial.

Create the project in Xcode

  1. In Xcode, create a Single View Application project for iOS named OneNote-iOS-App. Choose Objective C, and choose iPhone devices.

  2. After the project is created, close Xcode. You'll open the workspace after you create a Podfile.

Add the OneDrive SDK dependency

The app in this tutorial uses the OneDrive SDK for both Microsoft account (formerly Live Connect) and Azure Active Directory authentication. Microsoft account authentication is used for access to consumer notebooks on OneDrive. Azure AD authentication is used for access to enterprise notebooks on Office 365.

  1. Run these commands in Terminal to create a Podfile and open the file in Xcode.

    cd {path to the OneNote-iOS-App project directory} 
touch podfile 
open -a xcode podfile

  2. Add the OneDrive SDK dependency to the Podfile, and then save the file.

    pod 'OneDriveSDK'

  3. Run these commands in Terminal to install the dependency and open the project workspace in Xcode. You should receive confirmation when the installation is complete.

    pod install
open onenote-ios-app.xcworkspace/

Xcode 7 apps that target iOS 9.0

If you're targeting iOS 9 with Xcode 7, you need to enable PFS exceptions. See the iOS 9 App Transport Security section in the OneDrive SDK for iOS readme for instructions.

Build the UI

Add a picker that displays the user's 10 most recently modified sections and a button that creates a OneNote page in the selected section.

  1. In Xcode, open Main.storyboard and change the size class control (below the canvas) to wCompact/hAny.

  2. Drag a Picker View and a Button from the Object Library to the canvas. Use Create page for the button text.

  3. Create connections for the picker view:
    a. Control-drag the picker view to the View Controller icon above the canvas. Choose the dataSource outlet.
    b. Repeat for the delegate outlet.
    c. Choose View > Assistant Editor > Show Assistant Editor and open ViewController.h in the second window.
    d. Control-drag the picker view in the canvas into the @interface code block. Insert an Outlet connection named sectionPicker.

  4. Create connections for the button:
    a. Control-drag the button in the canvas into the @interface code block. Insert an Outlet connection named createPageButton.
    b. Open ViewController.m in the assistant editor.
    c. Control-drag the button in the canvas into the @implementation code block. Insert an Action connection named createPage for the Touch Up Inside event.

  5. Declare the UIPickerViewDelegate and UIPickerViewDataSource protocols.

    ViewController.h should look like this:

     import <UIKit/UIKit.h>

 @interface ViewController : UIViewController<UIPickerViewDelegate, UIPickerViewDataSource>

 @property (weak, nonatomic) IBOutlet UIPickerView *sectionPicker;
 @property (weak, nonatomic) IBOutlet UIButton *createPageButton;

 @end

  6. In ViewController.m, add the following delegate methods for the picker view.

     #pragma mark - Delegate Methods
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return sectionNamesForPicker.count;
}

-(NSString *)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return [sectionNamesForPicker objectAtIndex:row];
}

    Don`t worry about the errors for sectionNamesForPicker. We'll add the variable later.

  7. In the viewDidLoad method, add the following code to connect the picker after the line [super viewDidLoad].

     self.sectionPicker.delegate = self;
 self.sectionPicker.dataSource = self;

Add auth support

The OneDrive SDK handles authentication and authorization for you. You'll just need to provide identifiers for your application and then use the ODClient. The SDK invokes the sign-in UI the first time the user runs the app and then stores the account information. (Learn more about auth in the SDK.)

  1. In AppDelegate.m, import the OneDrive SDK.

     #import <OneDriveSDK/OneDriveSDK.h>

  2. Replace the didFinishLaunchingWithOptions method with the following code.

    Then, replace the placeholder property values with the information for your registered app(s). If you're only testing with one app, you can comment out the properties that you're not using.

      (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

     // Set the client ID and permission scopes of your app registered on the Microsoft account Developer Center.
     static NSString *const msaClientId = @"000000001A123456";
     static NSString *const msaScopesString = @"wl.signin,wl.offline_access,office.onenote_update";

     // Set the client ID and redirect URI of your app registered on the Azure Management Portal.
     static NSString *const aadClientId = @"0b18d05c-386d-4133-b481-az1234567890";
     static NSString *const aadRedirectUri = @"https://localhost/";

     // Set properties on the ODClient.
     NSArray *const msaScopes = [msaScopesString componentsSeparatedByString:@","];
     [ODClient setMicrosoftAccountAppId:msaClientId
                                 scopes:msaScopes];

     [ODClient setActiveDirectoryAppId:aadClientId
                            capability:@"Notes"
                           redirectURL:aadRedirectUri];
     return YES;
 }

    Note

    This app lets you sign in with one account at a time (Microsoft account or work or school account). To see how to support both account types and store multiple accounts, see the CloudRoll sample.

  3. In ViewController.h, import the OneDrive SDK and declare a property for the ODClient object. All calls to the SDK are made through the ODClient object.

    a. Add the import statement:

      #import <OneDriveSDK/OneDriveSDK.h>

    b. Add the client property to the @interface code block.

      @property (strong, nonatomic) ODClient *client;

  4. In ViewController.m, add the following code to the end of the viewDidLoad method to get an authenticated ODClient.

    The SDK invokes the sign-in UI the first time the user runs the app and then stores the account information.

         [ODClient clientWithCompletion:^(ODClient *odClient, NSError *error) {
         if (!error){
             self.client = odClient;
             [self getSections];
         }
         else {
             NSLog(@"Error with auth: %@", [error localizedDescription]);
         }
     }];

    We'll add the getSections method in the next section.

  5. In ViewController.m, add the sendRequest method to the @implementation code block.

    This method adds the required Authorization header to the GET sections and the POST pages requests, and creates the data transfer task.

     // Send the request.
 - (void)sendRequest:(NSMutableURLRequest *)request {

     // Add the required Authorization header with access token.
     [self.client.authProvider appendAuthHeaders:request completion:^(NSMutableURLRequest *requests, NSError *error) {

         // This app also uses the OneDrive SDK to send HTTP requests.
         [[self.client.httpProvider dataTaskWithRequest:(request)
                 completionHandler:^(NSData *data,
                 NSURLResponse *response,
                 NSError *error) {
                     [self handleResponse:data response:response error:error];
         }] resume];
     }];
 }

Now you're ready to make calls to the OneNote service.

Call the OneNote API

When the app loads, it gets the name and ID of the 10 most recently modified sections and populates the picker with the section names. The new page is created in the selected section.

  1. In ViewController.h, add properties that store the response.

    // Variables to store the response data.
@property (strong, nonatomic) NSHTTPURLResponse *returnResponse;
@property (strong, nonatomic) NSMutableData *returnData;

    Add all the code in the following steps to the @implementation code block in ViewController.m. Don't worry about the errors you see while you're creating the app. They'll go away after the code is complete.

  2. In ViewController.m, add variables for the OneNote service root URL, the dictionary for the section names and IDs, and an array for the section names that will populate the picker.

    static NSString const *serviceRootUrl = @"https://www.onenote.com/api/v1.0/me/notes/";
NSMutableDictionary *sectionNamesAndIds;
NSArray *sectionNamesForPicker;

  3. Add the getSections method to build the GET sections request.

     // Build the "GET sections" request.
 - (void)getSections {

     // Construct the request URI and the request.
     NSString *sectionsEndpoint =
             [serviceRootUrl stringByAppendingString:@"sections?select=name,id&top=10&orderby=lastModifiedTime%20desc"];
     NSMutableURLRequest *request =
             [[NSMutableURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:sectionsEndpoint]];
     request.HTTPMethod = @"GET";
     if (self.client)
     {

         // Send the HTTP request.
         [self sendRequest:request];
     }
     _createPageButton.enabled = false;
 }

  4. Add the handleResponse method to handle the response from the GET sections and POST pages requests.

    // Handle the response.
- (void)handleResponse:(NSData *)data response:(NSURLResponse *)response error:(NSError *) error {

    // Log the response.
    NSLog(@"Response %@ with error %@.\n", response, error);
    NSString *stringData = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"Body: %@.\n", stringData);

    // Store the response.
    self.returnData = [[NSMutableData alloc] init];
    NSMutableData *convertedData = [data mutableCopy];
    [self.returnData appendData:convertedData];
    self.returnResponse = (NSHTTPURLResponse *)response;

    NSInteger status = [self.returnResponse statusCode];

    // Check for "GET sections" success.
    if (status == 200) {
        NSLog(@"Sections retrieved!\n");

        // Get the section data and populate the picker.
        [self getSectionNamesAndIds];
    }

    // Check for "POST pages" success.
    else if (status == 201) {
        NSLog(@"Page created!\n");

        // Get the page object and parse out some properties.
        NSDictionary *pageProperties = [self convertData];
        NSString *selfLink = [pageProperties objectForKey:@"self"];
        NSDictionary *links = [pageProperties objectForKey:@"links"];
        NSString *clientUrl = [[links objectForKey:@"oneNoteClientUrl"] objectForKey:@"href"];
        NSString *webUrl = [[links objectForKey:@"oneNoteWebUrl"] objectForKey:@"href"];
        NSLog(@"Link to new page endpoint: %@\n", selfLink);
        NSLog(@"Link open page in the installed client: %@\n", clientUrl);
        NSLog(@"Link to open page in OneNote Online: %@\n", webUrl);
    }
    else {
        NSLog(@"Status code: %ld. Check the logged response for more information.", (long)status);
    }
}

  5. Add the convertData method to convert the response data to JSON.

    // Get the OneNote entity data from the response.
- (NSDictionary *)convertData {

    // Convert the message body to JSON.
    NSError *parseError;
    NSDictionary *data = [NSJSONSerialization JSONObjectWithData:self.returnData options:kNilOptions error:&parseError];

    if (!parseError) {
        return data;
    }
    else {
        NSLog(@"Error parsing response: %@", [parseError localizedDescription]);
        return nil;
    }
}

  6. Add the getSectionNamesAndIds method to store the section names and IDs and populate the picker.

    // Store the section names and IDs, and populate the section picker.
- (void)getSectionNamesAndIds {

    // Get the "value" array that contains the returned sections.
    NSDictionary *results = [self convertData];

    // Add the name-id pairs to sectionNamesAndIds, which is used to map section names to IDs.
    if ([results objectForKey:@"value"] != nil) {
        NSDictionary *sections =[results objectForKey:@"value"];
        sectionNamesAndIds = [[NSMutableDictionary alloc] init];
        for (NSMutableDictionary *dict in sections) {
            NSString *sectionName = [dict objectForKey:@"name"];
            NSString *sectionId = [dict objectForKey:@"id"];
            sectionNamesAndIds[sectionName] = sectionId;
        }
    }

    // Populate the picker with the section names.
    sectionNamesForPicker = [sectionNamesAndIds allKeys];
    dispatch_async(dispatch_get_main_queue(), ^{[_sectionPicker reloadComponent:0];});

    _createPageButton.enabled = true;
}

  7. Edit the createPage method that was created for you when you added the button action. This code creates a simple HTML page.

    // Create a simple page.
- (IBAction)createPage:(id)sender {

    // Get the ID of the section that's selected in the picker.
    NSInteger row = [self.sectionPicker selectedRowInComponent:0];
    NSString *selectedSectionName = sectionNamesForPicker[row];
    NSString *selectedSectionId = sectionNamesAndIds[selectedSectionName];

    // Construct the request URI and the request.
    NSString *pagesEndpoint = [NSString stringWithFormat:@"sections/%@/pages", selectedSectionId];
    NSString *fullEndpoint = [serviceRootUrl stringByAppendingString:pagesEndpoint];
    NSString *date = [self formatDate];
    NSString *simpleHtml = [NSString stringWithFormat:@"<html>"
                            "<head>"
                            "<title>A page created from simple HTML from iOS</title>"
                            "<meta name=\"created\" content=\"%@\" />"
                            "</head>"
                            "<body>"
                            "<p>This is some <b>simple</b> <i>formatted</i> text.</p>"
                            "</body>"
                            "</html>", date];

    NSData *presentation = [simpleHtml dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:fullEndpoint]];
    request.HTTPMethod = @"POST";
    request.HTTPBody = presentation;
    [request addValue:@"text/html" forHTTPHeaderField:@"Content-Type"];
    if (self.client)
    {

        // Send the HTTP request.
        [self sendRequest:request];
    }
}

  8. Add the formatDate method to get and ISO 8601-formatted date for the meta tag timestamp.

    // Format the "created" date. OneNote requires the ISO 8601 format.
- (NSString *)formatDate {
    NSDate *now = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
    [dateFormatter setLocale:enUSPOSIXLocale];
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
    return [dateFormatter stringFromDate:now];
}

After you've created the app, you can test it by running it on an iPhone or iPhone emulator. Sign in using your Microsoft account or work or school account.

When the app opens, pick the section where you want to create a page, and then choose Create page. Then check the output window in Xcode for the log messages. If the calls work, the output window will show the resource URI of the new page and the links to open the page in OneNote.

Next steps

Add functionality, input validation, and error handling.

For example, add a sign out button that calls this method:

- (IBAction)signOut:(UIButton *)sender  {
    [self.client signOutWithCompletion:^(NSError *signOutError) {
        self.client = nil;
        NSLog(@"Logged out.");
    }];
}

See the Develop with the OneNote API articles to learn more about what you can do with the OneNote API.

Complete code examples for iOS

AppDelegate.m

#import "AppDelegate.h"
#import <OneDriveSDK/OneDriveSDK.h>

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Set the client ID and permission scopes of your app registered on the Microsoft account Developer Center.
    static NSString *const msaClientId = @"000000001A123456";
    static NSString *const msaScopesString = @"wl.signin,wl.offline_access,office.onenote_update";

    // Set the client ID and redirect URI of your app registered on the Azure Management Portal.
    static NSString *const aadClientId = @"0b18d05c-386d-4133-b481-az1234567890";
    static NSString *const aadRedirectUri = @"https://localhost/";

    // Set properties on the ODClient.
    NSArray *const msaScopes = [msaScopesString componentsSeparatedByString:@","];
    [ODClient setMicrosoftAccountAppId:msaClientId
                                scopes:msaScopes];

    [ODClient setActiveDirectoryAppId:aadClientId
                           capability:@"Notes"
                          redirectURL:aadRedirectUri];
    return YES;
}

- (void)applicationWillResignActive:(UIApplication *)application {
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application {
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application {
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application {
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application {
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

ViewController.h

#import <UIKit/UIKit.h>
#import <OneDriveSDK/OneDriveSDK.h>

@interface ViewController : UIViewController<UIPickerViewDelegate, UIPickerViewDataSource>

@property (strong, nonatomic) ODClient *client;

// Variables to store the response data.
@property (strong, nonatomic) NSHTTPURLResponse *returnResponse;
@property (strong, nonatomic) NSMutableData *returnData;

// Outlet connections for controls.
@property (weak, nonatomic) IBOutlet UIPickerView *sectionPicker;
@property (weak, nonatomic) IBOutlet UIButton *createPageButton;

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

static NSString const *serviceRootUrl = @"https://www.onenote.com/api/v1.0/me/notes/";
NSMutableDictionary *sectionNamesAndIds;
NSArray *sectionNamesForPicker;

- (void)viewDidLoad {
    [super viewDidLoad];

    self.sectionPicker.delegate = self;
    self.sectionPicker.dataSource = self;

    [ODClient clientWithCompletion:^(ODClient *odClient, NSError *error) {
        if (!error){
            self.client = odClient;
            [self getSections];
        }
        else {
            NSLog(@"Error with auth: %@", [error localizedDescription]);
        }
    }];
}

// Build the "GET sections" request.
- (void)getSections {

    // Construct the request URI and the request.
    NSString *sectionsEndpoint =
            [serviceRootUrl stringByAppendingString:@"sections?select=name,id&top=10&orderby=lastModifiedTime%20desc"];
    NSMutableURLRequest *request =
            [[NSMutableURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:sectionsEndpoint]];
    request.HTTPMethod = @"GET";
    if (self.client)
    {

        // Send the HTTP request.
        [self sendRequest:request];
    }
    _createPageButton.enabled = false;
}

// Send the request.
- (void)sendRequest:(NSMutableURLRequest *)request {

    // Add the required Authorization header with access token.
    [self.client.authProvider appendAuthHeaders:request completion:^(NSMutableURLRequest *requests, NSError *error) {

        // This app also uses the OneDrive SDK to send HTTP requests.
        [[self.client.httpProvider dataTaskWithRequest:(request)
                completionHandler:^(NSData *data,
                NSURLResponse *response,
                NSError *error) {
                    [self handleResponse:data response:response error:error];
        }] resume];
    }];
}

// Store the section names and IDs, and populate the section picker.
- (void)getSectionNamesAndIds {

    // Get the "value" array that contains the returned sections.
    NSDictionary *results = [self convertData];

    // Add the name-id pairs to sectionNamesAndIds, which is used to map section names to IDs.
    if ([results objectForKey:@"value"] != nil) {
        NSDictionary *sections =[results objectForKey:@"value"];
        sectionNamesAndIds = [[NSMutableDictionary alloc] init];
        for (NSMutableDictionary *dict in sections) {
            NSString *sectionName = [dict objectForKey:@"name"];
            NSString *sectionId = [dict objectForKey:@"id"];
            sectionNamesAndIds[sectionName] = sectionId;
        }
    }

    // Populate the picker with the section names.
    sectionNamesForPicker = [sectionNamesAndIds allKeys];
    dispatch_async(dispatch_get_main_queue(), ^{[_sectionPicker reloadComponent:0];});

    _createPageButton.enabled = true;
}

// Get the OneNote entity data from the response.
- (NSDictionary *)convertData {

    // Convert the message body to JSON.
    NSError *parseError;
    NSDictionary *data = [NSJSONSerialization JSONObjectWithData:self.returnData options:kNilOptions error:&parseError];

    if (!parseError) {
        return data;
    }
    else {
        NSLog(@"Error parsing response: %@", [parseError localizedDescription]);
        return nil;
    }
}

// Handle the response.
- (void)handleResponse:(NSData *)data response:(NSURLResponse *)response error:(NSError *) error {

    // Log the response.
    NSLog(@"Response %@ with error %@.\n", response, error);
    NSString *stringData = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"Body: %@.\n", stringData);

    // Store the response.
    self.returnData = [[NSMutableData alloc] init];
    NSMutableData *convertedData = [data mutableCopy];
    [self.returnData appendData:convertedData];
    self.returnResponse = (NSHTTPURLResponse *)response;

    NSInteger status = [self.returnResponse statusCode];

    // Check for "GET sections" success.
    if (status == 200) {
        NSLog(@"Sections retrieved!\n");

        // Get the section data and populate the picker.
        [self getSectionNamesAndIds];
    }

    // Check for "POST pages" success.
    else if (status == 201) {
        NSLog(@"Page created!\n");

        // Get the page object and parse out some properties.
        NSDictionary *pageProperties = [self convertData];
        NSString *selfLink = [pageProperties objectForKey:@"self"];
        NSDictionary *links = [pageProperties objectForKey:@"links"];
        NSString *clientUrl = [[links objectForKey:@"oneNoteClientUrl"] objectForKey:@"href"];
        NSString *webUrl = [[links objectForKey:@"oneNoteWebUrl"] objectForKey:@"href"];
        NSLog(@"Link to new page endpoint: %@\n", selfLink);
        NSLog(@"Link open page in the installed client: %@\n", clientUrl);
        NSLog(@"Link to open page in OneNote Online: %@\n", webUrl);
    }
    else {
        NSLog(@"Status code: %ld. Check the logged response for more information.", (long)status);
    }
}

// Create a simple page.
- (IBAction)createPage:(id)sender {

    // Get the ID of the section that's selected in the picker.
    NSInteger row = [self.sectionPicker selectedRowInComponent:0];
    NSString *selectedSectionName = sectionNamesForPicker[row];
    NSString *selectedSectionId = sectionNamesAndIds[selectedSectionName];

    // Construct the request URI and the request.
    NSString *pagesEndpoint = [NSString stringWithFormat:@"sections/%@/pages", selectedSectionId];
    NSString *fullEndpoint = [serviceRootUrl stringByAppendingString:pagesEndpoint];
    NSString *date = [self formatDate];
    NSString *simpleHtml = [NSString stringWithFormat:@"<html>"
                            "<head>"
                            "<title>A page created from simple HTML from iOS</title>"
                            "<meta name=\"created\" content=\"%@\" />"
                            "</head>"
                            "<body>"
                            "<p>This is some <b>simple</b> <i>formatted</i> text.</p>"
                            "</body>"
                            "</html>", date];

    NSData *presentation = [simpleHtml dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:fullEndpoint]];
    request.HTTPMethod = @"POST";
    request.HTTPBody = presentation;
    [request addValue:@"text/html" forHTTPHeaderField:@"Content-Type"];
    if (self.client)
    {

        // Send the HTTP request.
        [self sendRequest:request];
    }
}

// Format the "created" date. OneNote requires the ISO 8601 format.
- (NSString *)formatDate {
    NSDate *now = [NSDate date];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
    [dateFormatter setLocale:enUSPOSIXLocale];
    [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
    return [dateFormatter stringFromDate:now];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Delegate Methods
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    return sectionNamesForPicker.count;
}

-(NSString *)pickerView:(UIPickerView*)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return [sectionNamesForPicker objectAtIndex:row];
}
@end

Create a OneNote app for ASP.NET MVC

This web application uses Azure Active Directory Authentication Library (ADAL) for .NET to authenticate work and school accounts from multiple tenants.

Prerequisites

Here's what you'll need to follow this tutorial:

  • Visual Studio 2015. You can use the free Visual Studio Community edition.
  • A web application registered on the Azure Management Portal, with the following delegated permissions:
    • Sign in and read user profile for Windows Azure Active Directory
    • View and modify OneNote notebooks for OneNote

Note

Visual Studio registers the web app for you during app creation, but you'll still need to add permissions for OneNote and generate an app key. (Learn more about app registration.)

To create a OneNote app using ASP.NET MVC

  1. Create the project
  2. Add the ADAL for .NET library
  3. Build the UI
  4. Add auth support
  5. Call the OneNote API

Complete code examples for key sample files are included at the end of the tutorial.

Create the project in Visual Studio

  1. In Visual Studio, create an ASP.NET Web Application project named OneNote-WebApp.

  2. Choose the MVC template and make sure that MVC is selected for the Add folders and core references option.

  3. Choose Change Authentication, and then choose Work And School Accounts.

  4. Choose Cloud - Multiple Organizations and enter the domain name of your developer tenant (for example, contoso.onmicrosoft.com).

You can keep or clear the Microsoft Azure Host in the cloud setting, as desired. It's not required for this tutorial. Keep all other default settings.

Visual Studio registers the web app with Azure for you, but you need to finish configuring it in the Azure Management Portal.

  1. In your tenant directory in the portal, choose Applications and then click the OneNote-Web app to open its configuration page.

  2. In the Keys section, choose a duration for a new key.

  3. In the Permissions to other applications section, add the OneNote application and then add the View and modify OneNote notebooks delegated permission. (learn more)

  4. Save your changes to the app, and make a copy of the new key before you close the portal. You'll use it soon.

Add ADAL for .NET

The app uses the Active Directory Authentication Library (ADAL) to authenticate and authorize to Azure AD. The app was created using version 2.19.208020213.

  1. In Visual Studio, choose Tools > NuGet Package Manager > Package Manager Console and run the following command in the console.

    Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory

Build the UI

This app uses two views for HomeController: Index.cshtml and Page.cshtml.

  1. Replace the contents of Views/Home/Index.cshtml with the following code. This adds a drop-down list to select the parent section, a text box to input the page name, and a button.

    @model OneNote_WebApp.Models.SectionsViewModel

@{
    ViewBag.Title = "Index";
}

<h2>OneNote ASP.NET MVC web application</h2>

@Html.Label("Choose a section to create the page in.")

@using (Html.BeginForm("CreatePageAsync", "Home", new AjaxOptions { UpdateTargetId = "create-page" }))
{
    <div id="create-page">
        @Html.DropDownListFor(
            m => m.SectionId,
            new SelectList(Model.Sections, "Id", "Name", Model.SectionId))
        @Html.ValidationMessageFor(m => m.SectionId)
        <br />
        <br />
        <table>
            <tr>
                <td>
                    @Html.Label("Enter a name for the new page.")
                    <br />
                    @Html.TextBox("page-name", null, new { @style = "width=80" })
                </td>
            </tr>
        </table>
        <button>Create page</button>
    </div>
}

  2. In the Views/Home folder, create a new view named Page and add the following code. This view displays properties for the newly created page.

    @model OneNote_WebApp.Models.PageViewModel

@{
     ViewBag.Title = "Page";
}

<h2>Page: @Model.Title</h2>

<table>
    <tr>
        <td>@Html.Label("Self link: ")</td>
        <td>@Model.Self</td>
    </tr>
    <tr>
        <td>@Html.Label("Native client link: ")</td>
        <td><a href="@Model.PageLinks.ClientUrl">@Model.PageLinks.ClientUrl</a></td>
    </tr>
    <tr>
        <td>@Html.Label("Web client link: ")</td>
        <td><a href="@Model.PageLinks.WebUrl">@Model.PageLinks.WebUrl</a></td>
    </tr>
</table>

Add auth support

The ADAL for .NET client library handles the authentication and authorization process. You'll just need to provide identifiers for your application and add a couple calls.

  1. In the root Web.config file, add the following key/value pairs to the appSettings node. Notice that the ClientId and AADInstance have already been added by Visual Studio.

    <add key="ida:AppKey" value="ENTER-your-app-key-here" />
<add key="ida:OneNoteResourceId" value="https://onenote.com/" />

  2. Replace the placeholder value for the app key with the key you generated earlier.

  3. In App_Start/Start.Auth.cs, add the following using statement.

    using Microsoft.IdentityModel.Clients.ActiveDirectory;

  4. Replace the global variables in the Startup class with the following code. The GetAuthorizedClient method in HomeController also uses the four public variables.

    public static string ClientId = ConfigurationManager.AppSettings["ida:ClientId"];
public static string AppKey = ConfigurationManager.AppSettings["ida:AppKey"];
public static string AADInstance = ConfigurationManager.AppSettings["ida:AADInstance"];
public static string OneNoteResourceId = ConfigurationManager.AppSettings["ida:OneNoteResourceId"];
private string Authority = AADInstance + "common";

  5. In the ConfigureAuth method, replace the app.UseOpenIdConnectAuthentication method with the following code. ADAL stores tokens and other information in the token cache. (To see what's cached, add this line before returning the task: var cache = context.TokenCache.ReadItems();)

    app.UseOpenIdConnectAuthentication(
   new OpenIdConnectAuthenticationOptions
   {
       ClientId = ClientId,
       Authority = Authority,
       TokenValidationParameters = new System.IdentityModel.Tokens.TokenValidationParameters
       {
           ValidateIssuer = false
       },
       Notifications = new OpenIdConnectAuthenticationNotifications()
       {
            AuthorizationCodeReceived = (context) =>
            {
                var code = context.Code;
                ClientCredential credential = new ClientCredential(ClientId, AppKey);
                Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext authContext =
                   new Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext(Authority);
                AuthenticationResult result = authContext.AcquireTokenByAuthorizationCode(
                    code,
                    new Uri(HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path)),
                    credential,
                    OneNoteResourceId
                );
                return Task.FromResult(0);
            },
            AuthenticationFailed = (context) =>
            {
                context.HandleResponse();
                if (context.Exception.HResult == -2146233088) //IDX10311: Nonce is null
                {
                    context.OwinContext.Response.Redirect("Home/Index");
                }
                return Task.FromResult(0);
            }
        }
    });

  6. In Controllers/HomeController.cs, add the following using statements.

    using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.OpenIdConnect;
using Newtonsoft.Json;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using OneNote_WebApp.Models;

  7. In the HomeController class, add the GetAuthorizedClient method. This method creates and configures the HttpClient used to make the REST requests to the OneNote service. It also gets the access token and adds it to the client.

    private HttpClient GetAuthorizedClient()
{
    HttpClient client = new HttpClient();

    string userObjectId = ClaimsPrincipal.Current.FindFirst("https://schemas.microsoft.com/identity/claims/objectidentifier").Value;
    string tenantId = ClaimsPrincipal.Current.FindFirst("https://schemas.microsoft.com/identity/claims/tenantid").Value;
    ClientCredential credential = new ClientCredential(Startup.ClientId, Startup.AppKey);
    AuthenticationContext authContext = new AuthenticationContext(Startup.AADInstance + tenantId);

    try
    {
        // Call AcquireTokenSilent to get the access token. This first tries to get the token from cache.
        AuthenticationResult authResult = authContext.AcquireTokenSilent(
            Startup.OneNoteResourceId,
            credential,
            new UserIdentifier(userObjectId, UserIdentifierType.UniqueId));
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authResult.AccessToken);
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    }
    catch (AdalSilentTokenAcquisitionException)
    {
        HttpContext.GetOwinContext().Authentication.Challenge(
            new AuthenticationProperties() { RedirectUri = "/" },
            OpenIdConnectAuthenticationDefaults.AuthenticationType);
        return null;
    }

    return client;
}

Now you're ready to make calls to the OneNote service and parse the response.

Call the OneNote API

When the app loads, it gets the name and ID of the 10 most recently modified sections and populates the drop-down list with the section names. The new OneNote page is created in the selected section.

  1. In the HomeController class, add global variables for the OneNote endpoints and the path to the image file to add to the new page.

    public static string OneNoteRoot = "https://www.onenote.com/api/v1.0/me/notes/";
public static string SectionsEndpoint = "sections?select=name,id&top=10&orderby=lastModifiedTime%20desc";
public static string PagesEndpoint = "sections/{0}/pages";
public static string PathToImageFile = @"C:\<local-path>\logo.png";

  2. Change the placeholder path and file name in the PathToImageFile variable to point to a local PNG image.

  3. Replace the Index method with the following code. This gets the sections, prepares SectionsViewModel for the Index view, and loads the view.

    public async Task<ActionResult> Index()
{
    SectionsViewModel viewModel = new SectionsViewModel();
    try
    {
        viewModel.Sections = await GetSectionsAsync();
    }
    catch (Exception ex)
    {
        return View("Error", new HandleErrorInfo(new Exception(ex.Message), "Home", "GetSectionsAsync"));
    }
    return View(viewModel);
}

  4. Add the GetSectionsAsync method to build and send the GET sections request and to parse the response.

    [Authorize]
[HttpGet]   
public async Task<IEnumerable<Section>> GetSectionsAsync()
{
    List<Section> sections = new List<Section>();

    HttpClient client = GetAuthorizedClient();
    HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, OneNoteRoot + SectionsEndpoint);
    HttpResponseMessage response = await client.SendAsync(request);
    if (response.IsSuccessStatusCode)
    {

        // Parse the JSON response.
        string stringResult = await response.Content.ReadAsStringAsync();
        Dictionary<string, dynamic> result = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(stringResult);
        foreach (var item in result["value"])
        {
            var current = item.ToObject<Dictionary<string, string>>();
            Section section = new Section
            {
                Name = current["name"],
                Id = current["id"]
            };
            sections.Add(section);
        }
    }
    else
    {
        throw new Exception("Error getting sections: " + response.StatusCode.ToString());
    }
    return sections;
}

  5. Add the CreatePageAsync method to build and send the POST pages multipart request and to parse the response. This request creates a simple HTML page.

    [Authorize]
[HttpPost]
public async Task<ActionResult> CreatePageAsync()
{
    HttpClient client = GetAuthorizedClient();

    // Get user input.
    string selectedSectionId = Request.Form["SectionId"];
    string pageName = Request.Form["page-name"];
    string pagesEndpoint = string.Format("sections/{0}/pages", selectedSectionId);

    // Define the page content, which includes an uploaded image.
    const string imagePartName = "imageBlock1";
    string iso8601Date = DateTime.Now.ToString("o");
    string pageHtml = "<html>" +
                      "<head>" +
                      "<title>" + pageName + "</title>" +
                      "<meta name=\"created\" content=\"" + iso8601Date + "\" />" +
                      "</head>" +
                      "<body>" +
                      "<h1>This is a page with an image</h1>" +
                      "<img src=\"name:" + imagePartName +
                      "\" alt=\"No mis monos\" width=\"250\" height=\"200\" />" +
                      "</body>" +
                      "</html>";

    HttpResponseMessage response;

    // Build the 'POST pages' request.
    var stream = new FileStream(PathToImageFile, FileMode.Open);
    using (var imageContent = new StreamContent(stream))
    {
        try
        {
            imageContent.Headers.ContentType = new MediaTypeHeaderValue("image/png");
            MultipartFormDataContent pageContent = new MultipartFormDataContent
            {
                {new StringContent(pageHtml, Encoding.UTF8, "text/html"), "Presentation"},
                {imageContent, imagePartName}
            };

            response = await client.PostAsync(OneNoteRoot + pagesEndpoint, pageContent);
            if (!response.IsSuccessStatusCode)
            {
                throw new Exception(response.StatusCode + ": " + response.ReasonPhrase);
            }
            else
            {

                // Parse the JSON response.
                string stringResult = await response.Content.ReadAsStringAsync();
                Dictionary<string, dynamic> pageData = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(stringResult);
                Dictionary<string, dynamic> linksData = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(pageData["links"].ToString());
                Links pageLinks = new Links
                {
                    ClientUrl = new Uri(linksData["oneNoteClientUrl"]["href"].ToString()),
                    WebUrl = new Uri(linksData["oneNoteWebUrl"]["href"].ToString())
                };
                PageViewModel pageViewModel = new PageViewModel
                {
                    Title = pageData["title"],
                    Self = new Uri(pageData["self"]),
                    PageLinks = pageLinks
                };
                return View("../home/page", pageViewModel);
            }
        }
        catch (Exception ex)
        {
            return View("Error", new HandleErrorInfo(new Exception(ex.Message), "Home", "CreatePageAsync"));
        }
    }
}

  6. In the Models folder, add new class named Resource.cs and use the following code. This defines the domain models that represent OneNote sections and pages, and the view models that represent OneNote data in the Index and Page views.

    using System;
using System.Collections.Generic;
using System.IO;

namespace OneNote_WebApp.Models
{

    // Common properties of OneNote entities.
    public class Resource
    {
        public string Id { get; set; }
        public string CreatedBy { get; set; }
        public DateTimeOffset CreatedTime { get; set; }
        public string LastModifiedBy { get; set; }
        public DateTimeOffset LastModifiedTime { get; set; }
        public Uri Self { get; set; }
    }

    // A OneNote section with some key properties. 
    public class Section : Resource
    {
        public bool IsDefault { get; set; }
        public string Name { get; set; }
        public ICollection<Page> Pages { get; set; }
        public Uri PagesUrl { get; set; }
    }

    // A OneNote page with some key properties.
    // This app doesn't use the Page model.
    public class Page : Resource
    {
        public Stream Content { get; set; }
        public Uri ContentUrl { get; set; }
        public Links PageLinks { get; set; }
        public string Title { get; set; }
    }

    // The links that open a OneNote page in the installed client or in OneNote Online.
    public class Links
    {
        public Uri ClientUrl { get; set; }
        public Uri WebUrl { get; set; }
    }

    // The view model used to populate the section drop-down list.
    public class SectionsViewModel
    {
        public string SectionId { get; set; }
        public IEnumerable<Section> Sections { get; set; }
    }

    // The view model used to display properties of the new page.
    public class PageViewModel
    {
        public string Title { get; set; }
        public Uri Self { get; set; }
        public Links PageLinks { get; set; }
    }
}

After you've created the app, you can run it with F5 debugging.

If you get an No assembly found containing an OwinStartupAttribute... error, add the following attribute after the using statements in the Startup.cs class in the root directory. (Learn more about this error.)

[assembly: OwinStartup(typeof(OneNote_WebApp.Startup))]

Sign in to the app using a work or school account that has at least one notebook that contains at least one section. In the app, pick the section where you want to create a page, enter a name for the new page, and then choose Create page. If successful, the app displays the title and self, and page links of the new page.

Complete code examples for ASP.NET MVC

Startup.Auth.cs

using System;
using System.Configuration;
using System.Threading.Tasks;
using System.Web;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.OpenIdConnect;
using Owin;
using Microsoft.IdentityModel.Clients.ActiveDirectory;

namespace OneNote_WebApp
{
    public partial class Startup
    {

        // Properties used for authorization.
        public static string ClientId = ConfigurationManager.AppSettings["ida:ClientId"];
        public static string AppKey = ConfigurationManager.AppSettings["ida:AppKey"];
        public static string AADInstance = ConfigurationManager.AppSettings["ida:AADInstance"];
        public static string OneNoteResourceId = ConfigurationManager.AppSettings["ida:OneNoteResourceId"];
        private string Authority = AADInstance + "common";

        public void ConfigureAuth(IAppBuilder app)
        {
            app.SetDefaultSignInAsAuthenticationType(CookieAuthenticationDefaults.AuthenticationType);

            app.UseCookieAuthentication(new CookieAuthenticationOptions { });

            app.UseOpenIdConnectAuthentication(
                new OpenIdConnectAuthenticationOptions
                {
                    ClientId = ClientId,
                    Authority = Authority,
                    TokenValidationParameters = new System.IdentityModel.Tokens.TokenValidationParameters
                    {
                        ValidateIssuer = false
                    },
                    Notifications = new OpenIdConnectAuthenticationNotifications()
                    {
                        AuthorizationCodeReceived = (context) =>
                        {
                            var code = context.Code;
                            ClientCredential credential = new ClientCredential(ClientId, AppKey);
                            Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext authContext =
                                new Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext(Authority);
                            AuthenticationResult result = authContext.AcquireTokenByAuthorizationCode(
                                code,
                                new Uri(HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path)),
                                credential,
                                OneNoteResourceId
                            );
                            return Task.FromResult(0);
                        },
                        AuthenticationFailed = (context) =>
                        {
                            context.HandleResponse();
                            if (context.Exception.HResult == -2146233088) //IDX10311: Nonce is null
                            {
                                context.OwinContext.Response.Redirect("Home/Index");
                            }
                            return Task.FromResult(0);
                        }
                    }
                });
        }
    }
}

HomeController

using System;
using System.Collections.Generic;
using System.Web.Mvc;
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Microsoft.Owin.Security;
using Microsoft.Owin.Security.OpenIdConnect;
using Newtonsoft.Json;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using OneNote_WebApp.Models;

namespace OneNote_WebApp.Controllers
{
    [Authorize]
    public class HomeController : Controller
    {

        // Route segments to OneNote resource endpoints.
        public static string OneNoteRoot = "https://www.onenote.com/api/v1.0/me/notes/";
        public static string SectionsEndpoint = "sections?select=name,id&top=10&orderby=lastModifiedTime%20desc";
        public static string PagesEndpoint = "sections/{0}/pages";

        // Path to the image file to add to the page. 
        // Change this to point to a local PNG file before running the app.
        public static string PathToImageFile = @"C:\<local-path>\logo.png";

        // Get sections, add them to SectionsViewModel, and load the view. 
        public async Task<ActionResult> Index()
        {
            SectionsViewModel viewModel = new SectionsViewModel();
            try
            {
                viewModel.Sections = await GetSectionsAsync();
            }
            catch (Exception ex)
            {
                return View("Error", new HandleErrorInfo(new Exception(ex.Message), "Home", "GetSectionsAsync"));
            }
            return View(viewModel);
        }

        // Create and configure the HttpClient used for requests to the OneNote API. 
        private HttpClient GetAuthorizedClient()
        {
            HttpClient client = new HttpClient();

            string userObjectId = ClaimsPrincipal.Current.FindFirst("https://schemas.microsoft.com/identity/claims/objectidentifier").Value;
            string tenantId = ClaimsPrincipal.Current.FindFirst("https://schemas.microsoft.com/identity/claims/tenantid").Value;
            ClientCredential credential = new ClientCredential(Startup.ClientId, Startup.AppKey);
            AuthenticationContext authContext = new AuthenticationContext(Startup.AADInstance + tenantId);

            try
            {
                // Call AcquireTokenSilent to get the access token. This first tries to get the token from cache.
                AuthenticationResult authResult = authContext.AcquireTokenSilent(
                    Startup.OneNoteResourceId,
                    credential,
                    new UserIdentifier(userObjectId, UserIdentifierType.UniqueId));
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authResult.AccessToken);
                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            }
            catch (AdalSilentTokenAcquisitionException)
            {
                HttpContext.GetOwinContext().Authentication.Challenge(
                    new AuthenticationProperties() { RedirectUri = "/" },
                    OpenIdConnectAuthenticationDefaults.AuthenticationType);
                return null;
            }
            return client;
        }

        [Authorize]
        [HttpGet]
        // Build the 'GET sections' request and parse the response. The request gets the 10 most recently modified sections.
        public async Task<IEnumerable<Section>> GetSectionsAsync()
        {
            List<Section> sections = new List<Section>();

            HttpClient client = GetAuthorizedClient();
            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, OneNoteRoot + SectionsEndpoint);
            HttpResponseMessage response = await client.SendAsync(request);
            if (response.IsSuccessStatusCode)
            {

                // Parse the JSON response.
                string stringResult = await response.Content.ReadAsStringAsync();
                Dictionary<string, dynamic> result = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(stringResult);
                foreach (var item in result["value"])
                {
                    var current = item.ToObject<Dictionary<string, string>>();
                    Section section = new Section
                    {
                        Name = current["name"],
                        Id = current["id"]
                    };
                    sections.Add(section);
                }
            }
            else
            {
                throw new Exception("Error getting sections: " + response.StatusCode.ToString());
            }
            return sections;
        }

        [Authorize]
        [HttpPost]
        // Build the multipart POST request and parse the response. The request creates a page in the selected section.
        public async Task<ActionResult> CreatePageAsync()
        {
            HttpClient client = GetAuthorizedClient();

            // Get user input.
            string selectedSectionId = Request.Form["SectionId"];
            string pageName = Request.Form["page-name"];
            string pagesEndpoint = string.Format("sections/{0}/pages", selectedSectionId);

            // Define the page content, which includes an uploaded image.
            const string imagePartName = "imageBlock1";
            string iso8601Date = DateTime.Now.ToString("o");
            string pageHtml = "<html>" +
                                "<head>" +
                                "<title>" + pageName + "</title>" +
                                "<meta name=\"created\" content=\"" + iso8601Date + "\" />" +
                                "</head>" +
                                "<body>" +
                                "<h1>This is a page with an image</h1>" +
                                "<img src=\"name:" + imagePartName +
                                "\" alt=\"No mis monos\" width=\"250\" height=\"200\" />" +
                                "</body>" +
                                "</html>";

            HttpResponseMessage response;

            // Build the 'POST pages' request.
            var stream = new FileStream(PathToImageFile, FileMode.Open);
            using (var imageContent = new StreamContent(stream))
            {
                try
                {
                    imageContent.Headers.ContentType = new MediaTypeHeaderValue("image/png");
                    MultipartFormDataContent pageContent = new MultipartFormDataContent
                    {
                        {new StringContent(pageHtml, Encoding.UTF8, "text/html"), "Presentation"},
                        {imageContent, imagePartName}
                    };

                    response = await client.PostAsync(OneNoteRoot + pagesEndpoint, pageContent);
                    if (!response.IsSuccessStatusCode)
                    {
                        throw new Exception(response.StatusCode + ": " + response.ReasonPhrase);
                    }
                    else
                    {

                        // Parse the JSON response.
                        string stringResult = await response.Content.ReadAsStringAsync();
                        Dictionary<string, dynamic> pageData = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(stringResult);
                        Dictionary<string, dynamic> linksData = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(pageData["links"].ToString());
                        Links pageLinks = new Links
                        {
                            ClientUrl = new Uri(linksData["oneNoteClientUrl"]["href"].ToString()),
                            WebUrl = new Uri(linksData["oneNoteWebUrl"]["href"].ToString())
                        };
                        PageViewModel pageViewModel = new PageViewModel
                        {
                            Title = pageData["title"],
                            Self = new Uri(pageData["self"]),
                            PageLinks = pageLinks
                        };
                        return View("../home/page", pageViewModel);
                    }
                }
                catch (Exception ex)
                {
                    return View("Error", new HandleErrorInfo(new Exception(ex.Message), "Home", "CreatePageAsync"));
                }
            }
        }

        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact()
        {
            ViewBag.Message = "Your contact page.";

            return View();
        }
    }
}

Index.cshtml, Page.cshtml, and Resource.cs are shown in their entirety in the instructions.

See also