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Are there any flags i need to provide to CefSharp to work with document elements?

I converted a window of mine to use CefSharp in order to render some PDF file. One of the features the old component supported (WebBrowser of WPF, which unfortunately depends on IE, which does not work in this case) is accessing javascript elements through code in order to be aware of when the PDF has been scrolled to the bottom. Unfortunately this does not appear to work with CefSharp with the following code. Perhaps i am missing some initializer flag for this to work?
Currently in my Logs All i get is ScrollProgress|0|0|734
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Forms;
using System.Windows.Forms.Integration;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using CefSharp;
using NLog;
using Application = System.Windows.Application;
using MessageBox = System.Windows.MessageBox;
using WebBrowser = System.Windows.Forms.WebBrowser;
namespace MyNamespace
{
public partial class PdfConfirmWindow : Window
{
private static readonly ILogger Log = LogManager.GetLogger(nameof(PdfConfirmWindow));
public PdfConfirmWindow()
{
InitializeComponent();
}
private void WindowLoaded(object sender, RoutedEventArgs e)
{
ChromiumWebBrowser.LoadingStateChanged += ChromiumWebBrowserOnLoadingStateChanged;
UpdateBrowserContent();
}
private void ChromiumWebBrowserOnLoadingStateChanged(object sender, LoadingStateChangedEventArgs e)
{
if (!e.IsLoading)
{
Log.Debug("Loading completed");
Application.Current.Dispatcher.BeginInvoke(new Action(() =>
{
// (window.innerHeight + window.scrollY) >= document.body.offsetHeight
// e.scrollHeight - e.scrollTop === e.clientHeight
// CefSharp.PostMessage('EndOfDocumentReached');
const string script = #"
(function(){
var intervalHandler;
function onScrollCallback() {
var e = document.body;
var values = ['ScrollProgress'];
values.push(document.body.clientHeight);
values.push(window.scrollY);
values.push(window.innerHeight);
CefSharp.PostMessage(values.join('|'));
if ((window.innerHeight + window.scrollY) >= document.body.offsetHeight){
//clearInterval(intervalHandler);
}
}
setTimeout(function(){
var intervalHandler = setInterval(function(){
onScrollCallback();
}, 100);
}, 500);
})();
";
ChromiumWebBrowser.Focus();
ChromiumWebBrowser.WebBrowser.JavascriptMessageReceived += WebBrowserOnJavascriptMessageReceived;
ChromiumWebBrowser.WebBrowser.ExecuteScriptAsync(script);
}));
}
}
private async void WebBrowserOnJavascriptMessageReceived(object sender, JavascriptMessageReceivedEventArgs e)
{
await UIHelper.Thread;
// ChromiumWebBrowser.WebBrowser.JavascriptMessageReceived -= WebBrowserOnJavascriptMessageReceived;
if (e.Message?.ToString().Equals("EndOfDocumentReached", StringComparison.OrdinalIgnoreCase) == true)
{
SetReachedStatus(true);
}
if (e.Message?.ToString().StartsWith("ScrollProgress", StringComparison.OrdinalIgnoreCase) == true)
{
Log.Debug(e.Message?.ToString());
}
}
}

invalidoperationexception In the Begin method of Save The Humans Game

I started learning C# using the book Head First C# and i'm doing the game in chapter 1 using WPF project , the thing is i think i followed everything according to the book but i get a invalidoperationexception in the begin method
here is the code i wrote :
using System;using
System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Media.Animation;`
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
Random random = new Random();
public MainWindow()
{
InitializeComponent();
}
private void startButton_Click(object sender, RoutedEventArgs e)
{
AddEnemy();
}
private void AddEnemy()
{
ContentControl enemy = new ContentControl();
enemy.Template = Resources["EnemyTemplate"] as ControlTemplate;
AnimateEnemy(enemy,0,Play_Area.ActualWidth-100,"(Canvas.left)");
AnimateEnemy(enemy, random.Next((int)Play_Area.ActualHeight - 100), random.Next((int)Play_Area.ActualHeight - 100), "(Canvas.Top)");
Play_Area.Children.Add(enemy);
}
private void AnimateEnemy(ContentControl enemy, double from, double to, string propertyToAnimate)
{
Storyboard storyboard = new Storyboard () { AutoReverse = true, RepeatBehavior = RepeatBehavior.Forever };
DoubleAnimation animation = new DoubleAnimation()
{
From = from,
To = to,
Duration = new Duration(TimeSpan.FromSeconds(random.Next(4, 6))),
};
Storyboard.SetTarget(animation, enemy);
Storyboard.SetTargetProperty(animation, new PropertyPath(propertyToAnimate));
storyboard.Children.Add(animation);
storyboard.Begin();
}
}
}
Here is a picture of my document Outline : Document Outline
why do i get the exception ? can anyone help me ?

Property names are case-sensitive. Try to change Canvas.left to Canvas.Left with an upper-case L:
AnimateEnemy(enemy,0,Play_Area.ActualWidth-100,"(Canvas.Left)");

SignalGenerator class at naudio library - duration time play

I use naudio for generating a tone in a specified frequency like that:
private void gen_Sinus(double frequency)
{
WaveOut _myWaveOut = new WaveOut();
SignalGenerator mySinus = new SignalGenerator(44100, 1);//using NAudio.Wave.SampleProviders;
mySinus.Frequency = frequency;
mySinus.Type = SignalGeneratorType.Sin;
_myWaveOut.Init(mySinus);
_myWaveOut.Play();
}
I want that when clicking a button it will play that tone for a specific time that will be passed to this method. Let's call it for example:
double toneDuration
I prefer to prevent some sleep methods because it has to be as accurate as possible.

You can use OffsetSampleProvider to do this, and set the Take duration:
var trimmed = new OffsetSampleProvider(signalGenerator);
trimmed.Take = TimeSpan.FromSeconds(10);
waveOut.Init(trimmed);
waveOut.Play();

Use a timer and a wait handler
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
timer1.Tick += new EventHandler(timer1_Tick);
}
static AutoResetEvent autoEvent = new AutoResetEvent(false);
private void gen_Sinus(double frequency)
{
WaveOut _myWaveOut = new WaveOut();
SignalGenerator mySinus = new SignalGenerator(44100, 1);//using NAudio.Wave.SampleProviders;
mySinus.Frequency = frequency;
mySinus.Type = SignalGeneratorType.Sin;
_myWaveOut.Init(mySinus);
timer1.Interval = 5000;
timer1.Start()
_myWaveOut.Play();
autoEvent.Reset();
autoEvent.WaitOne();
_myWaveOut.Stop();
}
private void timer1_Tick(object sender, EventArgs e)
{
autoEvent.Set();
}
}
}
​

Access Violation runtime error when getting WebBrowser .Url property

Getting an "Access Violation" runtime error when trying to get a WebBrowser's .Url property in an Outlook Add-In I'm writing. Need some help on how to get past this please. Research indicates I may need to set "FullTrust" permissionset, have tried that with no success.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Security;
using System.Security.Permissions;
namespace MyAddin1
{
public partial class authForm : Form
{
public string currentUrl;
public authForm()
{
InitializeComponent();
}
private void formLoaded(object sender, EventArgs e)
{
WebBrowser browser = new WebBrowser();
browser.Location = new System.Drawing.Point(0, 0);
browser.Width = 870;
browser.Height = 510;
browser.Navigate("https://www.yammer.com/dialog/oauth?client_id=<redacted>&response_type=token");
browser.Show();
//runtime error occurs on following line
currentUrl = browser.Url.ToString();
browser.Url = new Uri("http://www.yahoo.com");
browser.Navigated += new WebBrowserNavigatedEventHandler(checkForToken);
this.Controls.Add(browser);
}
private void checkForToken(object sender, EventArgs e)
{
MessageBox.Show(currentUrl);
}
}
}

browser.Url is initially null, Change your code as below.
if (browser.Url != null)
{
currentUrl = browser.Url.ToString();
}

Background image is changed to default on wp7

In my windows phone 7 application, i have created a button to change the default background image and the users can have their own custom skins on the app. It worked perfectly. But when the users exits the app and relaunches it again the application's background image is changed to default. But what i needed is, the application should have the last image that is chosen by the user even is launched no. of times. Can anyone help me with this? Thanks in advance for your hard work!
private void BackgroundBrowserIcon_MouseEnter(object sender, MouseEventArgs e)
{
var PhotoChooser = new PhotoChooserTask();
PhotoChooser.Completed += new EventHandler<PhotoResult>(PhotoChooser_Completed);
PhotoChooser.Show();
}
void PhotoChooser_Completed(object sender, PhotoResult e)
{
{
if (e.TaskResult == TaskResult.OK)
{
System.Windows.Media.Imaging.BitmapImage bmp = new System.Windows.Media.Imaging.BitmapImage();
bmp.SetSource(e.ChosenPhoto);
var app = Application.Current as App;
if (app == null)
return;
var imageBrush = new ImageBrush { ImageSource = bmp, Opacity = 1.0d };
this.LayoutRoot.Background = imageBrush;
app.backchanged = true;
app.appbrush = imageBrush;
}
}
}

Are you using IsolatedStorageSettings to store the last chosen photo, and then loading it on app launch?
Update:
Check out this post, as it explains how to code exactly what you are looking to accomplish: http://www.windowsphonegeek.com/tips/All-about-WP7-Isolated-Storage---Read-and-Save-Captured-Image

Check out this article to learn how to store IsolatedStorageSettings.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using System.IO.IsolatedStorage;
namespace F5debugWp7IsolatedStorage
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
}
private void button3_Click(object sender, RoutedEventArgs e)
{
IsolatedStorageSettings ISSetting = IsolatedStorageSettings.ApplicationSettings;
if (!ISSetting.Contains("DataKey"))
{
ISSetting.Add("DataKey", txtSaveData.Text);
}
else
{
ISSetting["DataKey"] = txtSaveData.Text;
}
ISSetting.Save();
}
}
}