How to post and get data from server using Get Webrequest

Question

Hi:-)
I'm trying to send a username and password argument my server and the server is suppose to send some string back. The following code, that I got of the web, just dies. I think this line:
HttpWebRequestpreq = result.AsyncState
asHttpWebRequest;
is null. Can you kindly fix this for me? Thank you in advance:-)
notes: I have a few textboxes with the values for the request params
I'm targeting Windows Phone 8.0 and Windows Phone 8.1 devices
privatevoidBtnSignUpSubmit_Tab(objectsender,
RoutedEventArgse)
//show error if Username == Username
if(TbUN.Text.ToString() ==
"Username")
MessageBox.Show("You
must fill in your Username in the Username textbox.\nThank you.");
return;
//make sure all fields are filled in
if(TbUN.Text.ToString() ==
""|| TbPW.Text.ToString()
== ""|| TbCPW.Text.ToString()
== "")
MessageBox.Show("All
fields must be filled in.\nThank you.");
return;
//make sure Password is the same as Confirm Password
if(TbPW.Text.CompareTo(TbCPW.Text) !=
0)
MessageBox.Show("Your
Password should be the same as Confirm Password.\nThank you.");
return;
//make sure Username contains valid characters
boolbValid = IsUsernameValid(TbUN.Text);
if(bValid)
                bSignUp =
true;
//disable textboxes
                TbUN.IsEnabled =
false;
                TbPW.IsEnabled =
false;
                TbCPW.IsEnabled =
false;
                TbEmail.IsEnabled =
false;
                BtnSignUpSubmit.IsEnabled =
false;
                title.Text =
"requesting...";
//make Post request top-server
//add parameters
stringdata =
"username="+TbUN.Text+"&Password="+TbPW.Text;
if(TbEmail.Text.Contains("@")
&& TbEmail.Text.Contains("."))
                    data +=
"&email="+ TbEmail.Text;
                System.
UriURL =
newUri("http://www.iclips.co.za/RegisterUsernameAndPassword.php");
WebRequestwebRequest =
WebRequest.Create(URL);
                webRequest.Method =
"POST";
                webRequest.ContentType =
"application/x-www-form-urlencoded";
                webRequest.ContentLength = data.Length;
//we first obtain an input stream to which to write the body of the HTTP POST
                webRequest.BeginGetRequestStream((
IAsyncResultresult) =>
HttpWebRequestpreq = result.AsyncState
asHttpWebRequest;
if(preq !=
null)
StreampostStream = preq.EndGetRequestStream(result);
//guess one could just accept a byte[] [via function argument] for arbitrary data types - images, audio,...
byte[] dataStream =
Encoding.UTF8.GetBytes(data);
                        postStream.Write(dataStream, 0, dataStream.Length);
                        postStream.Close();
//we can then finalize the request...
                        preq.BeginGetResponse((
IAsyncResultfinal_result) =>
HttpWebRequestreq = final_result.AsyncState
asHttpWebRequest;
if(req !=
null)
try
//we call the success callback as long as we get a response stream
WebResponseresponse = req.EndGetResponse(final_result);
                                    success_callback(response.GetResponseStream());
catch(WebExceptionwe)
//otherwise call the error/failure callback
                                    error_callback(we.Message);
return;
                        }, preq);
                }, URL);
privatevoiderror_callback(stringp)
if(bSignUp)
                bSignUp =
false;
// Show error message
MessageBox.Show("Connection
Error!\n\n"+ p);
//enable input
//disable textboxes
                TbUN.IsEnabled =
true;
                TbPW.IsEnabled =
true;
                TbCPW.IsEnabled =
true;
                TbEmail.IsEnabled =
true;
                BtnSignUpSubmit.IsEnabled =
false;
                title.Text =
"try again";
privatevoidsuccess_callback(Streamstream)
if(bSignUp)
                bSignUp =
false;
// Open the stream using a StreamReader for easy access.
StreamReaderreader =
newStreamReader(stream);
// Read the content.
stringresponse = reader.ReadToEnd();
// Display the content.
MessageBox.Show(response);
// Clean up the streams.
                reader.Close();

Answer 1

// Directives
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using iClips.Resources;
using System.ComponentModel;
using System.Threading;
using System.IO;
using System.IO.IsolatedStorage;
using Microsoft.Devices;
using System.Windows.Media;
using Microsoft.Xna.Framework.Media;
using System.Windows.Media.Imaging;
using System.Threading.Tasks;
using System.Text;
using Windows.Storage;
using System.Windows.Threading;
using System.Diagnostics;
using System.Globalization;
namespace iClips
public partial class MainPage : PhoneApplicationPage
Boolean bSignUp;
HyperlinkButton BtnSignIn, BtnSignUp, BtnSignUpSubmit;
TextBox TbUN, TbPW, TbCPW, TbEmail;
TextBlock un, title;
System.DateTime startTime;
// Viewfinder for capturing video.
private VideoBrush videoRecorderBrush;
// Source and device for capturing video.
private CaptureSource captureSource;
private CaptureDevice vcDevice;
double w, h;
// File details for storing the recording.
private IsolatedStorageFileStream isoVideoFile;
private FileSink fileSink;
private string isoVideoFileName = "CameraMovie.mp4";
// For managing button and application state.
private enum ButtonState { Initialized, Stopped, Ready, Recording, Playback, Paused, NoChange, CameraNotSupported };
private ButtonState currentAppState;
//create reference to SocketClient
SocketClient sock = new SocketClient();
// Constructor
public MainPage()
InitializeComponent();
//setup recording
// Prepare ApplicationBar and buttons.
PhoneAppBar = (ApplicationBar)ApplicationBar;
PhoneAppBar.IsVisible = true;
StartRecording = ((ApplicationBarIconButton)ApplicationBar.Buttons[0]);
StopPlaybackRecording = ((ApplicationBarIconButton)ApplicationBar.Buttons[1]);
StartPlayback = ((ApplicationBarIconButton)ApplicationBar.Buttons[2]);
PausePlayback = ((ApplicationBarIconButton)ApplicationBar.Buttons[3]);
//display a welcome message
txtDebug.Text = "Welcome to iClips.";
string result = sock.Connect("197.189.214.116", 5000);
txtOutput.Text = result;
if(result.Contains("success")){
sock.Send("#testing_");
SetScreenResolution();
//set image on load friends
/*Uri uri = new Uri("/Assets/home_icons/myFriends.png", UriKind.Relative);
BitmapImage imgSource = new BitmapImage(uri);
Image image = new Image();
image.Source = imgSource;
load_friends.Content = image;*/
SignIn();
private void SignIn()
// remove all elements inside sign grid
for (int index = MyGrid.Children.Count - 1; index >= 0; index--)
MyGrid.Children.RemoveAt(index);
BtnSignIn = new HyperlinkButton();
BtnSignIn.Content = "<< Sign In >>";
BtnSignIn.Click += new RoutedEventHandler(SignIn_Tab);
BtnSignIn.VerticalAlignment = VerticalAlignment.Bottom;
BtnSignUp = new HyperlinkButton();
BtnSignUp.Content = "<< I'm new here. Sign Up. >>";
BtnSignUp.Click += new RoutedEventHandler(SignUp_Tab);
BtnSignUp.VerticalAlignment = VerticalAlignment.Bottom;
un = new TextBlock();
un.Text = "Enter your Username:";
un.VerticalAlignment = VerticalAlignment.Bottom;
un.HorizontalAlignment = HorizontalAlignment.Center;
TextBlock pw = new TextBlock();
pw.Text = "Enter your Password:";
pw.VerticalAlignment = VerticalAlignment.Bottom;
pw.HorizontalAlignment = HorizontalAlignment.Center;
//setup username textbox
TbUN = new TextBox();
TbUN.Opacity = 0.5;
TbUN.Text = "";
TbUN.FontSize = 16;
TbUN.FontWeight = FontWeights.ExtraBold;
TbUN.Foreground = new SolidColorBrush(Colors.Black);
TbUN.Background = new SolidColorBrush(Colors.Transparent);
TbUN.VerticalAlignment = VerticalAlignment.Top;
TbUN.Height = 70;
TbUN.Tap += TbUN_Tap;
//setup password textbox
TbPW = new TextBox();
TbPW.Opacity = 0.5;
TbPW.Text = "";
TbPW.FontSize = 16;
TbPW.FontWeight = FontWeights.ExtraBold;
TbPW.Foreground = new SolidColorBrush(Colors.Black);
TbPW.Background = new SolidColorBrush(Colors.Transparent);
TbPW.VerticalAlignment = VerticalAlignment.Top;
TbPW.Height = 70;
TbPW.Tap += TbPW_Tap;
//Show the background color of MyGrid
MyGrid.Background = new SolidColorBrush(Colors.Blue);
// Create Row for Username Textblock
RowDefinition gridRow0 = new RowDefinition();
gridRow0.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow0);
// Create Row for Username
RowDefinition gridRow1 = new RowDefinition();
gridRow1.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow1);
//create row for password Textblock
RowDefinition gridRow2a = new RowDefinition();
gridRow2a.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow2a);
//create row for password
RowDefinition gridRow2 = new RowDefinition();
gridRow2.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow2);
//create row for << Sign In >>
RowDefinition gridRow3 = new RowDefinition();
gridRow3.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow3);
//create row for << Sign Up >>
RowDefinition gridRow4 = new RowDefinition();
gridRow4.Height = new GridLength(120);
MyGrid.RowDefinitions.Add(gridRow4);
Grid.SetRow(un, 0);
Grid.SetColumn(un, 0);
Grid.SetRow(TbUN, 1);
Grid.SetColumn(TbUN, 0);
Grid.SetRow(pw, 2);
Grid.SetColumn(pw, 0);
Grid.SetRow(TbPW, 3);
Grid.SetColumn(TbPW, 0);
Grid.SetRow(BtnSignIn, 4);
Grid.SetColumn(BtnSignIn, 0);
Grid.SetRow(BtnSignUp, 5);
Grid.SetColumn(BtnSignUp, 0);
MyGrid.Children.Add(un);
MyGrid.Children.Add(TbUN);
MyGrid.Children.Add(pw);
MyGrid.Children.Add(TbPW);
MyGrid.Children.Add(BtnSignIn);
MyGrid.Children.Add(BtnSignUp);
private void SignUp_Tab(object sender, RoutedEventArgs e)
MessageBox.Show("Welcome to Sign up.\n\nYou need 3 things to create an account:\n1. A unique Case-Sensitive Username. ex 'iClips' is not the same as 'Iclips'\n2. A password to secure you account. \n3. A profile photo for easy recognition.\nThank you.");
// remove all elements inside sign grid
for (int index = MyGrid.Children.Count - 1; index >= 0; index--)
MyGrid.Children.RemoveAt(index);
//repopulate grid with Sign Up elements
//create title
title = new TextBlock();
title.Text = "--- Sign Up 1/2 ---";
title.VerticalAlignment = VerticalAlignment.Top;
title.HorizontalAlignment = HorizontalAlignment.Center;
//field for Username
TbUN = new TextBox();
TbUN.Opacity = 0.5;
TbUN.Text = "Username";
TbUN.FontSize = 16;
TbUN.FontWeight = FontWeights.ExtraBold;
TbUN.Foreground = new SolidColorBrush(Colors.Black);
TbUN.Background = new SolidColorBrush(Colors.Transparent);
TbUN.VerticalAlignment = VerticalAlignment.Top;
TbUN.Height = 70;
TbUN.Tap += TbUN_Tap;
//field for Password
TbPW = new TextBox();
TbPW.Opacity = 0.5;
TbPW.Text = "Password";
TbPW.FontSize = 16;
TbPW.FontWeight = FontWeights.ExtraBold;
TbPW.Foreground = new SolidColorBrush(Colors.Black);
TbPW.Background = new SolidColorBrush(Colors.Transparent);
TbPW.VerticalAlignment = VerticalAlignment.Top;
TbPW.Height = 70;
TbPW.Tap += TbPW_Tap;
//field Confirm for Password
TbCPW = new TextBox();
TbCPW.Opacity = 0.5;
TbCPW.Text = "Confirm Password";
TbCPW.FontSize = 16;
TbCPW.FontWeight = FontWeights.ExtraBold;
TbCPW.Foreground = new SolidColorBrush(Colors.Black);
TbCPW.Background = new SolidColorBrush(Colors.Transparent);
TbCPW.VerticalAlignment = VerticalAlignment.Top;
TbCPW.Height = 70;
TbCPW.Tap += TbCPW_Tap;
//field for Optional Email
TbEmail = new TextBox();
TbEmail.Opacity = 0.5;
TbEmail.Text = "Email (Optional)";
TbEmail.FontSize = 16;
TbEmail.FontWeight = FontWeights.ExtraBold;
TbEmail.Foreground = new SolidColorBrush(Colors.Black);
TbEmail.Background = new SolidColorBrush(Colors.Transparent);
TbEmail.VerticalAlignment = VerticalAlignment.Top;
TbEmail.Height = 70;
TbEmail.Tap += TbEmail_Tap;
HyperlinkButton BtnGoBack = new HyperlinkButton();
BtnGoBack.Content = "<< Go Back ";
BtnGoBack.Click += new RoutedEventHandler(BtnGoBack_Tab);
BtnGoBack.VerticalAlignment = VerticalAlignment.Bottom;
BtnSignUpSubmit = new HyperlinkButton();
BtnSignUpSubmit.Content = "<< Sign Up >>";
BtnSignUpSubmit.Click += new RoutedEventHandler(BtnSignUpSubmit_Tab);
BtnSignUpSubmit.VerticalAlignment = VerticalAlignment.Bottom;
// Create Row for title
RowDefinition gridRow0 = new RowDefinition();
gridRow0.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow0);
// Create Row for Username
RowDefinition gridRow1 = new RowDefinition();
gridRow1.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow1);
//create row for password Textblock
RowDefinition gridRow2a = new RowDefinition();
gridRow2a.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow2a);
//create row for Confirm password
RowDefinition gridRow2 = new RowDefinition();
gridRow2.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow2);
//create row for email
RowDefinition gridRow3 = new RowDefinition();
gridRow3.Height = new GridLength(60);
MyGrid.RowDefinitions.Add(gridRow3);
//create row for << Sign Up >>
RowDefinition gridRow4 = new RowDefinition();
gridRow4.Height = new GridLength(120);
MyGrid.RowDefinitions.Add(gridRow4);
//create row for << Go Back >>
RowDefinition gridRow5 = new RowDefinition();
gridRow5.Height = new GridLength(120);
MyGrid.RowDefinitions.Add(gridRow5);
Grid.SetRow(title, 0);
Grid.SetColumn(title, 0);
Grid.SetRow(TbUN, 1);
Grid.SetColumn(TbUN, 0);
Grid.SetRow(TbPW, 2);
Grid.SetColumn(TbPW, 0);
Grid.SetRow(TbCPW, 3);
Grid.SetColumn(TbCPW, 0);
Grid.SetRow(TbEmail, 4);
Grid.SetColumn(TbEmail, 0);
Grid.SetRow(BtnSignUpSubmit, 5);
Grid.SetColumn(BtnSignUpSubmit, 0);
Grid.SetRow(BtnGoBack, 6);
Grid.SetColumn(BtnGoBack, 0);
MyGrid.Children.Add(title);
MyGrid.Children.Add(TbUN);
MyGrid.Children.Add(TbPW);
MyGrid.Children.Add(TbCPW);
MyGrid.Children.Add(TbEmail);
MyGrid.Children.Add(BtnSignUpSubmit);
MyGrid.Children.Add(BtnGoBack);
BtnSignUp.Content = "<< Sign Up >>";
private bool IsUsernameValid(string str)
int d;
if (str.Length > 30)
MessageBox.Show("You may only use a maximum of 30 characters for your Username.\nThank you.");
return false;
for (d = 0; d < str.Length; d++)
if (str.Contains("~") || str.Contains("!") || str.Contains("@") || str.Contains("$")
|| str.Contains("#") || str.Contains("%") || str.Contains("|") || str.Contains("_"))
MessageBox.Show("Your Username may not contain any of the follwing characters: \n~ ! @ # $ % | _\nThank you.");
return false;
return true;
private void BtnSignUpSubmit_Tab(object sender, RoutedEventArgs e)
//show error if Username == Username
if (TbUN.Text.ToString() == "Username")
MessageBox.Show("You must fill in your Username in the Username textbox.\nThank you.");
return;
//make sure all fields are filled in
if (TbUN.Text.ToString() == "" || TbPW.Text.ToString() == "" || TbCPW.Text.ToString() == "")
MessageBox.Show("All fields must be filled in.\nThank you.");
return;
//make sure Password is the same as Confirm Password
if (TbPW.Text.CompareTo(TbCPW.Text) != 0)
MessageBox.Show("Your Password should be the same as Confirm Password.\nThank you.");
return;
//make sure Username contains valid characters
bool bValid = IsUsernameValid(TbUN.Text);
if (bValid)
bSignUp = true;
//disable textboxes
TbUN.IsEnabled = false;
TbPW.IsEnabled = false;
TbCPW.IsEnabled = false;
TbEmail.IsEnabled = false;
BtnSignUpSubmit.IsEnabled = false;
title.Text = "requesting...";
//make Post request top-server
//add parameters
string data = "username="+TbUN.Text+"&Password="+TbPW.Text;
if(TbEmail.Text.Contains("@") && TbEmail.Text.Contains("."))
data += "&email=" + TbEmail.Text;
System.Uri URL = new Uri("http://www.iclips.co.za/RegisterUsernameAndPassword.php");
WebRequest webRequest = WebRequest.Create(URL);
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
webRequest.ContentLength = data.Length;
//we first obtain an input stream to which to write the body of the HTTP POST
webRequest.BeginGetRequestStream((IAsyncResult result) =>
HttpWebRequest preq = result.AsyncState as HttpWebRequest;
if (preq != null)
Stream postStream = preq.EndGetRequestStream(result);
//guess one could just accept a byte[] [via function argument] for arbitrary data types - images, audio,...
byte[] dataStream = Encoding.UTF8.GetBytes(data);
postStream.Write(dataStream, 0, dataStream.Length);
postStream.Close();
//we can then finalize the request...
preq.BeginGetResponse((IAsyncResult final_result) =>
HttpWebRequest req = final_result.AsyncState as HttpWebRequest;
if (req != null)
try
//we call the success callback as long as we get a response stream
WebResponse response = req.EndGetResponse(final_result);
success_callback(response.GetResponseStream());
catch (WebException we)
//otherwise call the error/failure callback
error_callback(we.Message);
return;
}, preq);
}, URL);
private void error_callback(string p)
if (bSignUp)
bSignUp = false;
// Show error message
MessageBox.Show("Connection Error!\n\n" + p);
//enable input
//disable textboxes
TbUN.IsEnabled = true;
TbPW.IsEnabled = true;
TbCPW.IsEnabled = true;
TbEmail.IsEnabled = true;
BtnSignUpSubmit.IsEnabled = false;
title.Text = "try again";
private void success_callback(Stream stream)
if (bSignUp)
bSignUp = false;
// Open the stream using a StreamReader for easy access.
StreamReader reader = new StreamReader(stream);
// Read the content.
string response = reader.ReadToEnd();
// Display the content.
MessageBox.Show(response);
// Clean up the streams.
reader.Close();
private void BtnGoBack_Tab(object sender, RoutedEventArgs e)
SignIn();
private void TbEmail_Tap(object sender, System.Windows.Input.GestureEventArgs e)
TbEmail.SelectAll();
private void TbCPW_Tap(object sender, System.Windows.Input.GestureEventArgs e)
TbCPW.SelectAll();
private void SignIn_Tab(object sender, RoutedEventArgs e)
if (TbUN.Text.ToString() == "" || TbPW.Text.ToString() == "")
MessageBox.Show("Your Username or Password cannot be empty.\nThank you.");
return;
private void TbUN_Tap(object sender, System.Windows.Input.GestureEventArgs e)
TbUN.SelectAll();
un.Text = "Usernames are Case-Sensitive.\n'Iclips' is not the same as 'iClips'.";
private void TbPW_Tap(object sender, System.Windows.Input.GestureEventArgs e)
TbPW.SelectAll();
protected override void OnNavigatedTo(NavigationEventArgs e)
base.OnNavigatedTo(e);
// Initialize the video recorder.
InitializeVideoRecorder();
CameraButtons.ShutterKeyHalfPressed += OnButtonHalfPress;
// The event is fired when the shutter button receives a full press.
CameraButtons.ShutterKeyPressed += OnButtonFullPress;
// The event is fired when the shutter button is released.
CameraButtons.ShutterKeyReleased += OnButtonRelease;
protected override void OnNavigatedFrom(NavigationEventArgs e)
// Dispose of camera and media objects.
DisposeVideoPlayer();
DisposeVideoRecorder();
base.OnNavigatedFrom(e);
CameraButtons.ShutterKeyHalfPressed -= OnButtonHalfPress;
CameraButtons.ShutterKeyPressed -= OnButtonFullPress;
CameraButtons.ShutterKeyReleased -= OnButtonRelease;
// Ensure that the viewfinder is upright in LandscapeRight.
protected override void OnOrientationChanged(OrientationChangedEventArgs e)
if (vcDevice != null)
if (e.Orientation == PageOrientation.LandscapeLeft)
txtDebug.Text = "LandscapeLeft";
videoRecorderBrush.RelativeTransform =
new CompositeTransform() { CenterX = 0.5, CenterY = 0.5, Rotation = 90 };
//rotate logo
if (logo != null)
RotateTransform rt = new RotateTransform();
rt.Angle = 90;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
logo.RenderTransformOrigin = new Point(0.5, 0.5);
logo.RenderTransform = rt;
//rotate sign in link
if (MyGrid != null)
RotateTransform rt = new RotateTransform();
rt.Angle = 90;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
MyGrid.RenderTransformOrigin = new Point(0.5, 0.5);
MyGrid.RenderTransform = rt;
if (e.Orientation == PageOrientation.PortraitUp)
txtDebug.Text = "PortraitUp";
videoRecorderBrush.RelativeTransform =
new CompositeTransform() { CenterX = 0.5, CenterY = 0.5, Rotation = 0 };
//rotate logo
if (logo != null)
RotateTransform rt = new RotateTransform();
rt.Angle = 0;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
logo.RenderTransformOrigin = new Point(0.5, 0.5);
logo.RenderTransform = rt;
//rotate sign in link
if (MyGrid != null)
RotateTransform rt = new RotateTransform();
rt.Angle = 0;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
MyGrid.RenderTransformOrigin = new Point(0.5, 0.5);
MyGrid.RenderTransform = rt;
if (e.Orientation == PageOrientation.LandscapeRight)
txtDebug.Text = "LandscapeRight";
// Rotate for LandscapeRight orientation.
//videoRecorderBrush.RelativeTransform =
//new CompositeTransform() { CenterX = 0.5, CenterY = 0.5, Rotation = 180 };
//rotate logo
if (logo != null)
RotateTransform rt = new RotateTransform();
rt.Angle = -90;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
logo.RenderTransformOrigin = new Point(0.5, 0.5);
logo.RenderTransform = rt;
//rotate sign in link
if (MyGrid != null)
RotateTransform rt = new RotateTransform();
rt.Angle = -90;
//default rotation is around top left corner of the control,
//but you sometimes want to rotate around the center of the control
//to do that, you need to set the RenderTransFormOrigin
//of the item you're going to rotate
//I did not test this approach, maybe You're going to need to use actual coordinates
//so this bit is for information purposes only
MyGrid.RenderTransformOrigin = new Point(0.5, 0.5);
MyGrid.RenderTransform = rt;
if (e.Orientation == PageOrientation.PortraitDown)
txtDebug.Text = "PortraitDown";
videoRecorderBrush.RelativeTransform =
new CompositeTransform() { CenterX = 0.5, CenterY = 0.5, Rotation = 270 };
// Provide auto-focus with a half button press using the hardware shutter button.
private void OnButtonHalfPress(object sender, EventArgs e)
// Focus when a capture is not in progress.
try
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "Half Button Press: Auto Focus";
catch (Exception focusError)
// Cannot focus when a capture is in progress.
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = focusError.Message;
// Capture the image with a full button press using the hardware shutter button.
private void OnButtonFullPress(object sender, EventArgs e)
// Focus when a capture is not in progress.
try
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "Full Button Press: Auto Focus";
catch (Exception focusError)
// Cannot focus when a capture is in progress.
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = focusError.Message;
// Cancel the focus if the half button press is released using the hardware shutter button.
private void OnButtonRelease(object sender, EventArgs e)
try
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "Shutter is released: Auto Focus";
catch (Exception focusError)
// Cannot focus when a capture is in progress.
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = focusError.Message;
// Update the buttons and text on the UI thread based on app state.
private void UpdateUI(ButtonState currentButtonState, string statusMessage)
// Run code on the UI thread.
Dispatcher.BeginInvoke(delegate
switch (currentButtonState)
// When the camera is not supported by the phone.
case ButtonState.CameraNotSupported:
StartRecording.IsEnabled = false;
StopPlaybackRecording.IsEnabled = false;
StartPlayback.IsEnabled = false;
PausePlayback.IsEnabled = false;
break;
// First launch of the application, so no video is available.
case ButtonState.Initialized:
StartRecording.IsEnabled = true;
StopPlaybackRecording.IsEnabled = false;
StartPlayback.IsEnabled = false;
PausePlayback.IsEnabled = false;
break;
// Ready to record, so video is available for viewing.
case ButtonState.Ready:
StartRecording.IsEnabled = true;
StopPlaybackRecording.IsEnabled = false;
StartPlayback.IsEnabled = true;
PausePlayback.IsEnabled = false;
break;
// Video recording is in progress.
case ButtonState.Recording:
StartRecording.IsEnabled = false;
StopPlaybackRecording.IsEnabled = true;
StartPlayback.IsEnabled = false;
PausePlayback.IsEnabled = false;
break;
// Video playback is in progress.
case ButtonState.Playback:
StartRecording.IsEnabled = false;
StopPlaybackRecording.IsEnabled = true;
StartPlayback.IsEnabled = false;
PausePlayback.IsEnabled = true;
break;
// Video playback has been paused.
case ButtonState.Paused:
StartRecording.IsEnabled = false;
StopPlaybackRecording.IsEnabled = true;
StartPlayback.IsEnabled = true;
PausePlayback.IsEnabled = false;
break;
default:
break;
// Display a message.
txtDebug.Text = statusMessage;
// Note the current application state.
currentAppState = currentButtonState;
public void InitializeVideoRecorder()
if (captureSource == null)
// Create the VideoRecorder objects.
captureSource = new CaptureSource();
fileSink = new FileSink();
vcDevice = CaptureDeviceConfiguration.GetDefaultVideoCaptureDevice();
// Add eventhandlers for captureSource.
captureSource.CaptureFailed += new EventHandler<ExceptionRoutedEventArgs>(OnCaptureFailed);
// Initialize the camera if it exists on the phone.
if (vcDevice != null)
// Create the VideoBrush for the viewfinder.
videoRecorderBrush = new VideoBrush();
videoRecorderBrush.SetSource(captureSource);
// Display the viewfinder image on the rectangle.
viewfinderRectangle.Fill = videoRecorderBrush;
// Start video capture and display it on the viewfinder.
captureSource.Start();
// Set the button state and the message.
UpdateUI(ButtonState.Initialized, "Tap record to start recording...");
else
// Disable buttons when the camera is not supported by the phone.
UpdateUI(ButtonState.CameraNotSupported, "A camera is not supported on this phone.");
// Set recording state: start recording.
private void StartVideoRecording()
try
// Connect fileSink to captureSource.
if (captureSource.VideoCaptureDevice != null
&& captureSource.State == CaptureState.Started)
captureSource.Stop();
// Connect the input and output of fileSink.
fileSink.CaptureSource = captureSource;
fileSink.IsolatedStorageFileName = isoVideoFileName;
// Begin recording.
if (captureSource.VideoCaptureDevice != null
&& captureSource.State == CaptureState.Stopped)
captureSource.Start();
// Set the button states and the message.
UpdateUI(ButtonState.Recording, "Recording...");
StartTimer();
// If recording fails, display an error.
catch (Exception e)
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "ERROR: " + e.Message.ToString();
//start the timer
private void StartTimer()
dispatcherTimer = new System.Windows.Threading.DispatcherTimer();
dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick);
dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
dispatcherTimer.Start();
startTime = System.DateTime.Now;
private void StopTimer()
dispatcherTimer.Stop();
private void dispatcherTimer_Tick(object sender, EventArgs e)
System.DateTime now = System.DateTime.Now;
txtRecTime.Text = now.Subtract(startTime).ToString();
// Set the recording state: stop recording.
private void StopVideoRecording()
try
// Stop recording.
if (captureSource.VideoCaptureDevice != null
&& captureSource.State == CaptureState.Started)
captureSource.Stop();
// Disconnect fileSink.
fileSink.CaptureSource = null;
fileSink.IsolatedStorageFileName = null;
// Set the button states and the message.
UpdateUI(ButtonState.Stopped, "Preparing viewfinder...");
StopTimer();
StartVideoPreview();
// If stop fails, display an error.
catch (Exception e)
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "ERROR: " + e.Message.ToString();
// Set the recording state: display the video on the viewfinder.
private void StartVideoPreview()
try
// Display the video on the viewfinder.
if (captureSource.VideoCaptureDevice != null
&& captureSource.State == CaptureState.Stopped)
// Add captureSource to videoBrush.
videoRecorderBrush.SetSource(captureSource);
// Add videoBrush to the visual tree.
viewfinderRectangle.Fill = videoRecorderBrush;
captureSource.Start();
// Set the button states and the message.
UpdateUI(ButtonState.Ready, "Ready to record.");
// If preview fails, display an error.
catch (Exception e)
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "ERROR: " + e.Message.ToString();
// Start the video recording.
private void StartRecording_Click(object sender, EventArgs e)
// Avoid duplicate taps.
StartRecording.IsEnabled = false;
StartVideoRecording();
// Handle stop requests.
private void StopPlaybackRecording_Click(object sender, EventArgs e)
// Avoid duplicate taps.
StopPlaybackRecording.IsEnabled = false;
// Stop during video recording.
if (currentAppState == ButtonState.Recording)
StopVideoRecording();
// Set the button state and the message.
UpdateUI(ButtonState.NoChange, "Recording stopped.");
// Stop during video playback.
else
// Remove playback objects.
DisposeVideoPlayer();
StartVideoPreview();
// Set the button state and the message.
UpdateUI(ButtonState.NoChange, "Playback stopped.");
// Start video playback.
private void StartPlayback_Click(object sender, EventArgs e)
// Avoid duplicate taps.
StartPlayback.IsEnabled = false;
// Start video playback when the file stream exists.
if (isoVideoFile != null)
VideoPlayer.Play();
// Start the video for the first time.
else
// Stop the capture source.
captureSource.Stop();
// Remove VideoBrush from the tree.
viewfinderRectangle.Fill = null;
// Create the file stream and attach it to the MediaElement.
isoVideoFile = new IsolatedStorageFileStream(isoVideoFileName,
FileMode.Open, FileAccess.Read,
IsolatedStorageFile.GetUserStoreForApplication());
VideoPlayer.SetSource(isoVideoFile);
// Add an event handler for the end of playback.
VideoPlayer.MediaEnded += new RoutedEventHandler(VideoPlayerMediaEnded);
// Start video playback.
VideoPlayer.Play();
// Set the button state and the message.
UpdateUI(ButtonState.Playback, "Playback started.");
// Pause video playback.
private void PausePlayback_Click(object sender, EventArgs e)
// Avoid duplicate taps.
PausePlayback.IsEnabled = false;
// If mediaElement exists, pause playback.
if (VideoPlayer != null)
VideoPlayer.Pause();
// Set the button state and the message.
UpdateUI(ButtonState.Paused, "Playback paused.");
private void DisposeVideoPlayer()
if (VideoPlayer != null)
// Stop the VideoPlayer MediaElement.
VideoPlayer.Stop();
// Remove playback objects.
VideoPlayer.Source = null;
isoVideoFile = null;
// Remove the event handler.
VideoPlayer.MediaEnded -= VideoPlayerMediaEnded;
private void DisposeVideoRecorder()
if (captureSource != null)
// Stop captureSource if it is running.
if (captureSource.VideoCaptureDevice != null
&& captureSource.State == CaptureState.Started)
captureSource.Stop();
// Remove the event handler for captureSource.
captureSource.CaptureFailed -= OnCaptureFailed;
// Remove the video recording objects.
captureSource = null;
vcDevice = null;
fileSink = null;
videoRecorderBrush = null;
// If recording fails, display an error message.
private void OnCaptureFailed(object sender, ExceptionRoutedEventArgs e)
this.Dispatcher.BeginInvoke(delegate()
txtDebug.Text = "ERROR: " + e.ErrorException.Message.ToString();
// Display the viewfinder when playback ends.
public void VideoPlayerMediaEnded(object sender, RoutedEventArgs e)
// Remove the playback objects.
DisposeVideoPlayer();
StartVideoPreview();
public void SetScreenResolution()
w = Application.Current.Host.Content.ActualWidth;
h = Application.Current.Host.Content.ActualHeight;
setResViewF(w, h);
public void setResViewF(double width, double height)
viewfinderRectangle.Width = width;
viewfinderRectangle.Height = height;
resMI.Content = "resolution: " + width + "*" + height;
private void resMI_Click(object sender, RoutedEventArgs e)
switch (resMI.Content.ToString())
case "resolution: 176*220":
setResViewF(240, 320);
break;
case "resolution: 240*320":
setResViewF(360, 480);
break;
case "resolution: 360*480":
setResViewF(480, 800);
break;
case "resolution: 480*800":
setResViewF(1440, 720);
break;
case "resolution: 1440*720":
setResViewF(1920, 1080);
break;
case "resolution: 1920*1080":
setResViewF(176, 220);
break;
default:
setResViewF(176, 220);
break;
public void WriteToFile(string key, string value)
var Iso_settings = System.IO.IsolatedStorage.IsolatedStorageSettings.ApplicationSettings;
if (!Iso_settings.Contains(key))
Iso_settings.Add(key, value);
Iso_settings.Save();//This will save your data in isolated storage.
public string ReadFromFile(string key)
var Iso_settings = System.IO.IsolatedStorage.IsolatedStorageSettings.ApplicationSettings;
if (Iso_settings.Contains(key))
return (string)Iso_settings[key];
else
return null;
public DispatcherTimer dispatcherTimer { get; set; }
private void ToggleZoom(MediaElement media)
if (media.Stretch != Stretch.UniformToFill)
// zoom
media.Stretch = Stretch.UniformToFill;
else
// unzoom
media.Stretch = Stretch.Uniform;
BtnSignUpSubmit_Tab is the HyperLinkButton that would trigger the web request process. I need this code to work perfectly because a lot of people will use this. If you can simplify the http web request that already feels so good. Thank you.