I'm building a windows phone application connected with parse server I want know could I recieve push notifications from the server (I send the notification from the server but I don't recieve it and the connection is fine with the server because I can send objects and the server recieve them perfectly). I made many reseaches I found a piece of code but I didn't know where to put it so I put it on a button click like this:
private async void Button_Click_3(object sender, RoutedEventArgs e)
{
try
{
var installation = ParseInstallation.CurrentInstallation;
installation.AddUniqueToList("channels", "Giants");
await installation.SaveAsync();
MessageBox.Show("Done ! ");
ParsePush.ToastNotificationReceived += ParsePushOnToastNotificationReceived;
await ParseAnalytics.TrackAppOpenedAsync();
MessageBox.Show("Done ! ");
}
catch (Exception ex)
{
}
}
void ParsePushOnToastNotificationReceived(object sender, NotificationEventArgs notificationEventArgs)
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
// do anything
MessageBox.Show("got notification");
});
}
Related
If i run this code on console application:
static async Task Main(string[] _)
{
using var client = new WTelegram.Client();
var user = await client.LoginUserIfNeeded();
Console.WriteLine($"We are logged-in as {user.username ?? user.first_name + " " + user.last_name} (id {user.id})");
}
It will prompt interactively for App api_id and api_hash.
How can i Authorize user on winforms application?. So that i can input the api_id and api_hash through textbox
Edit: (Oct 2022) Latest version of the library has a simplified config system that makes it more easy to use in WinForms apps.
Please take a look at the example WinForms app provided in the repository that demonstrate how to proceed.
The original answer below is still valid but maybe more complex
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First, you should read WTelegramClient FAQ #3:
3. How to use the library in a WinForms or WPF application
The library should work without a problem in a GUI application.
The difficulty might be in your Config callback when the user must enter the verification code or password, as you can't use Console.ReadLine here.
An easy solution is to call Interaction.InputBox("Enter verification code") instead.
This might require adding a reference (and using) to the Microsoft.VisualBasic assembly.
A more complex solution requires the use of a ManualResetEventSlim that you will wait for in Config callback,
and when the user has provided the verification_code through your GUI, you "set" the event to release your Config callback so it can return the code.
Here is an example solution for your Form class with a ManualResetEventSlim and textboxes:
using Microsoft.VisualBasic;
using TL;
private readonly ManualResetEventSlim _codeReady = new ManualResetEventSlim();
private WTelegram.Client _client;
private User _user;
string Config(string what)
{
switch (what)
{
case "api_id": return textBoxApiID.Text;
case "api_hash": return textBoxApiHash.Text;
case "phone_number": return textBoxPhone.Text;
case "verification_code":
_codeReady.Reset();
_codeReady.Wait();
return textBoxCode.Text;
case "password": return Interaction.InputBox("Enter 2FA password");
default: return null;
};
}
private void textBoxCode_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == '\r') // pressing Return in the textboxCode
{
_codeReady.Set();
e.Handled = true;
}
}
private async void buttonLogin_Click(object sender, EventArgs e)
{
buttonLogin.Enabled = false;
_client = new WTelegram.Client(Config);
_user = await _client.LoginUserIfNeeded();
MessageBox.Show("We are now connected as " + _user);
}
private async void buttonGetChats_Click(object sender, EventArgs e)
{
if (_user == null) { MessageBox.Show("You must complete the login first."); return; }
var chats = await _client.Messages_GetAllChats(null);
MessageBox.Show(string.Join("\n", chats.chats.Values.Where(c => c.IsActive)));
}
I am developing a code that will allow me to send small amounts of data between my arduino mega and my windows 8.1 phone using a HC-05 bluetooth module.
Sending data from the phone to the arduino was pretty simple, but I am having a dire time attempting to read data that comes back from the arduino that I send on the serial port.
For testing purposes my code is simple, sending ascii charaters 'a' & 'b' to turn an LED on & off, this could not work any better, but I am having trouble trying to figure out how to correctly read the data that I send back to my phone.
I send a single arbitrary ascii character back to the phone but I cannot for the life of me figure out the correct way of reading this data from the bluetooth stream I have setup.
I have been trying for nearly two days, but everything I try ends up freezing my phone with no exceptions thrown? A lot of posts online send me to the Nokia dev site which is now inactive.
I have tried using the 'datareader' and the 'streamreader' classes to do this but it always freezes, does anyone know how to make this work? And why my streamreader keeps freezing my phone?
I have tried to annotate my code appropriatley (seen below). The problem occurs in the 'Tick' event handler at the bottom of the code.
(FYI: All capabilities have been added to the manifest files so this shouldn't be the problem).
Thank you.
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 Bluetooth_SL.Resources;
using Windows.Networking;
using Windows.Networking.Proximity;
using Windows.Networking.Sockets;
using Windows.Devices.Bluetooth;
using System.IO;
using Microsoft.Xna.Framework;
using System.Windows.Threading;
using Windows.Storage.Streams; // <-- for the datareader class
namespace Bluetooth_SL // silverlight, does this matter?
{
public partial class MainPage : PhoneApplicationPage
{
DispatcherTimer Timer = new DispatcherTimer();
StreamSocket socket = new StreamSocket();
StreamWriter writer;
StreamReader reader;
public MainPage()
{
InitializeComponent();
Timer.Interval = TimeSpan.FromMilliseconds(1000); // dispatcher timer used to check for incoming data from arduino
Timer.Tick += Timer_Tick; // event handler for dispatcher timer
}
protected override void OnNavigatedFrom(NavigationEventArgs e) // frees up memory
{
socket.Dispose();
}
private void Connect_But_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
ConnectToBluetooth();
}
private async void ConnectToBluetooth() // sets up the connection // this works fine
{
// Configure PeerFinder to search for all paired devices.
PeerFinder.AlternateIdentities["Bluetooth:Paired"] = "";
var pairedDevices = await PeerFinder.FindAllPeersAsync();
if (pairedDevices.Count == 0)
{
Debug_Block.Text = "No paired devices were found.";
}
else
{
Debug_Block.Text = "Found";
PeerInformation selectedDevice = pairedDevices[0]; // pick the first paired device
try // 'try' used in the case the socket has already been connected
{
await socket.ConnectAsync(selectedDevice.HostName, "1");
writer = new StreamWriter(socket.OutputStream.AsStreamForWrite());
writer.AutoFlush = true;
reader = new StreamReader(socket.InputStream.AsStreamForRead());
Debug_Block.Text = "Connected";
}
catch (Exception x)
{
Debug_Block.Text = x.ToString();
}
}
}
private void SendButton_Tap(object sender, System.Windows.Input.GestureEventArgs e) // this works perfectly
{
try { writer.WriteLine("a"); } // attempts to write the ascii 'a' to the arduino which turns on the on-board LED
catch { Debug_Block.Text = "Failed to write"; }
}
private void SendButton_Off_Tap(object sender, System.Windows.Input.GestureEventArgs e) // this works perfectly
{
try { writer.WriteLine("b"); } // attempts to write the ascii 'b' to the arduino which turns off the on-board LED
catch { Debug_Block.Text = "Failed to write"; }
}
private void ReadButtonToggle_Tap(object sender, System.Windows.Input.GestureEventArgs e) // toggles the timer on and off
{
if(Timer.IsEnabled == true)
{
Timer.Stop();
Debug_Block.Text = "Timer Stopped";
}
else
{
Timer.Start();
Debug_Block.Text = "Timer Started";
}
}
void Timer_Tick(object sender, EventArgs e) // THIS IS THE PROBLEM
{
Debug_Block.Text = "Tick";
Debug_Block.Text = reader.ReadLine(); // <-- ALWAYS FREEZES HERE
Timer.Stop(); // This line is temporary for debugging
}
}
}
I'm a little bit new to all of these technologies so I'll try to be as clear as I can.
I'm writing a windows phone app that sends data in string format to a server:
public class sendDataControl
{
private string response = "";
public void sendToServer(string FullSTR)
{
try
{
WebClient webClient = new WebClient();
Uri uri = new Uri("http://pricequeryserver.azurewebsites.net/api/ReceiptDataService/?incomingdata=");
webClient.UploadStringAsync(uri,FullSTR);
webClient.UploadStringCompleted += new UploadStringCompletedEventHandler(webClient_UploadStringCompleted);
}
catch (Exception ex)
...
...
}
}
void webClient_UploadStringCompleted(object sender, UploadStringCompletedEventArgs e)
{
if (e.Error != null)
{
responseXml=e.Error.Message;
MessageBox.Show(responseXml);
return;
}
else
{
responseXml = e.Result;
}
}
}
The server is an MVC4, basic, with api controller I added, that needs to get the data sent from the mobile.
As a test I'm just getting back a string that I send:
public class ReceiptDataServiceController : ApiController
{
private ReceiptContext db = new ReceiptContext();
...
...
public string GetDataFromMobile(string IncomingData)
{
return IncomingData;
}
}
While running the application I get an error via responseXml:
"The remote server returned an error: NotFound".
The server returns the right answer from all kinds of browsers, while on IIS and on the azure but not from the mobile emulator.
Any suggestions?
If you take a look at the documentation for UploadStringAsync overload you are using, you will notice that it sends data using POST method. While in your controller you have only implemented GET. And for your
You have to use other overload of UploadStringAsync, which lets you specify the HTTP VERB to use. And you must specify GET. Your client code should be converted to:
webClient.UploadStringAsync(uri,"GET", FullSTR);
And the best solution for simple GET operations like your is to actually use DownloadStringAsync:
var fullUri = new Uri("http://pricequeryserver.azurewebsites.net/api/ReceiptDataService/?incomingdata=" + FullStr);
webClient.DownloadStringAsync(fullUri);
Anyway, your question has nothing to do with Windows Azure, thus the removed tag.
I am using this piece of code to register the event and want to de-register Event after completing it's task but don't know how to do problem is that I am using local object for registering event..
code..
public void loadData()
{
//Here client is loacal object..
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(AccessTokenDownloadCompleted);
}
void AccessTokenDownloadCompleted(object sender, DownloadStringCompletedEventArgs e)
{
}
If I understood you correctly, you want to remove your event handler after the download is completed. To remove an event handler, all you need to do is:
client.DownloadStringCompleted -= new DownloadStringCompletedEventHandler(AccessTokenDownloadCompleted);
Note the -= instead of +=.
Place this code where the download completes and you should be fine.
Maybe you can try this:
public void loadData()
{
//Here client is loacal object..
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(AccessTokenDownloadCompleted);
}
void AccessTokenDownloadCompleted(object sender, DownloadStringCompletedEventArgs e)
{
Client client = sender as Client;
if(client != null)
client.DownloadStringCompleted -= new DownloadStringCompletedEventHandler(AccessTokenDownloadCompleted);
}
I'm developing app which connects to service and consume some JSON data. Consuming works great (JSON.net rocks) but I wonder where I should catch exception error annd show simple MessageBox? Tried in few places but still my app is closing. Or maybe I should do it based on json response which contain error tag? I think that normal error handling could be easier, but have blank spot in my mind now..
Code is below:
private void LoginLoginButton_Click(object sender, System.EventArgs e)
{
((ApplicationBarIconButton)ApplicationBar.Buttons[0]).IsEnabled = false;
ProgressOverlay.Show();
GenerateLoginString();
var w = new SharpGIS.GZipWebClient();
Observable.FromEvent<DownloadStringCompletedEventArgs>(w, "DownloadStringCompleted")
.Subscribe(r =>
{
var settings = IsolatedStorageSettings.ApplicationSettings;
var deserializedRootObject = JsonConvert.DeserializeObject<RootObject>(r.EventArgs.Result);
UserSettings us = new UserSettings()
{
first_name = deserializedRootObject.user.first_name,
last_name = deserializedRootObject.user.last_name,
user_id = deserializedRootObject.user_id,
};
settings.Add("UserSettings", us);
settings.Save();
});
w.DownloadStringAsync(new Uri(UserUri));
w.DownloadStringCompleted += new DownloadStringCompletedEventHandler(w_DownloadStringCompleted);
}
void w_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
}
If you mean you want to catch an exception which occurs in your web client call then it should be in the Error property of DownloadStringCompletedEventArgs.
void w_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if(e.Error != null)
{
MessageBox.Show("An error occurred!");
}
else
{
NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.Relative));
}
}
Solved!
I used try and catch in this case. Works perfect :)