Event not firing in following code:
private WebSocketSharp.WebSocket client;
private void GetWebsocketFeedMessages()
{
string host = "wss://ws-feed.gdax.com";
client = new WebSocket(host);
client.Connect();
client.OnOpen += client_OnOpen;
client.OnMessage += client_OnMessage;
}
void client_OnMessage(object sender, MessageEventArgs e)
{
string response = e.Data;
}
void client_OnOpen(object sender, EventArgs e)
{
client.Send("{ \"type\": \"subscribe\", \"product_ids\": [ \"ETH-USD\" ] }");
}
I am using vs2012 framework 4.5 and windows application. But not able to reach the line in open and messages events. Not ure what mistake I am making, can anybody please advise?
First, you should setup events and after that call connect method, because it works synchronously.
private void GetWebsocketFeedMessages()
{
string host = "wss://ws-feed.gdax.com";
client = new WebSocket(host);
client.OnOpen += client_OnOpen;
client.OnMessage += client_OnMessage;
client.Connect();
}
Related
I am confused how to add parameters to the DataReceived SimpleTCP event handler.
Here's my coding:
private void Form1_Load(object sender, EventArgs e)
{
server = new SimpleTcpServer();
server.Delimiter = 0x13; //Enter
server.StringEncoder = System.Text.ASCIIEncoding.ASCII;
server.DataReceived += Server_DataReceived;
server.ClientConnected += Server_ClientConnected;
server.ClientDisconnected += Server_ClientDisconnected;
}
Call Event Handler DataReceived
server.DataReceived += Server_DataReceived;
And this code function Server_DataReceived
private void Server_DataReceived(object sender, SimpleTCP.Message e, TcpClient client)
{
listView1.Invoke((MethodInvoker)delegate ()
{
string json = e.MessageString.Remove(e.MessageString.Length - 1);
S3Object s3obj = JsonConvert.DeserializeObject<S3Object>(json);
ListViewItem lv = new ListViewItem(s3obj.id);
lv.SubItems.Add(s3obj.bucket);
lv.SubItems.Add(s3obj.objects);
listView1.Items.Add(lv);
});
}
I have error in this
Error on server.DataReceived += Server_DataReceived;
Thanks guys
I assume you use the SimpleTCP Library by BrandonPotter.
Please add information about used 3rd party libraries in your Question, as it makes it a lot easier for others to help.
The Message object passed in the DataReceived and DelimiterDataReceived event contains a property TcpClient that is the information you need. Therefore you need no additional parameter.
I think you would better use DelimiterDataReceived, therefore your code would look like this:
private void Server_DelimiterReceived(object sender, SimpleTCP.Message e, TcpClient client)
{
listView1.Invoke((MethodInvoker)delegate ()
{
string json = e.MessageString;
S3Object s3obj = JsonConvert.DeserializeObject<S3Object>(json);
ListViewItem lv = new ListViewItem(s3obj.id);
lv.SubItems.Add(s3obj.bucket);
lv.SubItems.Add(s3obj.objects);
listView1.Items.Add(lv);
TcpClient client = e.TcpClient;
// do something with the client...
});
}
Im trying to download files using extended WebClient with set timeout and I have a problem with the timeout (or what I think should cause timeout).
When I start the download with WebClient and receive some data, then disconnect wifi - my program hangs on the download without throwing any exception. How can I fix this?
EDIT: It actually throws exception but way later than it should (5 minutes vs 1 second which i set) - that is what Im trying to fix.
If you find anything else wrong with my code, please let me know too. Thank you for help
This is my extended class
class WebClientWithTimeout : WebClient
{
protected override WebRequest GetWebRequest(Uri address)
{
WebRequest w = base.GetWebRequest(address);
w.Timeout = 1000;
return w;
}
}
This is the download
using (WebClientWithTimeout wct = new WebClientWithTimeout())
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
try
{
wct.DownloadFile("https://example.com", file);
}
catch (Exception e)
{
Console.WriteLine("Download: {0} failed with exception:{1} {2}", file, Environment.NewLine, e);
}
}
Try this, you can avoid UI blocking by this. Coming the WiFi when device connects to WiFi the download resumes.
//declare globally
DateTime lastDownloaded = DateTime.Now;
Timer t = new Timer();
WebClient wc = new WebClient();
//declarewherever you initiate download my case button click
private void button1_Click(object sender, EventArgs e)
{
wc.DownloadProgressChanged += Wc_DownloadProgressChanged;
wc.DownloadFileCompleted += Wc_DownloadFileCompleted;
lastDownloaded = DateTime.Now;
t.Interval = 1000;
t.Tick += T_Tick;
wc.DownloadFileAsync(new Uri("https://github.com/google/google-api-dotnet-client/archive/master.zip"), #"C:\Users\chkri\AppData\Local\Temp\master.zip");
}
private void T_Tick(object sender, EventArgs e)
{
if ((DateTime.Now - lastDownloaded).TotalMilliseconds > 1000)
{
wc.CancelAsync();
}
}
private void Wc_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
{
if (e.Error != null)
{
lblProgress.Text = e.Error.Message;
}
}
private void Wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
lastDownloaded = DateTime.Now;
lblProgress.Text = e.BytesReceived + "/" + e.TotalBytesToReceive;
}
I am trying to write a program that communicates with a controller. The controller is supposed to send a "welcome" message when a connection is successfully established and, in fact, it does when I connect using a communications software. However, using the .NET code below, I never see the welcome message. Beyond that, it works. How can I capture this message. It seems to be sent the moment the connection is established.
Again, I am able to communicate fine with the controller after connection but I simply cannot seem to get the welcome message that is sent a the moment the connection is opened.
using System;
using System.IO.Ports;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public delegate void AddDataDelegate(String myString);
public AddDataDelegate myDelegate;
SerialPort sp;
public Form1()
{
InitializeComponent();
}
public void AddDataMethod(String myString)
{
richTextBox1.AppendText(myString);
richTextBox1.SelectionStart = richTextBox1.Text.Length;
richTextBox1.ScrollToCaret();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
sp = new SerialPort(comboBox1.SelectedItem.ToString(),Int32.Parse(comboBox2.SelectedItem.ToString()));
sp.DataReceived += SerialPort_OnDataReceived;
sp.Close();
sp.Open();
richTextBox1.AppendText("open\n");
button2.Enabled = true;
button3.Enabled = true;
}
catch (Exception ex)
{
richTextBox1.AppendText(ex.Message);
}
}
void SerialPort_OnDataReceived(object sender,SerialDataReceivedEventArgs args)
{
SerialPort sp = sender as SerialPort;
string s = sp.ReadExisting();
richTextBox1.Invoke(this.myDelegate, new Object[] { s });
}
private void button2_Click(object sender, EventArgs e)
{
sp.WriteLine(textBox1.Text);
textBox1.Text = "";
}
private void button3_Click(object sender, EventArgs e)
{
sp.DiscardOutBuffer();
sp.DiscardInBuffer();
sp.Close();
richTextBox1.AppendText("\nclosed\n");
}
private void Form1_Load_1(object sender, EventArgs e)
{
this.myDelegate = new AddDataDelegate(AddDataMethod);
string[] Ports = SerialPort.GetPortNames();
comboBox2.SelectedIndex = comboBox2.Items.Count - 1;
Array.Sort(Ports, (a, b) => string.Compare(a.Substring(3).PadLeft(3, '0'), b.Substring(3).PadLeft(3, '0')));
foreach (string port in Ports)
{
comboBox1.Items.Add(port);
}
comboBox1.SelectedIndex = 0;
}
}
}
I worked it out. Required a slight delay between connection and trying to pull data from the port.
i'm newbie in C# serial port...
i have a virtual serial port driver and try this code...
private string strPortData = null;
private void okButton_Click(object sender, EventArgs e)
{
if (!serialPort1.IsOpen)
{
serialPort1.Open();
}
string strPortData= "CMD1";
serialPort1.WriteLine(strPortData);
}
private void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
textBox1.Text = serialPort1.ReadLine();
}
but do not serialPort1_DataReceived ever call.
What should i do for call DataReceived?
Try creating a new console application with code similar to the following
void Main()
{
using (SerialPort serialPort1 = new SerialPort("COM1"))
using (SerialPort serialPort2 = new SerialPort("COM2"))
{
serialPort1.DataReceived += (sender, args) => {
Console.WriteLine("COM1 Received: " + serialPort1.ReadLine());
};
serialPort2.DataReceived += (sender, args) => {
Console.WriteLine("COM2 Received: " + serialPort2.ReadLine());
};
serialPort1.Open();
serialPort2.Open();
serialPort1.WriteLine("Hello, COM2!");
Thread.Sleep(200);
}
}
The above code opens both serial ports, sets up the data received events, and sends data through it. If you run that code you should see "COM2 Received: Hello, COM2!" output.
I've just downloaded the MSNP-Sharp library with the aim of creating my own messaging client, however I am struggling to get the example to sign in. The code all compiles and runs, but when I provide my login details and select "Login" I almost immediately get the following SocketException:
"No connection could be made because the target machine actively refused it 64.4.9.254:1863"
I've stepped through the code and it's the messenger.Connect() function that is causing this, somewhat obviously. When I run the example I only change the login and password details. I am running Windows 7 x86 with the latest version of Windows Live Messenger.
I have tried disabling my antivirus, even going as far as to temporarily uninstall it in case that was the error.
I have also tried disabling Windows Firewall, with no luck.
Firstly, use the stable version of MSNPSharp (that is, 3.0). Since it is a SocketException, this may relate to a problem within the internet protocol (a firewall for instance). Try to ensure that nothing is blocking the program from accessing to the MSN protocol. Since you have said you have disabled your Windows Firewall, could there be anything else that could be blocking it?
Secondly, have you tried using MSN Messenger Live for a test. If that works, MSNPSharp client should probably work too. Ensure you have .NET Framework 2.0 or within their version of the .NET Framework. If it constantly appears to be a problem, I don't believe this is a problem from the MSNPSharp client (I'm not sure however).
here is a demo,i hope it would be useful
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing.Color;
namespace MSNRobot
{
using MSNPSharp;
using MSNPSharp.Core;
using MSNPSharp.DataTransfer;
class RobotConversation
{
private Conversation _conversation = null;
private RobotMain _robotmain = null;
public RobotConversation(Conversation conv, RobotMain robotmain)
{
Console.WriteLine("==> Struct a conversation");
_conversation = conv;
_conversation.Switchboard.TextMessageReceived += new EventHandler<TextMessageEventArgs>(Switchboard_TextMessageReceived);
_conversation.Switchboard.SessionClosed += new EventHandler<EventArgs>(Switchboard_SessionClosed);
_conversation.Switchboard.ContactLeft += new EventHandler<ContactEventArgs>(Switchboard_ContactLeft);
_robotmain = robotmain;
}
//online status
private void Switchboard_TextMessageReceived(object sender, TextMessageEventArgs e)
{
Console.WriteLine("==>Received Msg From " + e.Sender.Mail + " Content:\n" + e.Message.Text);
//echo back ///////////// TODO /////////////////
_conversation.Switchboard.SendTextMessage(e.Message);
}
private void Switchboard_SessionClosed(object sender, EventArgs e)
{
Console.WriteLine("==>Session Closed, Remove conversation");
_conversation.Switchboard.Close();
_conversation = null;
_robotmain.RobotConvlist.Remove(this);
}
private void Switchboard_ContactLeft(object sender, ContactEventArgs e)
{
Console.WriteLine("==>Contact Left.");
}
}
class RobotMain
{
private Messenger messenger = new Messenger();
private List<RobotConversation> _convs = new List<RobotConversation>(0);
public RobotMain()
{
messenger.NameserverProcessor.ConnectionEstablished += new EventHandler<EventArgs>(NameserverProcessor_ConnectionEstablished);
messenger.Nameserver.SignedIn += new EventHandler<EventArgs>(Nameserver_SignedIn);
messenger.Nameserver.SignedOff += new EventHandler<SignedOffEventArgs>(Nameserver_SignedOff);
messenger.NameserverProcessor.ConnectingException += new EventHandler<ExceptionEventArgs>(NameserverProcessor_ConnectingException);
messenger.Nameserver.ExceptionOccurred += new EventHandler<ExceptionEventArgs>(Nameserver_ExceptionOccurred);
messenger.Nameserver.AuthenticationError += new EventHandler<ExceptionEventArgs>(Nameserver_AuthenticationError);
messenger.Nameserver.ServerErrorReceived += new EventHandler<MSNErrorEventArgs>(Nameserver_ServerErrorReceived);
messenger.Nameserver.ContactService.ReverseAdded += new EventHandler<ContactEventArgs>(Nameserver_ReverseAdded);
messenger.ConversationCreated += new EventHandler<ConversationCreatedEventArgs>(messenger_ConversationCreated);
messenger.Nameserver.OIMService.OIMReceived += new EventHandler<OIMReceivedEventArgs>(Nameserver_OIMReceived);
messenger.Nameserver.OIMService.OIMSendCompleted += new EventHandler<OIMSendCompletedEventArgs>(OIMService_OIMSendCompleted);
}
public List<RobotConversation> RobotConvlist
{
get
{
return _convs;
}
}
private void NameserverProcessor_ConnectionEstablished(object sender, EventArgs e)
{
//messenger.Nameserver.AutoSynchronize = true;
Console.WriteLine("==>Connection established!");
}
private void Nameserver_SignedIn(object sender, EventArgs e)
{
messenger.Owner.Status = PresenceStatus.Online;
Console.WriteLine("==>Signed into the messenger network as " + messenger.Owner.Name);
}
private void Nameserver_SignedOff(object sender, SignedOffEventArgs e)
{
Console.WriteLine("==>Signed off from the messenger network");
}
private void NameserverProcessor_ConnectingException(object sender, ExceptionEventArgs e)
{
//MessageBox.Show(e.Exception.ToString(), "Connecting exception");
Console.WriteLine("==>Connecting failed");
}
private void Nameserver_ExceptionOccurred(object sender, ExceptionEventArgs e)
{
// ignore the unauthorized exception, since we're handling that error in another method.
if (e.Exception is UnauthorizedException)
return;
Console.WriteLine("==>Nameserver exception:" + e.Exception.ToString());
}
private void Nameserver_AuthenticationError(object sender, ExceptionEventArgs e)
{
Console.WriteLine("==>Authentication failed:" + e.Exception.InnerException.Message);
}
private void Nameserver_ServerErrorReceived(object sender, MSNErrorEventArgs e)
{
// when the MSN server sends an error code we want to be notified.
Console.WriteLine("==>Server error received:" + e.MSNError.ToString());
}
void Nameserver_ReverseAdded(object sender, ContactEventArgs e)
{
//Contact contact = e.Contact;
//contact.OnAllowedList = true;
//contact.OnPendingList = false;
//messenger.Nameserver.ContactService.AddNewContact(contact.Mail);
Console.WriteLine("==>ReverseAdded contact mail:" + e.Contact.Mail);
//messenger.Nameserver.AddNewContact(
e.Contact.OnAllowedList = true;
e.Contact.OnForwardList = true;
}
private void messenger_ConversationCreated(object sender, ConversationCreatedEventArgs e)
{
Console.WriteLine("==>Conversation created");
_convs.Add(new RobotConversation(e.Conversation, this));
}
//offline status
void Nameserver_OIMReceived(object sender, OIMReceivedEventArgs e)
{
Console.WriteLine("==>OIM received at : " + e.ReceivedTime + " From : " +
e.NickName + " (" + e.Email + ") " + e.Message);
TextMessage message = new TextMessage(e.Message);
message.Font = "Trebuchet MS";
//message.Color = Color.Brown;
message.Decorations = TextDecorations.Bold;
Console.WriteLine("==>Echo back");
messenger.OIMService.SendOIMMessage(e.Email, message.Text);
}
void OIMService_OIMSendCompleted(object sender, OIMSendCompletedEventArgs e)
{
if (e.Error != null)
{
Console.WriteLine("OIM Send Error:" + e.Error.Message);
}
}
public void BeginLogin(string account, string password)
{
if (messenger.Connected)
{
Console.WriteLine("==>Disconnecting from server");
messenger.Disconnect();
}
// set the credentials, this is ofcourse something every MSNPSharp program will need to implement.
messenger.Credentials = new Credentials(account, password, MsnProtocol.MSNP16);
// inform the user what is happening and try to connecto to the messenger network.
Console.WriteLine("==>Connecting to server...");
messenger.Connect();
//displayImageBox.Image = global::MSNPSharpClient.Properties.Resources.loading;
//loginButton.Tag = 1;
//loginButton.Text = "Cancel";
// note that Messenger.Connect() will run in a seperate thread and return immediately.
// it will fire events that informs you about the status of the connection attempt.
// these events are registered in the constructor.
}
/// <summary>
/// main()
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
string robot_acc = "";
string robot_passwd = "";
if (args.Length == 0)
{
Console.WriteLine("USAGE:MSNRobot.exe <msn_account> [password]");
return;
}
robot_acc = args[0];
if (args.Length == 2)
robot_passwd = args[1];
else
{
Console.WriteLine("Password for " + robot_acc + ":");
robot_passwd = Console.ReadLine();
}
RobotMain app = new RobotMain();
app.BeginLogin(robot_acc, robot_passwd);
while (true)
{
Console.WriteLine("I am a MSN robot:" + robot_acc);
Console.ReadLine();
}
}
}
}
Have you tried the example client for MSNPSharp?