C# Websocket programming: the simplest example

Create a winform Application:

Download the Websocket-Sharp from Nuget:

PM> Install-Package WebSocketSharp -Pre

Add below code:

        private WebSocket client;
        const string host = “wss://echo.websocket.org”;

        private void Form1_Load(object sender, EventArgs e)
        {
            client = new WebSocket(host);

            client.OnOpen += (ss, ee) =>
               listBox1.Items.Add(string.Format(“Connected to {0} successfully “, host));
            client.OnError += (ss, ee) =>
               listBox1.Items.Add(”     Error: “ + ee.Message);
            client.OnMessage += (ss, ee) =>
               listBox1.Items.Add(“Echo: “ + ee.Data);
            client.OnClose += (ss, ee) =>
               listBox1.Items.Add(string.Format(“Disconnected with {0}”, host));
        }

Add below button click event handler:

        private void SendButton_Click(object sender, EventArgs e)
        {
            var content = inputBox.Text;
            if(!string.IsNullOrEmpty(content))
                client.Send(content);
        }

        private void ConnectButton_Click(object sender, EventArgs e)
        {
            client.Connect();
        }

        private void DisconnectButton_Click(object sender, EventArgs e)
        {
            client.Close();
        }

That is it! Run your app and enjoy!