Thursday, February 20, 2014

Send client message to server using SignalR method - Realtime Chat application on web in ASP.Net: Step 3

This will be my 3rd post on SignalR technology. In previous post I shown how to get server time using SignalR client method, which will be called from server side. Now I shall show how to transfer data between server and client.

This is very simple solution and it can do as same way as normal .Net method calling with parameter.

I am not explaining these code again as I did it last time.


using Microsoft.Owin;
using Owin;
[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
    public class Startup
        public void Configuration(IAppBuilder app)
            // Any connection or hub wire up and configuration should go here

ChatHub.cs file code:

using System;
using System.Web;
using Microsoft.AspNet.SignalR;
namespace SignalRChat
    public class ChatHub : Hub
        /// <summary>
        /// getservertime
        /// </summary>
        public void getservertime()
            Clients.Caller.serverresponse("This is server response. Server is calling client method from server. <br/> Server time is: " + DateTime.Now.ToShortTimeString());

        public void sendmessage(string usermessage)
            Clients.Caller.serverresponse(usermessage + " :This is server message <br/>");
In this code I have added new method "sendmessage(parameter1)" and it will call same client method to return data to client. This is very simple code.

Next will come HTML part, which is as below:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html>

<html xmlns="">
<head runat="server">
    <title>SignalR Simple Chat</title>
    <style type="text/css">
        .container {
            background-color: #99CCFF;
            border: thick solid #808080;
            padding: 20px;
            margin: 20px;
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />

    <!--Reference the jQuery library. -->
    <script src="Scripts/json2.js"></script>
    <script src="Scripts/jquery-1.10.2.js"></script>
    <script src="Scripts/jquery-1.10.2.min.js"></script>
    <!--Reference the SignalR library. -->
    <script src="Scripts/jquery.signalR-2.0.0.js"></script>
    <script src="Scripts/jquery.signalR-2.0.0.min.js"></script>
    <!--Reference the autogenerated SignalR hub script. -->
    <script src="/signalr/hubs"></script>
    <!--Add script to update the page and send messages.-->
    <script type="text/javascript">
$(function () {
    // Declare a proxy to reference the hub.
    var chat = $.connection.chatHub;

    //Write your server response related code here
    chat.client.serverresponse = function (message) {

    // Start the connection.
    $.connection.hub.start().done(function () {
        //Write your server invoke related code here
        $('#btnHello').click(function () {
            console.log('call server');

    <form id="form1" runat="server">
    Enter your message: <input type="text" id="txt" /><br />
    <input type="button" id="btnHello" value="Send message to server" />   

    <div id="dvServerResponse"></div>   
When you will run this in browser it will show as below:

Hope you have enjoyed this post and please visit my blog again.

Next will show something about Lamda Expression which I shall use in my chat application.

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