How to make a simple chat program in c#

Text , Convert. ToInt32 textLocalPort. Text ; sck. Parse textFriendsIp. ToInt32 textFriendsPort. BeginReceiveFrom buffer, 0, buffer. Length, SocketFlags. Show ex. Just add the following code.

Show exp. GetBytes textMessage. Next Recommended Reading. The event ReceiveMsg will receive message from any client and the event NewNames will get newly added or deleted client. In the web config file, I set binding as netTcpBing. Please add your IP in the place of localhost in the baseAddress. The example project consists of three project files.

Please install the server on a machine. Compile the solution. Shutdown SocketShutdown. Both ; client. GetStream ; stream. Start client ; string s; while! Send ; thread. Join ; ns. Write Encoding.

The lock has to be maintained throughout the broadcast of messages, to ensure that no client is removed while enumerating the collection, and that no client is closed by one thread while another is trying to send on the socket.

In this version, there is no need for the Box object. The collection itself is referenced by a static field accessible by all the methods executing, and the int value assigned to each client is passed as the thread parameter, so the thread can look up the appropriate client object. Both server and client watch for and handle a read operation that completes with a byte count of 0.

This is the standard socket signal used to indicate that the remote endpoint is done sending. An endpoint indicates it's done sending by using the Shutdown method. To initiate the graceful closure, Shutdown is called with the "send" reason, indicating that the endpoint has stopped sending, but will still receive. The other endpoint, once done sending to the first endpoint, can then call Shutdown with the reason of "both" to indicate that it is done both sending and receiving.

Addendum: Some additional notes to address follow-up questions from the comments: The client calls Thread. Join on the receiving thread i. It allows the thread entry point to remain strongly-typed. Though, that code is not exactly how I would have ordinarily written it; I was sticking closely to your original code, while still using the opportunity to illustrate that idiom.

Applying these techniques to a Windows Forms project adds some complication, unsurprisingly. The solution that here is the same as usual: the most basic approach is to use Control. Invoke or Dispatcher. If you are using StreamReader to receive data, that object already has an awaitable ReadLineAsync and similar methods. If using the Socket directly, you can use the Task. In this approach, you would wait on the task representing the receiving code, instead of using Thread.

Security; using System. SessionState; using System. Routing; using Microsoft. In our application, we have created a class called "LetsChat. So whenever the application starts, then it maps to this class automatically.

C Class File — LetsChat. Web; using Microsoft. We have 1 method called "Send" which accepts one parameter. This method is then called on the Client side and using the "Clients. In Clients, we have some more methods and properties which are displayed as follows: Clients. All - This represents all the Clients, so whenever a message is sent, then that message is received by all the connected clients.

Caller - This will basically send a message or data only to the caller. It means whoever sends a message, only that person will receive it. It won't be received by any other connected clients. Others - Here other than the Caller, the message will be posted to all the connected clients. Group - This function is used to send messages or information to a certain group. In simple terms, this method allows you to create your own group and send information only to that group.

There are many other such functions which we can use to enrich our application. Wanna know, how to use them in proper terms??? Click here to learn more SignalR Finally in the above.

Web Form — "Chat. The third line takes the input from the textbox "txtMessage" and sends it to the Server. And finally, with the last line of the code, we are actually starting the connection with the Hub. You can see the entire code in the image below. I have also attached my project with this article so that you can download it and try it out. Final - Chat. The reason is that there is a persistent connection between the Server and the Client and the way the information is sent from IE is using " Forever Frames ".