How to C# Socket programming
C# simplifies the network programming through its namespaces like System.Net and System.Net.Sockets . A Socket is an End-Point of To and From (Bidirectional) communication link between two programs (Server Program and Client Program ) running on the same network . We need two programs for communicating a socket application in C#. A Server Socket Program ( Server ) and a Client Socket Program ( Client ) .
C# socket example
C# Server Socket Program: A C# Server Socket Program running on a computer has a socket that bound to a Port Number on the same computer and listening to the client's incoming requests.
C# Client Socket Program: A C# Client Socket Program have to know the IP Address ( Hostname ) of the computer that the C# Server Socket Program resides and the Port Number assign for listening for client's request .
Once the connection is established between Server and Client , they can communicate (read or write ) through their own sockets.
There are two types of communication protocol uses for Socket Programming in C# , they are TCP/IP ( Transmission Control Protocol/Internet protocol ) Communication and UDP/IP ( User Datagram Protocol/Internet protocol ) Communication .
The above picture shows a Server and Client communication interfaces in C#.
The Server Socket Program is done through a C# Console based application . Here the Server is listening for the Client's request , and when the C# Server gets a request from Client socket , the Server sends a response to the Client . Click the following link to see in detail of a C# Server Socket Program.
The C# Client Socket Program is a windows based application . When the C# Client program execute , it will establish a connection to the C# Server program and send request to the Server , at the same time it also receive the response from C# Server . Click the following link to see in detail of C# Client Socket Program.
How to run this program ?
The C# Socket Program has two sections.
When you finish coding and build the Server and Client program , First you have to start C# Server Socket Program from DOS prompt , then you will get a message "Server Started" in your DOS screen, where the server program is running .
Next step is to start C# Client Socket Program in the same computer or other computers on the same network . When you start the client program , it will establish a connection to the Server and get a message in client screen " Client Started " , at the same time you can see a message in the Server screen "Accept connection from client" .
Now your C# Server Socket Program and C# Client Socket Program is get connected and communicated . If you want to communicate the Server and Client again , click the button in the client program , then you can see new messages in the Server and Client programs displayed.
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