I have created Campaign in Mailchimp account and now I want to
send Email to Campaign members Programatically in C#. Actually i am
new to this concept and want to send newsletter to users who have
subscribed to campaign. Please guide me for implement this.
What are basic steps for create and send newsletter on Mailchimp
account and way to access it from C# with required methods.
I found that signalr technology is good in term of server-client communication.
but issue i got in this is authentication ...
other technology which is socket programming. but it has some limitation and require ssl certificate if it run on public IP.
i want like client can login on web portal and send-receive data from windows application which is installed on windows with same credentials. means user can do action from web portal from anywhere if windows exe is installed and logged in.
Also keep in mind that when he said "the client PC needs to send the data" that means that software to do just that must be running on the client machine.
The client, not the server.
Your question then is pointless unless you can install your software on the server. The client might provide some way to retrieve that information by itself. However for you to use that you must
1. Find that software
2. Insure it is running
3. Insure that it can be accessed from your server
4. Figure out the protocol of 1 and then use it
Not that 4, which is basically your original question, is pointless until 1 to 3 have been resolved.