Sample Client, TCP-Socket

Question

Hi,

I have to implement a client in an existing C++/MFC application and send XML telegrams.

Do you have a sample code.
If no response is received within 2 seconds, error message.

<ROOT>
  <ORDER_REQ state="?" />                                

</ROOT>

//-----

<ROOT>

 <ORDER_RES current="030121521993100000001000" />   

</ROOT>

Thanks in advance.

Best regards Markus.

Answer 1

Hi,

Thank you for posting here.

>>I have to implement a client in an existing C++/MFC application and send XML telegrams.

MFC supplies two models for writing network communications programs with Windows Sockets. They are CAsyncSocket and CSocket. For more details you could refer to the Doc：https://docs.microsoft.com/en-us/cpp/mfc/windows-sockets-in-mfc?view=vs-2019

To create a Client socket, first of all we need to declare a variable of type CAsyncSocket or our own class derived from CAsyncSocket or CSocket. Then we should call the create() function.

CAsyncSocket sock;
sock.Create(); // Use the default parameters

Because the socket is a client, we should use CAsyncSocket::Connect to connect the socket object to the server socket.

And then we could use CAsyncSocket::Send to send data on a connected socket.

I suggest you could refer to the link: https://docs.microsoft.com/en-us/cpp/mfc/windows-sockets-using-class-casyncsocket?view=vs-2019

Best Regards,

Jeanine Zhang

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Answer 2

Hi,

• there is a complete example that sends and receives XML messages. Read until the root element is complete?
  
  Once in sync.
  Asynchronous with timeout.

Thanks for tipps.

Greetings Markus.

Next time i take the new forum, although this one is better for publishing code snippets. This is not always possible in the new forum. 

Answer 3

Hi,

I suggest you may refer to the link: https://stackoverflow.com/questions/9473235/reading-an-xml-file-in-a-c-program

Best Regards,

Jeanine Zhang

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Answer 4

Hi,

Do you know an entire sample project?

With requests, answers and timeout, very much with automatic reconnection.

Thanks in advance.

Best Regards,

Markus 

Answer 5

Hi,

>>Do you know an entire sample project?
With requests, answers and timeout, very much with automatic reconnection.

As far as I'm concerned you could get plenty examples at codeproject.com, codeguru.com, and even more available through your favorite search engine. If you've got specific errors, you could post here, and we will provide you with better help.

Best Regards,

Jeanine Zhang

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We invite you to post new questions in the "Developing Universal Windows apps" forum’s new home on Microsoft Q&A !
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