C#

Socket Send and Receive BinData

Demonstrates the Chilkat Socket ReceiveBdN and SendBd methods. C#

bool success = false;

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

Chilkat.Socket sock = new Chilkat.Socket();

//  --------------------------------------------------------------------
//  This example uses the public TCP echo service at https://tcpbin.com/
//  --------------------------------------------------------------------

bool useTls = false;
int port = 4242;
int maxWaitMs = 5000;
success = sock.Connect("tcpbin.com",port,useTls,maxWaitMs);
if (success == false) {
    Debug.WriteLine(sock.LastErrorText);
    return;
}

//  Wait a max of 2 seconds for a response..
sock.MaxReadIdleMs = 2000;

//  Send 26 bytes contained in a Chilkat BinData
Chilkat.BinData bdToSend = new Chilkat.BinData();
int i = 0;
int byteVal = 65;
while (i < 26) {
    bdToSend.AppendByte(byteVal);
    byteVal = byteVal + 1;
    i = i + 1;
}

//  Send the contents of the BinData
//  Pass zero's in the 2nd and 3rd arguments to send the entire contents of the BinData.
sock.SendBd(bdToSend,0,0);

//  The tcpbin.com echo server only echoes after receiving an LF (linefeed char)
sock.SendByte(10);

//  The echo server will echo back whatever is sent to it.
//  We should be able to read the same bytes back..
Chilkat.BinData bdRecv = new Chilkat.BinData();
//  Receive the 26 bytes previously sent, plus the LF char.
success = sock.ReceiveBdN(27,bdRecv);
if (success == false) {
    Debug.WriteLine(sock.LastErrorText);
    return;
}

//  Show the contents of bdRecv in hex format
Debug.WriteLine(bdRecv.GetEncoded("hex"));

//  Output:  4142434445464748494A4B4C4D4E4F505152535455565758595A0A