473,585 Members | 2,772 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Problem sending Hexadecimal as part of a string using socket.send

Hi, I'm able to make connection to a server using socket connection.
However, when I send a command string the server just ignores it. All
command string needs to start with "0xF9" at Byte 0. During the run-time
debug, I see it to be "u" with a "~" on top of it. Is that OxF9? Can
someone tell me what I'm doing wrong?
Thanks, Alpha

private void Connect(String server, String message)
{
//Socket Connect
try
{
//create a new client socket ...
m_socClient = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
String szIPSelected = "192.168.1. 7";
String szPort = "22333";
int alPort = System.Convert. ToInt16 (szPort,10);

System.Net.IPAd dress remoteIPAddress =
System.Net.IPAd dress.Parse(szI PSelected);
System.Net.IPEn dPoint remoteEndPoint = new
System.Net.IPEn dPoint(remoteIP Address, alPort);
m_socClient.Con nect(remoteEndP oint);
// String message = "Hello There";
// byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
// m_socClient.Sen d(byData);

}
catch (SocketExceptio n se)
{
MessageBox.Show ( se.Message );
}
//Send ATS Data
try
{
byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
m_socClient.Sen d (byData);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Receive ATS Data
// Receive the TcpServer.respo nse.

try
{
byte [] buffer = new byte[256];
int iRx = m_socClient.Rec eive (buffer);
char[] chars = new char[iRx];

System.Text.Dec oder d = System.Text.Enc oding.UTF8.GetD ecoder();
int charLen = d.GetChars(buff er, 0, iRx, chars, 0);
System.String Retmessage = new System.String(c hars);
MessageBox.Show ("Reply from ATS server: "+ Retmessage.ToSt ring() ,
"ATS Reply", MessageBoxButto ns.OK, MessageBoxIcon. Information);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Close Socket Connection
m_socClient.Clo se ();

}

private void menuItem9_Click (object sender, System.EventArg s e)
{
string Message;
Message = "\xF9" + "1800000007CATT ,TO";
Connect("Map", Message);
}
Dec 23 '05 #1
2 5283
Alpha,

0xF9 is definitely not in the ASCII character set, so it's very possible
that the character you see is correct. However, this doesn't mean that what
you are sending is wrong. It just is that the "u" character is the
representation of that byte. However, how the service interprets it is
completely irrelevant.

If you actually want to send the byte F9, then do not send it as a
string. Rather, create the byte array with this value yourself, and send
that.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Alpha" <Al***@discussi ons.microsoft.c om> wrote in message
news:9E******** *************** ***********@mic rosoft.com...
Hi, I'm able to make connection to a server using socket connection.
However, when I send a command string the server just ignores it. All
command string needs to start with "0xF9" at Byte 0. During the run-time
debug, I see it to be "u" with a "~" on top of it. Is that OxF9? Can
someone tell me what I'm doing wrong?
Thanks, Alpha

private void Connect(String server, String message)
{
//Socket Connect
try
{
//create a new client socket ...
m_socClient = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
String szIPSelected = "192.168.1. 7";
String szPort = "22333";
int alPort = System.Convert. ToInt16 (szPort,10);

System.Net.IPAd dress remoteIPAddress =
System.Net.IPAd dress.Parse(szI PSelected);
System.Net.IPEn dPoint remoteEndPoint = new
System.Net.IPEn dPoint(remoteIP Address, alPort);
m_socClient.Con nect(remoteEndP oint);
// String message = "Hello There";
// byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
// m_socClient.Sen d(byData);

}
catch (SocketExceptio n se)
{
MessageBox.Show ( se.Message );
}
//Send ATS Data
try
{
byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
m_socClient.Sen d (byData);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Receive ATS Data
// Receive the TcpServer.respo nse.

try
{
byte [] buffer = new byte[256];
int iRx = m_socClient.Rec eive (buffer);
char[] chars = new char[iRx];

System.Text.Dec oder d = System.Text.Enc oding.UTF8.GetD ecoder();
int charLen = d.GetChars(buff er, 0, iRx, chars, 0);
System.String Retmessage = new System.String(c hars);
MessageBox.Show ("Reply from ATS server: "+ Retmessage.ToSt ring() ,
"ATS Reply", MessageBoxButto ns.OK, MessageBoxIcon. Information);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Close Socket Connection
m_socClient.Clo se ();

}

private void menuItem9_Click (object sender, System.EventArg s e)
{
string Message;
Message = "\xF9" + "1800000007CATT ,TO";
Connect("Map", Message);
}

Dec 24 '05 #2
Thank you Nicholas for the help. Can you show me how to send F9 and the rest
of my message in the bye array?

Thanks, Alpha

"Nicholas Paldino [.NET/C# MVP]" wrote:
Alpha,

0xF9 is definitely not in the ASCII character set, so it's very possible
that the character you see is correct. However, this doesn't mean that what
you are sending is wrong. It just is that the "u" character is the
representation of that byte. However, how the service interprets it is
completely irrelevant.

If you actually want to send the byte F9, then do not send it as a
string. Rather, create the byte array with this value yourself, and send
that.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Alpha" <Al***@discussi ons.microsoft.c om> wrote in message
news:9E******** *************** ***********@mic rosoft.com...
Hi, I'm able to make connection to a server using socket connection.
However, when I send a command string the server just ignores it. All
command string needs to start with "0xF9" at Byte 0. During the run-time
debug, I see it to be "u" with a "~" on top of it. Is that OxF9? Can
someone tell me what I'm doing wrong?
Thanks, Alpha

private void Connect(String server, String message)
{
//Socket Connect
try
{
//create a new client socket ...
m_socClient = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am,
ProtocolType.Tc p);
String szIPSelected = "192.168.1. 7";
String szPort = "22333";
int alPort = System.Convert. ToInt16 (szPort,10);

System.Net.IPAd dress remoteIPAddress =
System.Net.IPAd dress.Parse(szI PSelected);
System.Net.IPEn dPoint remoteEndPoint = new
System.Net.IPEn dPoint(remoteIP Address, alPort);
m_socClient.Con nect(remoteEndP oint);
// String message = "Hello There";
// byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
// m_socClient.Sen d(byData);

}
catch (SocketExceptio n se)
{
MessageBox.Show ( se.Message );
}
//Send ATS Data
try
{
byte[] byData = System.Text.Enc oding.ASCII.Get Bytes(message);
m_socClient.Sen d (byData);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Receive ATS Data
// Receive the TcpServer.respo nse.

try
{
byte [] buffer = new byte[256];
int iRx = m_socClient.Rec eive (buffer);
char[] chars = new char[iRx];

System.Text.Dec oder d = System.Text.Enc oding.UTF8.GetD ecoder();
int charLen = d.GetChars(buff er, 0, iRx, chars, 0);
System.String Retmessage = new System.String(c hars);
MessageBox.Show ("Reply from ATS server: "+ Retmessage.ToSt ring() ,
"ATS Reply", MessageBoxButto ns.OK, MessageBoxIcon. Information);
}
catch(SocketExc eption se)
{
MessageBox.Show (se.Message );
}
//Close Socket Connection
m_socClient.Clo se ();

}

private void menuItem9_Click (object sender, System.EventArg s e)
{
string Message;
Message = "\xF9" + "1800000007CATT ,TO";
Connect("Map", Message);
}


Dec 27 '05 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

11
2895
by: Jeff Crouse | last post by:
In my project, I have successfully opened a sock_stream style socket connection between two processes and am trying to send 'buffer' to a connected client, 'fd'. The following code works just fine. void Macsock::writeData(char *buffer, int fd) { char message = "This is a message from the front."; if(write(fd, message, sizeof(message)) <...
0
1445
by: Lynne | last post by:
I am using the C# asynchronous socket functionality for a server, and it appears to work fine if I just receive data and echo it back to the client. The problem occurs when I try to handle sending data independent of a receive. The send happens just fine, but when I receive the next set of data from the client (in a size, size, data set of...
11
6612
by: Abhishek | last post by:
I have a problem transfering files using sockets from pocket pc(.net compact c#) to desktop(not using .net just mfc and sockets 2 API). The socket communication is not a issue and I am able to transfer data across.On the serve I am using Socket 2 API (recv function to read bytes)and not using ..NET. I use FileStream to open the file on the...
2
702
by: Droopy | last post by:
Hi, I try to implement a reusable socket class to send and receive data. It seems to work but I have 2 problems : 1) I rely on Socket.Available to detect that the connection is closed (no more data to expect). Sometimes, Socket.Available returns 0 but the other end of the connection did not close it ! 2) This class will be used by many...
4
8194
by: yaron | last post by:
Hi, I have a problem when sending data over TCP socket from c# client to java server. the connection established ok, but i can't send data from c# client to java server. it's work ok with TcpClient, NetworkStream and StreamWriter classes. but with low level socket it doesn't work (When using the Socket class Send method).
11
2232
by: zaebos | last post by:
hi, i have this code which is part of a main program, to email from within the program a log file: int MailIt (char *mailserver, char *emailto, char *emailfrom, char *emailsubject, char *emailmessage) { SOCKET sockfd; WSADATA wsaData; FILE *smtpfile; #define bufsize 300
3
4280
by: BuddyWork | last post by:
Hello, Could someone please explain why the Socket.Send is slow to send to the same process it sending from. Eg. Process1 calls Socket.Send which sends to the same IP address and port, the receiver is running within Process1. If I move the receiver into Process2 then its fast. Please can someone explain.
0
3153
by: Buddy Home | last post by:
There is two examples of code. Example 1. Send and Receive within the same process. Put this code in a console app called SendAndReceive and run the code. using System; using System.Collections.Generic; using System.Net; using System.Net.Sockets; using System.Runtime.Serialization.Formatters.Binary;
2
6079
by: Danny | last post by:
Hi all, Trying to send mail with System.Net.SmtpClient, using very simple code just for testing: SmtpClient smtp = new SmtpClient("mail.server.com", 25); smtp.Credentials = new System.Net.NetworkCredential("user", "password"); try {
0
7832
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
0
8192
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
0
8204
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
0
6592
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
0
5382
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert...
0
3828
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in...
0
3853
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
2338
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
1
1442
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.