473,785 Members | 2,842 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

UDPClient doesn't receive any data

What I'm trying to do seems pretty simple on the face of it -- create a
UDP listener on a particular port. My code is as follows:

int port = 9000;
IPEndPoint endPoint = new IPEndPoint(IPAd dress.Any, port);
UdpClient listener = new UdpClient(endPo int); // or new
UdpClient(port) ;

while (true){
byte[] bytes = listener.Receiv e(ref endPoint);
...
}

Unfortunately, my code never gets past the receive statement. I know
the data is coming into the machine, and a Java version of the same
code works just fine with the same server side resources.

What am I doing wrong here? I've looked at several past threads on the
same topic area and tried each and every suggestion, to no avail.

Help!

Thanks

Sandeep

Aug 30 '06 #1
2 2898
ss*******@yahoo .com wrote:
What I'm trying to do seems pretty simple on the face of it -- create a
UDP listener on a particular port. My code is as follows:

int port = 9000;
IPEndPoint endPoint = new IPEndPoint(IPAd dress.Any, port);
UdpClient listener = new UdpClient(endPo int); // or new
UdpClient(port) ;

while (true){
byte[] bytes = listener.Receiv e(ref endPoint);
...
}
Try:

int port = 9000;
UdpClient listener = new UdpClient(port) ;
IPEndPoint endPoint = new IPEndPoint(IPAd dress.Any, 0);
while (true){
byte[] bytes = listener.Receiv e(ref endPoint);
...
}

Arne

Aug 30 '06 #2
Thanks for the suggestion, this seems to work!

Sandeep

Arne Vajhøj wrote:
ss*******@yahoo .com wrote:
What I'm trying to do seems pretty simple on the face of it -- create a
UDP listener on a particular port. My code is as follows:

int port = 9000;
IPEndPoint endPoint = new IPEndPoint(IPAd dress.Any, port);
UdpClient listener = new UdpClient(endPo int); // or new
UdpClient(port) ;

while (true){
byte[] bytes = listener.Receiv e(ref endPoint);
...
}

Try:

int port = 9000;
UdpClient listener = new UdpClient(port) ;
IPEndPoint endPoint = new IPEndPoint(IPAd dress.Any, 0);
while (true){
byte[] bytes = listener.Receiv e(ref endPoint);
...
}

Arne
Aug 30 '06 #3

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

Similar topics

4
16050
by: Morten Overgaard | last post by:
Hi I'm listening on the SysLog port (514) through UDP. The problem is that I am not receiving anything nut I know that i get messages on the port. When I use KIWI to listen on the same port via UDP tons of messages arrive.. What am I'm doing wrong My code looks like the following... private UdpClient udpClient;
4
5156
by: Emilio | last post by:
In the help pages for the UdpClient there is some sample code which sends a udp message and prints what it received. Can someone help me to finish the code present there? I think basically the missing part is the server. Tia.
1
3973
by: Dan Kelley | last post by:
I have 2 projects - 1 Winform project that sends Udp messages using the UdpClient class when a button is clicked, and a Console application that listens for these Udp messages. If I try to use the UdpClient class to receive, it never works. The messages are never received (no exceptions). If I use a normal socket configured to listen for Udp messages, it works perfectly. Below is my sample code. It is only test code - I know the...
2
11900
by: Rick | last post by:
Hi, I'm trying to get a simple UdpClient app working. I've been looking at the MSDN info regarding UdpClient. When I set it up on my own PC and send messages to myself it works OK. If I try to send messages to another PC with another IP address I get multiple exception, the first one being "The requested address is not valid in its context". I get this when I create my UdpClient(iplistener) where iplistener is an IPEndPoint. It doesn't...
2
2650
by: Emilio | last post by:
Question about UdpClient sample ' This constructor arbitrarily assigns the local port number. Dim udpClient As New UdpClient() Try udpClient.Connect("www.contoso.com", 11000) ' Sends a message to the host to which you have connected. Dim sendBytes As () = Encoding.ASCII.GetBytes("Is anybody there?")
1
2182
by: Plem | last post by:
Hi All, I've allready posted this on the C# group (oops). I'm trying to get a UDPclient to receive. I use the sample code provided in HELP but to nbo avail. When the receive method is executed, it throws an exception, claiming an invalid argument was used. The WinAPI description on MSDN says: Invalid argument.
3
13693
by: D. André Dhondt | last post by:
In VB.NET 2003, is there a way to create a System.Net.Sockets.UDPClient to listen to any address AND any port? I can get it to listen to any address, but only if I specify a port (for example, port 12345): '----------- Dim udpClient as New Sockets.UdpClient(12345) Dim ipEndPoint as New IPEndPoint(IPAddress.Any, 0) Dim receiveBytes as Byte()
7
3576
by: | last post by:
I have the following program using System; using System.Collections; using System.Net.Sockets; using System.Net; using System.IO; public class Test { public static void Main(string s) {
0
1654
by: Johan | last post by:
Suppose: There are two devices on my network that both broadcast UDP datagrams (and they both use the same portnumber 1234). I want to create two executables that use UdpClient internally. Each executable should only receive the datagrams from one device. Is this possible? Lets say the devices are 10.0.0.1 and 10.0.0.2. I have already tried something like this: UdpClient udpClient = new UdpClient(1234);
0
9480
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 synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10330
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. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10153
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
0
9952
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 choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
8976
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 launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
6740
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 into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5511
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4053
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
2
3654
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.