VS 2008 UDP .NET Receive - Send Part Of The Project
Jun 5, 2011
I have found a simple UDP project at [URL] which is a project written in VB2003. I have imported it into VB2008 Express edition. I have no problems with the send part of the project. I'm able to send messages to internal (eg. 127.000.000.001) and external (in my case the other device has 192.168.0.100) addresses. Now for the receive part... I'm able to receive messagess sent form the same computer (127.000.000.001) but none of the packets are being received by the aplication if sent from an external source.
I realize this is a broad question, but how do I recieve / send packets. I know what packets I need to send and what Im going to recieve, but I dont know how to send / recieve them.
OK I was a little hasty in marking my earlier thread resolved... I'm sending a file from my server using the following code :
[Code]...
The received file (in my test case it is a PNG file) comes through corrupted - I'm 99.99% sure its a case of encoding but I've tried various options and in each case when I open the original file and the received file in notepad the files are visibly of the same origin but some characters are wrong in the received file. I'm sure its a simple answer but I can't find it - what am I doing wrong in terms of re-assembling the received file?
Recently I created a Windows Form database project in VS 2010 and it worked great.I am now trying to port this project into VS 2008 (Using VB.NET in both btw).When I run it in VS 2008 I receive the following error message:[code]
I have posted about receiving email before and this is a follow up of my progress. I have only one form and it consists of 2 buttons, one for downloading messages from the server, the other, to disconnect the connection. I also have one listview and one textbox to display the message. I took the codes from a few open source programming website and compiled them. My program works as such that upon clicking the 'Download Messages' button, a message box will pop up and the user/admin will be asked to enter the POP3 account name. My doubts are I am not sure what POP3 account name to put in.
is it possible to make one application send a task to another application and recieve the result from that secondary app?i made a text editor program and i added a scan feature and i made another app that has ocr capabilities.The scanner ability is in my text editor program, the ocr program doesnt scan you have to input an image into it and it will give text result a few seconds later.the prob is alot of times the ocr code uses sooo much memory and crashes when its incorporated with my text editor, but individually each application works fine and doesnt take too much memory. Memory wont be even an issue if the ocr program is standalone so that when it is done decoding image the application can be made to exit. now here is the question, how do i make my text editor send the image to the ocr program and how do i make my ocr program send the text back to my text editor? is it possible? i mean the only way i know off is creating temp files in a certain folder and having a timer on each program that keeps waiting for temp files. That just seems like pretty lame coding to me i was wondering if there's a better way?
Since a few months I want to learn how to receive and send packets. Since WinSock doesn't work I think it'll be quite hard to get an easy way to do it.
I want to be able to send and get packets as a client. (TCP) I know that I need System.Net.Sockets, and that's quite everything...
I was going over the Screen Saver Tutorial for VB Express 2005 and i Noticed How the Screen Saver app excepts params at startup... and depending on the startup param it will display the screen saver or the options form... lets say that i want to start up a screen saver from my program, how would i send it to the screen saver to display the options form the param is "/p" or something.
I have a program that is meant to send and receive pictures. There are two parts, client and server, the server sending pictures, and client receiving.the server needs to send it across the internet, then the client needs to receive and show the image in a picture box.
I need to send and receive a large image between programs running on different machines within the same network.
I've looked at using upd however ran into problems with the size of the packets and (after breaking the image into smaller pieces to get past this problem) the number of packets needing to be processed all at once - and ultimately packet loss.
I've also thought of sending the image by storing it in a common file folder and receiving it by using file watcher as a trigger. However, this just adds further complexities in setup where common folders don't already exist.
Assuming I'm barking up the right tree looking at tcp, can someone point me to/provide an example of how to send an image file using it (vb.net would be ideal). Also, are there practical limits to tcp package sizes?
I have these following lines to send bytes using socket
Dim server As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp) Dim myIp As IPAddress = IPAddress.Parse("myIP") Dim ip As New IPEndPoint(myIp, Int32.Parse("myPort"))
[Code]....
As in the code, I am supposed to retrieved "Halo". Instead I keep receiving sth like "[]".
I have created an application which listens for strings being sent to my pc from a remote unit. I now need to add the function of sending strings back to the remote unit on a button press. I've searched for ages to find a solution but I'm not knowledgeable enough yet with vb.net to solve this solution.
I'm getting the error with the line opensock2 = New IO.StreamWriter(client.GetStream) saying its not connected. So I seem to need to pass the connection from the background worker to the button click, or have it somewhere else in the code to make it accessible. [Code]
as above how to do that man? I will also want to extract the information to be sent from the database. An example of what i am going to do is something like this:
I want to send image from server to client via .net Sockets and assign it to a picturebox. but I got problem in receiving data, it's 'Server' side code:
Now i need to do a few hundred/thousand requests all at the same time or atleast over a short period. I am assuning i need to do this asynchronously. I have looked all over the net and tested various ways to communicate asynchronously and am pretty stumped. None of the examples out there seem to explain how i receive the xml return as a string ("which i will write to file or db")
Does anyone have any working code to do such a process?
I'm completely new to sockets etc.I'm trying to create an app that'll allow someone to send short information messages to several other people with the same app, using the internet and sockets(?)I've tried using code from online, but I'm getting no where.
How Can send And receive File with SerialPort in vb.net 2005 i use this sample code for sending string , and now i will know how can send any File by serialport click here there are no sample code in microsoft site i Use "Virtual Serial Ports Driver XP " to Test my sample how can use the Zmodem , Ymodem ,Xmodem , etc in vb.net by serialport ?
I want to write a Solution with VB.Net for Receive "Users" requests and Send specified information to
them with SMS.I use D-Link GSM-Modem (Model:DWM-156).
This model/type of GSM-Modem, has embeded Driver and a Application for Sending/Receiving SMS.on it, and also we can attach MicroSD to the Device. 1-Send/Receive with GSM-Modem and D-Link's application :
when i attach GSM-Modem to USB port, D-Link' app , run automatically , then I heared noises on my Speaker, like when turn on a Mobile. I think this Signals "Hand Shake" with My GSM-Network.
I coded a small tcp server/client software implementing the async methods of the socket object. In order to keep track and control of the transfered data on both sides, I decided to wrap the bytes to be transfered into small 65 000 bytes packets, sent one after each other, in varying order.In most cases, it works perfectly, and it is impressively fast. However, when I want to transfer larger data than my usual requests, say like a dozen megabytes, crippling problems start to appear, out of shit.Effectively, it seems that somehow when executed without pauses, the server sends the packets too fast, or that the client receives it too slowly. However, if I put the SendAsync method's thread to sleep for like 100ms before sendingthe next packet, everything arrives without problem on the client.[code]
i am trying to ping some terminals and all i could find for code is this
If My.Computer.Network.Ping(IPaddress, 1000) Then MsgBox(IPaddress & " pinged successfully.") Else MsgBox(IPaddress & " request timed out.") End If
it keeps comming up request timed out message. and i got this from microsoft. instead of a message box i am going to return the response to a listview control but i have to get a successful message first.
I'm trying to send a message to a specific IP/Port and receive a reply in an ASP.net website, i tried the method describd at the following link but it didn't work for me as you can see SocketException An attempt was made to access a socket in a way forbidden by its access permissions
