Sending Image Sockets?
Jun 11, 2011i want to send an multiple screenshot image.. and i want them to send one by one from my client to server. im using vs2008.
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C# - Sending A String With Sockets?
Aug 20, 2009I am using Nektra's Deviare to hook winsock's send method calls. My ideia is to learn to also send messages through the same socket than the original application. So what I'm doing is when i detect the first call to send message, I save the socket id(the first argument of the send function), so I can use it later.
So here is my code:
uint socket = 0;
[DllImport("Ws2_32.dll")]
private static extern int send(uint socket, string buf, int len, int flags);
[Code].....
This last messagebox is poping up always -1. Why should be it?
edit: calling WSAGetLastError() returns 2. Which I do not know what it means, as it doesn't seem to appear on msdn.
C++ Sending Structs Over Sockets
Aug 25, 2009i am using vb.net and i would to send some structs to a C++ tcp server.The problem is the structs i am sending might contain other structs.[code]Lets say i want to send FirstStruct over to the C++ Server.
View 2 RepliesSending A File Over Sockets?
Apr 14, 2010I know there are lots of examples here on the forum, but all to difficult to understand.I have a client:
I have a client:
Imports System.Net.Sockets
Imports System.Text
[code].....
VS 2008 Sending Info Through Sockets / Ports
Jun 2, 2009VS 2008: Send commands to a local UDP port. The port is 5975. Let me know if im being to vague or you need more info.
View 3 RepliesSend / Receive Image Via Sockets
Feb 21, 2011I 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:
[Code]...
Sending Email With Embed Image (Gmail)?
Jun 27, 2012I am trying to send an email with image in VB.NET, but it keeps giving this error:Command not implemented. The server response was: 5.5.1 Unrecognized command. v16sm160510122eem.17or if we check the error in visual studio itselfCommand not implemented. The server response was: 5.5.1 Unrecognized command. p41sm162075833eef.5I am using this code:
Imports System.Net.Mail
Public Class mail
Public Sub sendMail(sender As String, password As String, receiver As String, content As
[code]......
C# - Show Preview Of Image Being Uploaded Before Actually Sending It To Server
Jan 11, 2012I have a FileUpload control in my aspx page and I want to display the image selected before postback so that user confirms the image to upload.
View 5 RepliesSending ByteArray Image To Server Side And Save It To Local System?
Aug 19, 2009I want to send a image to server side using HTTPService,I am using ASP.NET for server side coding. I don't know how to write server side code to receive the image sent as a byteArray, and I am also not sure if my client side code is correct or not。is there any IT PRO..[code]I could not get the image in my disk,I think the flex side should have not problem, but the VB code side should be something wrong.
View 9 RepliesSending Email - Operation Timed Out / Not Sending Error
May 27, 2012I am trying to Send an Email with an attachment (using Gmail) but I keep getting errors like "Operation Timed out" or Failure Sending Email". It was working earlier today but I found out that i needed to add Using statement because the email was having a file open that had to be deleted after it was sent but afterwards it doesn't work.
Here's what I have (Portion of it):
Private Sub SendMailOneAttachment(ByVal un As String, ByVal pass As String, Optional ByVal smtp As String = "smtp.gmail.com")
Using oAttach As Net.Mail.Attachment = New Net.Mail.Attachment((Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "\" & My.Computer.Name & "_" & fName & " .zip"))
Dim client As SmtpClient = New SmtpClient(smtp)
[Code] .....
The ports are correct I believe, no firewall up on my PC...
Sending Files/Sending Images/Msg For P2P Chat?
Mar 4, 2010Which is better for Sending Files/Sending Images/Msg for P2P Chat?
View 1 RepliesSending E-mail - Getting Error Message "5 Failure sending Mail At System?
Jul 13, 2010I am tring to send e-mail used VB 2008. Below is my code. The error message I am getting is "5 Failure sending mail at System.Net.mail.client.send(MailMessage message).I have two questions. 1.) What am I doing wrong? & 2.) Is there a way the get a more description error message.
message As
New System.Net.Mail.MailMessage
Dim mySmtpsvr[code].....
Reading XML Over Sockets
Feb 17, 2010I am writing an application which involves reading xml over socket. The messages arrive at socket asynchronously. How can I ensure that data is received in form of complete xml elements, validate received data and which classes will be helpful for me in accomplishing my goal.
View 1 RepliesUsing PTP Or NTP Protocol With Sockets?
May 21, 2012Can i implement PTP (precision time protocol) or NTP (simple network timing) with sockets?
If so, how can i use them to send small packages (4 to 33 bytes) with the smallest delay possible?
P.S. I would prefer to know more about PTP, I've heard that it has smaller delay.
.net - Working Of Tcpclient Sockets In .net?
Jun 2, 2011I have an application in vb.net which will connect with an hardware device and test its functionality. The hardware device basically spits out data continuosly through Ethernet. That is it recieves some data via com ports and spits out the processed data via ethernet.So my application does both. Thats pretty much the entire app.My problem is i am using tcpclient sockets. Now when i connect a tcpclient to the device using
tcpclient.open(ip,port);
Immediately the device sends some data which comes and get stored in the clientsocket. Then i send a command to it ,only then i read the data from the clientsocket using
tcpclient.getstream().read()
at this time the entire data that is the one which flowed immediately when connected to the device and the one that i actually need after passing command is both acquired. This is undesirable. I need the data which i read only after sending the command. So i was wondering if there is any way to clear the tcpclient socket before we do a read. The manual doesnt show any such method.
Binding & Connecting Using Sockets?
Sep 29, 2009Here is an issue with a socket I am having:
Public Sub Connect(ByVal server As String, ByVal port As Integer)
Dim IP As IPAddress = IPAddress.Parse(server)
Dim EP As IPEndPoint = New IPEndPoint(IP, port)
[Code]....
The socket is declared like this, at the top of the code:
Dim sock As Socket
What is wrong here? It says Object reference not set to an instance of an object, which is a NullReferenceException.
Create Sockets And Communicate Over Them?
Mar 4, 2009I am actually new to VB.net...i have managed to create Sockets and communicate over them..but i dont know how fire sql queries through sockets as they take in Byte data as a input...i want to actually pass queries through sockets and retrive those results...i am using mysql database....i have actually tried changing the connection string (the ip address) for a static network but i think sockets are better for dynamic ip networks.
View 1 RepliesNet.Sockets Wait For Streamwrite?
Nov 25, 2011Net.Sockets wait for streamwrite?
View 2 RepliesSend Email Using NET Sockets?
Feb 18, 2003This code will allow you to send Emails using only .NET Sockets. This code was adapted from sample code on[code]...
View 7 RepliesSend Email VIA Sockets In VB?
Jun 16, 2009So basically I would like to know what goes on behind smtpclient, webrequest and all those.
I would like to know if its possible to connect to an smtp server with sockets. Also, can anyone recommend a good OOAD(object oriented analysis and design) tutorial or book?
Sockets And Timeout Errors?
Jan 3, 2011I'm building a program that has a very basic premise.
For X amount of Objects
Open Conection
Perform Actions
[code].....
System.net.sockets Codes?
Mar 11, 2011Do you all have any updated websites that provides tutorials about the system.net.sockets namespace?
View 1 RepliesSystem.Net.Sockets.Socket?
Feb 23, 2011I have a chat program using System.Net.Sockets.Socket that works perfectly over LAN.My question is - will this same program work over the net with little or no modification and if so do i provide the client with the IP of my machine or of my router and use port forwardin
View 1 RepliesVS 2005 System.Net.Sockets - FTP?
Nov 9, 2009I'm using System.Net.Sockets namespace for connecting to an ftp server. If a user has to login to a firewall first though, I'm not too sure what to do. The following is what I have working for logging into an ftp server without a firewall. (The Else statement) Do you know what I might add to the if statement? In the method where this conditional is, I am passing a firewall username and password.
m_tcpClient = New TcpClient
' Try to connect to ftp site
' If using firewall, login to it first then issue another command to log in to actual
[code]....
.NET Asynchronous Sockets Packets Getting Lost?
Oct 15, 2011I made a TCP server which communicates with multiple clients at once, but I can't seem to be able to make them stable. When one of the client sends 100 packets to the server, the server receives only a few of them.Here's the client code in PasteBin. It shows how the client connects to the server and then sends 100 messages in a For loop to the server.And here's how the server handles the connection. I couldn't paste the full source as it's hundreds of lines long so let me know if it's missing any mandatory parts and I'll upload them as well.
View 1 RepliesAsync Sockets Client-server?
Jul 25, 2011I'm using vb .net 2008 with 3.5 framework. (the following 2 classes are put in a DLL that i import in a main application)
Server class:
Code:
Imports System.Xml
Imports System.Net.Sockets
Imports System.Text
Imports System.Net
[code]....
Basically in my main application i am instantiating the client class from this dll, as well as the server one. On the client form i got a "send data" (SendFISA sub) and a "connect" button. After connecting the client and clicking on the "send data" i am sending to the server a string formed of some information created when instantiating the client class from the dll (i can't make that type of data public, but i'm just using a constructor to assign values to a class object, nothing special).
Now, when the server receives the data sent by "send data" button click it responds with "PKG_SENT" corresponding to the "FISASENT" string terminator(in the module) of the string that was sent. The "WRONG_MSG" constant is for when the string terminator is different from the 2 from above.
On the local disk, if the server cannot be reached, the client saves an xml file with this data. In the dll i made a timer that ticks every 5 seconds and checks to see if there is any xml file on the disk and sends it to the server if the connection is ok (trimiteXML sub). The server would respond with "XML_SENT" corresponding to the string terminator "XMLSENT"(in the module) appended to the read string from the xml file. After the file is sent it is deleted from the local dir.
The problem occurs when i click "send data" AND there are XML files to be sent from the disk. I believe they are interpreted by the server somehow at the same time because the message is neither "PKG_SENT" nor "XML_SENT", but it becomes a combination of the "WRONG_MSG_TYPE" and "XML_SENT", "XML_SENTG_TYPE". I have no idea why this is happening and i basically want the socket to wait with sending the files from the disks until the "send data" finishes.
Been All Over Net And Back Trying To Find Tutorial For .NET Sockets
Sep 17, 2011I'm constantly trying to improve my coding abilities. I'm trying to learn the ropes on using .NET Sockets but everything I'm finding it pretty cheesy and doesn't really go over the details of what each piece of the code is about.Can anyone point me to a great tutorial or site where I can get started?
View 2 RepliesC# - Client Side Sockets Library
Nov 30, 2009Be able to instantiate the object and hook up the MessageReceived and ConnectionChanged events (or ones with similar purposes). Be able to send data (duh) When data is received, it fires the MessageReceived event on the same thread that the object was created on (this would be nice, but not absolutely required). Have a blocking and non-blocking options for connecting and possibly sending data.
View 2 RepliesCannot Receive More Than 1 Response With Async Sockets
Jun 16, 2009I'm trying to setup an asynchronous client and I can send/receive one command and response, but when I try to send the second command, the command is sent (I verified by code inspection), but I am getting no response.
Heres the code, a majority of it is from the Microsoft example.
Option Explicit On
Imports System
Imports System.Net
[Code].....
Check If A Port Is Open Using Sockets?
Feb 16, 2010I have written some code to check if a port is open. I'm currently trying to work with the system.net.sockets name space.I know that the easy way out would be to use AxWinsock, but I don't think the AxWinSock is very cool, nor do I think it's very professional when trying to make network applications in VB.NET.
I've got this Error message : Socket Exception Was unhandled, No connection could be made because the target machine actively refused it 127.0.0.1:1 IDK, Like I said, I'm new to the System.net.sockets namespace, I'm pretty good with other stuff in VB.NET, but when it comes to the serious stuff like the system.net.sockets namespace, I'm not so great.look at this code and tell me what I am doing wrong, I've manged to get this far, and I don't want to just give up and continue watching my movie.
[Code]....