No Connection Could Be Made Because The Target Machine Actively Refused It
Mar 24, 2010
I made 2 simple VB .Net applications.One is listening on a port and echoing received message to sender (server side), and the other sends messages to it (client side).When I run them both on my machine, everything goes fine.
The problem arised when I tried running each of them on different machines. The client throws an error : "No connection could be made because the target machine actively refused it"
[Code]...
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Aug 16, 2010
I'm in the process of upgrading my web pages from asp classic to asp.net.My previous code used CDO to send emails.[code]This code works fine but I'd like to send emails from my asp.net pages. When I send from the .net pages, I get the error message: "No connection could be made because the target machine actively refused it xx.xx.xxx.xxx:2 " [code]I'm rather new to .Net but I've searched for hours and can not come up with a reason why the old code works but the new doesn't.
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Mar 2, 2010
chat application i getting error: No connection could be made because the target machine actively refused it.?? my english wasn very good..Is there another way to connect from first app. to second app. ? Maybe using webservice like
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Mar 25, 2009
I want to refactor my existing application to work with as a client/server app, and was looking at introductions to Remoting.I got a simple system up and running 2 days ago, and haven't touched it since until just now, but now I'm getting an error message when trying to instantiate a class from the remoted DLL : "No connection could be made because the target machine actively refused it".The server and client are both actually running on the same machine for simplicity at the moment. I have three "applications" involved - a class library containing the server functionality, a listener application sitting with the server, and then a client applicaition.Most of the articles I can find online referring to this error seem to apply primarily to asp.net but I'm just using traditional vb.net (2008)I initially suspected the cause may be firewall related (as when I first got it running I was prompted to allow access) but I've turned off my McAfee firewall and also my Windows firewall with no joy, and besides - the error message seems to imply that communication with the server has been established but that it doesn't want to play ball.
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Dec 8, 2010
94.69.250.128:8888 ( My external IP:Port that I've configures the task ) I'm kinda stuck in it, whilst my Chat application is ready, it seems it can't connect to the Internet now. The error is happening on the line :
[Code]...
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Jul 14, 2009
[ERROR]
System.Net.Sockets.SocketException:No connection could be made because the target machine actively refused it 192.168.0.59:500 at system.Net.Sockets.TCPClient.Connect(String hostname, Int32 port) at WinClient.Form1.btnSignIn_Click(Object sender, EventArgs e)
[/ERROR]
Though I dont believe the issue is with the code here it is:[code]......
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Nov 24, 2011
I get this error "No connection could be made because the target machine actively refused it 69.69.247.18:80." when executing this code. It is caught on the line indicated with..[code]
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Jun 4, 2011
How to make a chat program. Well I just copied code in and the program worked. I can send a message to the server and it sends it back just fine. But I can only send a message once. If I try to send another message I get an error and it says this "A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll" then it "No connection could be made because the target machine actively refused it 127.0.0.1:500".
Here is the link to the tutorial and code: [URL]
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Jun 22, 2009
I am trying to make a client server form application using VB2005. I am using VS2005 Professional for development.
The problem is as follows:
When more than one client tries to connect to the server. The connection is refused and the Client gets an exception in Connect() method - Target machine actively refused the connection.
This problem occurs only when 2 or more clients try to simultaneously connect to the server. For a single client accessing at a time the problem does not occur. The code segment is as given below:
-----------1 Module
Imports System.Net.Sockets
Imports System.Net
Public Class FrmMdiParent
Dim WithEvents wsServer As New Winsock2005DLL.Winsock
Private Sub FrmMdiParent_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
[Code] .....
The above exception is thrown when more than 1 clients try to access the server simultaneously.
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Mar 5, 2012
I have my tcplistener on port 5000, 127.0.0.1 as the ip and when i connect using my internal ip, 192.168.1.141 it "refuses the connection", same with the external but if i connect using 127.0.0.1 it works. how do i fix this?
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Jan 17, 2009
I have a simple chat program i have made, it works but with a few errors.
1st if it can't find the physical pc it is trying to connect to it crashes.
2nd if it finds the physical server but not the program (server) running it says "the computer actively refused the connection on IP/Port" and then crashes.
Code for connect button:
IP = txtboxip.Text
Port = txtboxport.Text
[CODE].....................
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Sep 29, 2010
I have recently started playing with sockets, so now i have set up an instant messaging app. it works like it's supposed to however, theres a slight problem. short of arranging for both parties to come online via email or something there's no way for the other person to know that someones waiting for them. So i'm basically looking for a way to send a pop-up message to tell the other dude to get his ass online,is there a way to display a message on a target pc's screen without a client application running and actively listening for an incoming command?
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Oct 25, 2011
I am developing an application that can export a DGV to excel file, so i have some references to MS Office and excel. How can I develope the program to be deployed on a machine that doesnt have Excel.. When I ran it on a new Win7 machine I have without office I couldnt even run debug because office isnt on the computer.I am not asking to be able to create an excel export on a machine without excel, just be able to run the program? Or do I need tow version of the program one for and one without excel
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Oct 31, 2010
I'm creating a WindowsForm application and I need a code to check target's machine installed version of DirectX.If the reg key doesn't match with provided one >>> load the form and launch the DX installer "redistdirectx_Jun2010_redistDXSETUP.exe"If the reg key matches with the provided one >>> launch other application "Setup.exe"
Provided version:
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftDirectX]
"Version"="4.09.00.0904"
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Aug 18, 2009
I have a program that sends some data on a networkstream through a tcp connection.
[Code]...
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Mar 21, 2010
i want make a attandance software but i need coding for make connection between attandance machine and databass. so i can connect to machine and downloadd attandace logs.
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May 27, 2009
I have developed a 32-bit VB.NET application that runs fine on 32-bit systems. Some of the folks in engineering, however, are using 64-bit machines, so we have created 32-bit virtual PCs and installed the application on the Virtual PC. When we try to run it, however, the application fails to establish a connection to the SQL server (remote, SQL 2000) for login validation.
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Apr 3, 2010
I'm having an issue here with making a WMI connection to a remote machine using specified administrator credentials.I have the WMI code inside a function, I pass it the computer's name and it returns the WMI information that I am requesting as a string (or in this particular case, an integer) from the remote machine. I'm positive it works, and returns the information I need using specified admin username/password. NOW, the issue I am having is related to (it seems) calling this function from a backgroundworker. [code] "Value does not fall within the expected range." I literally have no clue why this would throw that exception, yet when I call this function from lets say just a random button on my form, it works beautifully. The key here is that I need my WMI requests/processing to run in the background.
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Jul 8, 2010
I've created a small DLL, an addin for Autodesk Inventor, this addin saves some information provided by the user and the program to an access(mdb)database.The whole idea behind this is that it allows users to quickly find drawings, assemblies and so on.The DLL works great on x86 systems however it has issues on x64 because I used ado.net.In a attempt to solve it I forced .net to compile it with the target x86 CPU settings.
However using this I'm unable register the dll (C:WINDOWSMicrosoft.NETFramework64v2.0.50727RegAsm.exe /codebase SavetoDatabase.dll )It says its not a proper .net dll file and therefore cannot be registered.
is there any other access-database connection provider (like dao or ado.net) that works on a 64 bit machine? Or do I need to change from mdb databases to another type (like mysql)? because sooner or later all machines its running on will be converted to x64.Or do I need to register the dll in another way?I've also tried to replace the conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0 with ACE, with no luck however
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Dec 9, 2010
I develop an application using vb.net.application will run on client server architecture.when we try to execute the program in client side then it will give me an error which is related to sqlclientexception.how can i handle this situation.i used vb.net 3.5 as front end and sql server 2000 as back end.i have done total coding with system.data.sqlclient namespace.
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Aug 16, 2010
When using Sendkeys with vb.net, is it possible to tell if the target of the Sendkeys has changed between sendings?
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Dec 21, 2010
I've inherited a lot of custom made software for an office, and, while managing it, I've found it performs differently from machine to machine.I mean, some controls get painted in weird ways in some machines but well in another, or just work differently, like in some machines clicking something selects it, and in the next machine clicking the same thing makes it editable.I suspect, o course, of the myriad of DLL the software loads
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Jan 21, 2008
I want to block a perticular machine from accessing my machine..Both the machines are in LAN..I dont want a perticular machine to access my computer How can i achieve this...I want to do this using VB.NetAny idea....
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Aug 25, 2009
How do I assign a My.Settings.Item connection string to cmd.Connection connection string value?
Dim cmd As New SqlCommand()
cmd.Connection = My.Settings.Item("csStaffHoursWorked")
cmd.CommandType = CommandType.StoredProcedure
cmd.CommandText = "spSaveDeltekImport"
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May 5, 2010
I'm using the x86 target CPU setting (and .NET 2.0 as target framework if that's important) for all of my projects and components. This worked without any problems with Visual Studio 2008. My developer PC uses a x64 version of Windows 7.But now I have a new project in Visual Studio 2010 where both, the main project as well as the user control component is set to x86 target CPU, but I still get following error when I try to run my main project with the user control placed on the form:
"Could not load file or assembly 'XXX' or one of its dependencies. An attempt was made to load a program with an incorrect format."
This is the normal message e. g. if the main project has a target CPU of "Any CPU" and the component only "x86", but in Visual Studio 2008 it worked fine if I set both to "x86". Why this is not working in Visual Studio 2010 anymore or what I need to change that it works again?
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Feb 5, 2010
Is there a way to display the connection properties dialog for connection string browsing(for database) in run time?
As I want the user to be able to connect to various database using the GUI.
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Aug 3, 2011
i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:
ExecuteScalar requires an open and available Connection. The connection's current state is closed.
my code is something like this. I have shown where all i am using ExceuteScalar()
Sub Main()
Try
connection.open()
cmd.ExecuteScalar()
[code]....
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Aug 19, 2010
After running the following sub (VS debugger), I try to detach the database in SSMS, but it shows the connection open still and won't let me detach. If I close program in debugger, the database shows no connections. I check the dataadapter's connection in the finally block and is shows closed. What gives
Private Function ClientMasterDBFiles(ByVal MasterClientDBConnection As String, ByVal DBName As String) As DataTable
[Code]...
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Mar 15, 2009
I have a simple scraper. It works on some websites, but on some there is this Error:
Quote:
IOException was unhandled Unable to read data from the transport connection: The connection was closed
It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".
'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000
[code]....
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Jun 21, 2010
I am attempting to write a program that will disable the Local Area Connection while leaving the Wireless connection enabled. My company is using net-books in our stores to demo air-cards and we need to keep them off of the LAN. I'm new to VB and VB.net, and it's been a while since I did any type of programming. I've gathered some code that others have posted in forums and tutorials and I'm working through a tutorial book, but I finally believe that I am stuck.
[Code]...
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