During development, we usually use localhost as the hostname, like the following
Dim serverListener As New TcpClient("localhost", 8585)
I want the user to be able to enter their IP address via a TextBox instead, like
Dim serverListener As New TcpClient(textbox1.text, 8585)
However, this is not working for me and how can i verfiy that the user enter correct ip address .
During development, we usually use localhost as the hostname, like the following
Dim serverListener As New TcpClient("localhost", 8585)
I want the user to be able to enter their IP address via a TextBox instead, like
Dim serverListener As New TcpClient(textbox1.text, 8585)
During development, we usually use localhost as the hostname, like the following
Dim serverListener As New TcpClient("localhost", 8585)
I want the user to be able to enter their IP address via a TextBox instead, like
Dim serverListener As New TcpClient(textbox1.text, 8585)
However, this is not working for me.
I want to set my tcpclient up as a function and declare the ip and port later. However It wont let me. this is not copy and pasted code due to security reasons I wrote this code as theoretical cause I can not discuss the nature of my work. I am using vb.net 2008
I have
[code]
imports system.net
imports system.net.sockets
imports system.ipaddress
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I did a simple program using tcpclient on xp last year and it worked fine but now I have vista installed and I am getting an error now when i try to connect.
The error is "An address incompatible with the requested protocol was used."
I have a .Net program that has to run on a cluster of server 2008. To find out the right IP I resolve the dns by GetHostEntry(VarDefinedInfConfig).AddressList(0)
but when I am converting my old code (this code picks the wrong IP) dns.GetHostName().AddressList(0) => this returns a virtual IP and not the right one.So I changed my TcpListener to (dns is parameter from config)Dim listener As TcpListener = New TcpListener(New IPEndPoint(Net.Dns.GetHostEntry(dns).AddressList(0), 8001))
listener.Start()
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Are there any IP Address filters or masks available in Windows Forms as per following screenshot? A backslash shouldn't be allowed or it should be filtered somehow.
View 1 RepliesSocketException was Unhandled: Only one usage of each socket address (protocol/network address/port) is normally permitted I get this error every time i click collect a second time.
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Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesI made web browser which consist address bar that I use it to type addressess in it i.ewhen I type [URL] it opens [URL] but when I go to anther page in google it doesnot show it's link in address bar lix InterntExplorer or other international browsers so how to show any link or any sub page's link in my browser address bar ?
View 1 RepliesI'm trying to use the DHCP API (using the references on pinvoke.net) to retrieve a computer's MAC address when given the IP address but I can't get the code to work. I've run all the C# code on pinvoke.net through the C#-to-VB converter but I'm stuck now.
Here's what I have so far. The value of res is always 5 (should be 0). Thing is, I can't find any documentation on what the return codes mean
vb
Private Sub GetMACDim client As String = "1.1.1.1" Dim server As String = "0.0.0.0" Dim si As New NativeMethods.DHCP_SEARCH_INFO si.SearchType = NativeMethods.DHCP_SEARCH_INFO_TYPE.DhcpClientIpAddress si.ClientIpAddress = Convert.ToUInt32(StringIPAddressToUint32(client)) Dim res As UInteger Dim oInfo As IntPtr
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' Use Your work Group WinNT://&&&&(Work Group Name) Dim DomainEntry As New DirectoryEntry("WinNT://Wokgroup") DomainEntry.Children.SchemaFilte
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So how does one turn SSL on in System.Net.Sockets.TcpClient with VB.NET code?
Turning it on in System.Net.Mail.SmtpClient is easy, you set the .EnableSsl property. I cannot find a corresponding property in TcpClient. It's probably buried somewhere.
I am creating an application that will be talking over the LAN (and eventually, WAN) which uses the Tcplistener and Tcpclient objects.Now, I have this working absolutely fine locally using the loopack address although when I change the IP of the listener to 0.0.0.0 (listening for all IPs) and the IP in the client application, to the IP of the server, it throws an exception when connecting. The client says something along the lines of the the server has rejected the incoming connection. So i disabled all firewalls temporarily but I still have the problem.I have ran netstat on the server which clearly shows that it is listening for an incoming connection on 0.0.0.0. [code]
View 5 RepliesI 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.
I'm having a hard time getting the fundamentals down about these TCP Socket classes.
When you use TcpClient, you can set the IP Address or domain name to connect to the server end of the socket. I see examples that use "localhost" as the first parameter for TcpClient. Is this just a broadcast over the network to find the server that has a TcpListener listening on the dictated port of the second parameter of the TcpClient declaration? With any IP address for TcpClient (I realize that's an option, though), how does "localhost" find the TcpListener server?
I want to create an array of tcpclient 1 to 5. i know it can be done by arralist but how i will add array of socket in arraylist and send/receive data.
View 5 Repliesi know how to make a tcp ip connection using tcpclient and so on. But what i want to know, how to transfer file in a specific computer?
View 2 RepliesI have been reading the following thread by perito which was resolved with a great deal of assistance from Athiest.[url]...
Using the sample code in this thread I have now created a Client and Server app which is successfully sending messages over a network between two machines.
Now that I am able to send simple text messages I would like to progress to my intended pratice of sending more complex information between the machines. I have already written a program which generates and stores data with a class which I use as a data type. I would like to be able to pass this class from one machine to another.
i've a simple question: is possible to send dataset through TcpClient
View 3 RepliesMy tcp client has made a connection to the server script! Now that it has connected, how can it send a simple string? I do not know what any of the overloads for the .Client.Send method even mean, or how to use them. I already have a system set up on the server side to parse the string when it is received on the server side, but I have no idea how to send a simple string to it.
View 2 Repliesis there a way to use my tcpclient and listener to use a no-ip host because i am on a laptop
View 5 RepliesI've been working on a program where clients will send short messages to a server.[URL]
On the server side, this code is running to check for incomming messages:
Private mClient As System.Net.Sockets.TcpClient
...
Do
bytesRead = mClient.GetStream.Read(readBuffer, 0, BYTES_TO_READ)
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is there a way to send a command to start a prog on the tcpclient side.
View 3 RepliesI am making a contact management program that works like a chat conversation. First, the client connects with his/her name and says: GIVE_INFO. Then, the server sends the client's info that it gets from a csv. Finally, when the user makes all desired changes, the client "tells" the server the info separated by commas and the server replaces the information in the old csv with the new info.So, the program worked for 2-3 times then all of a sudden when I made some changes it stopped working[code].......
View 2 RepliesI've been searching for a way to route requests from a tcpclient through a proxy server, but I cannot figure out a way to do so. Can somebody tell me a solution?
View 1 RepliesFor some reason I can't append text to data I get from a tcpclient stream I have.
Dim Client As New TcpClient("server", port)
Dim stream As NetworkStream = Client.GetStream()
Dim receiveBytes As [Byte]() = New [Byte](Client.ReceiveBufferSize) {}
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The message box will only contain the returnData string without the hello.
I'm having problems retrieving the full source code of a website (it only returns partial source) with TCPClient. My code is below if you could either correct it or lead me on the right path, it would make my day. [code]
View 5 RepliesHow would i send different types (.png/.bmg/.mp3) of file over a tcpconnection (server / client)
View 2 RepliesI'm using the code below to send large strings (500kB) to a server. I'd like to show the upload speed and in order to do that, I need to calculate the amount uploaded every second.
In a Timer that fires every second I get the BytesUploaded, divide it by 1024 in order to get KiloBytes (kB/s) and show it to the user. Then I set BytesUploaded to 0 and one second later do the same process.
The uploading is done asynchronously and the size of the data is added to BytesUploaded at once. This means that BytesUploaded is not being updated in a constant flow and has a totally different value almost every second.
0
512000
0
0
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