[2008] Error - Unable To Read Data From The Transport Connection: The Connection Was Closed
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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Nov 23, 2010
I am trying to send messages from my application to a yahoo account and I am getting the following error:failure sending mail..Unable to read data from the transport connection: net_io_connectionclosed.Is this because of the LAN and work or something else/ [code]after the line mailobj.send executes it stalls for a while and then the application ends.I checked all the parameters and they seem correct
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Apr 1, 2009
I am building a chat client/server. And I can connect and chat just fine, but when a user disconnects, the server does not recognize this and acts weird, often spamming the last message that was sent by the user..Also, it's like the client does not disconnect from the server even when I close the client app. Once I exit the program, VB acts like it is still debugging. Once the server is shut down however, I get this error:
IOException was unhandled:Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
serverStream.Read(inStream, 0, buffSize)I don't know how to make my client and server accept the fact that a client has disconnected...
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Aug 4, 2009
I'm building a TCP/IP server that sends small strings and updating my database, every time the client connect i get this Exception:
unable to read data from the transport connection: an existing connection was forcibly closed by the remote host. The client successfully able to connect to the server and everything working fine even though this Exception raise, but if i send 3-8 request in the same second the database do get updates in all of them but the server failing to send "OK" response to the client in about 3-4 of those requests, the line i get the error is this: bytesRead = mClient.GetStream.Read(readBuffer, 0, BYTES_TO_READ)
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Nov 22, 2011
I am getting following exception:
[Code]....
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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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Dec 19, 2011
Try If functionmode = "ADD" Then
[Code]...
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Jul 5, 2011
I got this error..The connection was not closed. The connection's current state is open.
This is coding to add data in Ms access in vb...
Imports System.Data.OleDb Public Class Form1
[Code]...
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May 20, 2010
I'm developing a device app in VB.net that will access a SQL Server database. I need to establish a connection when the app is launched, and keep the connection open until the app is closed. I've done the following:In the Master Module:
Public CNN
As SqlConnection
In the Main menu form load:
CNN =
New SqlConnection(sqlConnString)
CNN.Open()
Then when I want to read from the database:
Dim sqlDR
As SqlDataReader
SQL = "SELECT Name FROM Table"
[code]....
When I run the same code without the global CNN, but rather dim the connection inside the Select function, all works well.
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Mar 11, 2010
I'm trying to insert a new records into database, one of those records is a "datetime"...when I type a wrong date, and try to insert those values into database, i get an error (about wrong typed date etc.)...ok, that's fine, things need to work that way. But here comes the problem, I correct the date, and then try to insert values again...here I get an error from the post title. And this doesn't work until I close that form and run it again...here's part of my code:
Dim cvLicence As New SQL
Try
cvLicence.upis("INSERT INTO blabla (itsnotimportant) VALUES ('something')")
MsgBox("everything's fine", MsgBoxStyle.Information)
[code]....
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Jun 12, 2011
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
exitwithout()
[code].....
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Sep 25, 2011
Im having 2 errors when loading the form the first one is: "The connection was not closed. The connection's current state is open" and the another one says "Conversion from string "" to type 'integer' is not valid" and everytime I change cmb_Suc appears: "The connection was not closed. The connection's current state is open" [Code]
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May 19, 2012
Below error is thrown in a already opened program which connects to different database
A transport-level error has occurred when sending the request to the server.
(provider: TCP Provider, error: 0 - An existing connection was forcibly closed by the remote host.)
Program details: code done using vb.net with MSSQL 2008 as back-end
Two instance of same exe where running simultaneously in same PC but error was thrown only by one instance Program uses both sqlconnection(ADO.NET) and ADODB connection(upgraded from VB6) and the error is thrown by both types of connection. If the error is due to network problem with the server then why few programs work fine? I am not able to trace the reason for this behavior of the program. Can I know why this error occurs and why only in few programs of same instance.
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Jun 4, 2012
When I call the restful service with the following code, I am getting the error
[Code]...
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Dec 4, 2008
I'm creating a program (Which will eventually be a service) which loops a section of code which downloads files from a variety of FTP servers.All files are succesfully downloaded on the first iteration, however after this the download fails with the following error..."The underlying connection was closed: An unexpected error occurred on a receive."Curiously, the error does not occur if the loop only downloads the same file from the same Ftp server. It only occurs when 2 or more files are downloaded.I use the following code...
Dim fwr As FtpWebRequest = CType(FtpWebRequest.Create(Supplier.FTP_Address & Supplier.FilePath & Supplier.FromFile), FtpWebRequest)
'Set credentials
fwr.Credentials = New NetworkCredential(Supplier.Username, Supplier.Password)
[code]....
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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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Apr 26, 2010
I have a form that contains a crystal report viewer. When I open this form, it runs a report. I am using a .LDB viewer to tell who is logged into an access database. I noticed that when this form opens, the computer logs into the database and stays logged in. Even when the form is closed, the computer is listed as "logged in". If I run the report again, it just adds another instance of that same computer logged in. Therefore, it continues to pile up logins until the application is closed.
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Nov 15, 2011
I have the following code that I'm trying to retrieve the HTML document. Not sure why it wouldn't work. Here's what I captured from Live HTTP Headers:
[Code]...
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May 31, 2011
for example i have this code :
Sub Month()
Dim Conn As New Data.OracleClient.OracleConnection
Conn.Open()
Try
Dim Cmd As New Data.OracleClient.OracleCommand
With Cmd
[Code]...
What will happen to the datareader when the Connection is closed ( Conn.close)
Will the Cursor that is used by the datareader be freed ? or will it stay open ?
If the cursor that is used by the datareader is still open , when will it be automatically closed ? or should i just closed it manually ?
Will it cause the dreaded "ORA-01000: maximum open cursors exceeded" ?
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Oct 6, 2009
I have a windows service I created that checks for data to post to an off site webservice over SSL. The service checks every 10 seconds for data to send, if there is data it opens a connection to the remote webservice, and closes the connection after 120 seconds (still checking for data to send during this time). The service works fine if a user is RDP'd into the server, but as soon as no one is logged on and the service attempts to push data, I receive the following error:"The underlying connection was closed: An unexpected error occurred on a send."I have tried running the service as a local service, network service, under my login, and under a service account, but nothing seems to work. The PC it is running on is a windows 2003 server (virtualized - vmware)
Protected Overrides Function GetWebRequest(ByVal Uri As Uri) As System.Net.WebRequest Dim oWebrequest As System.Net.HttpWebRequest = MyBase.GetWebRequest(Uri) oWebrequest.KeepAlive = False oWebrequest.ConnectionGroupName = Guid.NewGuid.ToString oWebrequest.ProtocolVersion =
[code]....
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Mar 28, 2009
I am using MySQL 5.0 as back end. I am using MySqlData.dll in my project. When i am trying to execute the following code,
Try
Dim cnData As New MySql.Data.MySqlClient.MySqlConnection
Dim lcmd, lcmd1 As New MySql.Data.MySqlClient.MySqlCommand[code]....
I am getting error message as "There is already an OpenDataReader associated with this Connection which must be closed first." I have to use overlapped multiple datareader
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May 14, 2010
This will happen at random, and I can always just catch the error and re-establish connection to the server, but I am confused as to why. When doing lots of inserting into the sql server, I only establish one connection that is public, instead of many little connections. I had my doubts on a public sql connection, but it's been running great, and I've seen no problems until this morning. Again, this random moment I hit an error that stated, sql connection state is broken. Is it bad practice to just accept this error, and when it happens, re-establish the connection?
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Aug 2, 2010
I am using the visual studio 2008 but use the guide for 2oo5 .I wonder why the program show error after click the load button (btnload). I am following the http: [URL] and having problem with the 'Filling the DataSet'. Is it because of different version?
The code I use:
Public Class Form1
Private Sub Ordered_booksBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Ordered_booksBindingNavigatorSaveItem.Click
Me.Validate()
Me.Ordered_booksBindingSource.EndEdit()
[Code] .....
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Feb 29, 2012
I have this as my transactions code and I'm having an error connection closed . Iv tried fixing it with odb.open but i dont know where should I put it
[Code]...
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May 9, 2012
I have a problem connecting to an access database. I'm currently trying to build a login/register program that reads the username and password from a database and allows login if the specified username and password are found. I have code that will work properly for that so that's not an issue. However, when I make an attempt to register a new username along with a bunch of other things such as email, password, etc. I am unable to because the database connection is closed. The code I'm currently using to open the database connection is :
[code]...
However, when I try to use this code to open the connection to the database, it leaves the connectionstate closed. I decided to then build in as a test, a block of code that would check on load to see if the connectionstate is open or closed. Each time I've run it so far by making a few changes it always tells me that the connectionstate is closed no matter what I do.
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Oct 21, 2011
In VS2010 VB create a data connection using this:
[Code]...
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Jan 22, 2012
I have create a simple app in vb.net that receive data from a bluetooth device ( data are simple strings like "90123.9mm"). Is there a way to check if the device has closed the connection ?
[Code]...
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Oct 19, 2011
I am using crystal report (procedure bind) which is not releasing connection when I exit from report. I am passing parameter to crystal as :
[Code]...
Which closes connection in UI but not releasing connection of crystal report.
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May 19, 2010
I have a fat VB.NET Winform client that is using the an old asmx style web service. Very often, when I perform query that takes a while or pass a large amt of data to a web service in a dataset, I get the subject error.The error seems to occur in < 1 min, which is far less than the web service timeout value that I have set or the timeout value on the ADO Command object that is performing the query within the web server.It seems to occur whenever I am performing a large query that expects to return a lot of rows or when I am sending up a large amount of data to the web service. For example, it just occurred when I was passing a large dataset to the web server:System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the rem
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Sep 19, 2011
I have an application that copies a file from a network/internet location. I am trying to catch the exception for when the network connection becomes unavailable (or internet goes down). Currently i catch the exception "Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host." which occurs on the bold, underline line below.The issue i have is i try and attempt the operation to continue doing what it was doing by resetting variables and then reassigning them to continue reading the stream but cant get past this error. The only way to go past it is to stop and start the application which is not what im after. [code]
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