Networkstream Connection Fails & Httpwebrequest Connection Not Reading Fast

May 17, 2012

I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files. If I use method "CONNECT" it does not connect to the stream.

While (True)
webrequest = DirectCast(Net.WebRequest.Create(url), HttpWebRequest)
webrequest.Credentials = New System.Net.NetworkCredential(username, password)
webrequest.Method = "GET"

[code]....

should I increase the buffer size and if so what is the max? that would mean I can read more data at a time and keep up with incoming push. Disparate here.

ACtually also I noticed that it gets stuck on this line

numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)

and then eventually I get disconnected.

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Networkstream Connection Fails & Httpwebrequest Connection Not Reading Fast Enough

May 17, 2012

I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files.If I use method "CONNECT" it does not connect to the stream.[code]

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Sends Data On A Networkstream Through A Tcp Connection - Error "An Established Connection Was Aborted By The Software In Your Host Machine"

Aug 18, 2009

I have a program that sends some data on a networkstream through a tcp connection.

[Code]...

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.net - Stream Connection Using Httpwebrequest?

Apr 3, 2012

I have created a httpwebrequest connection to a streaming API after trying a tTCPClient which just never ended up working. My concern is whether my code is correct and that I am actually reading in new data and that the connection is maintained. Initially I had been reading into a buffer and just loaded everything into a file after max size, but figured it would be simpler to read a line, since each entry was being sent delimited by line feeds.

rStream = webrequest.GetResponse().GetResponseStream
rStream = New GZipStream(rStream, CompressionMode.Decompress)
If rStream.CanRead then

[code]....

It looks like I am continuously reading and not sure if I am reading redundant data here. Also another question is that if I were to use a thread to appendToFile, would that maintain the connection to the stream?

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PHP Connection Using HttpWebRequest And Get Method?

Apr 26, 2010

I have a script returns a string:

[URL]

PHP script:

$data = $_GET['q'];
$query = "SELECT * FROM `table` WHERE ID = '$data'";
$result = mysql_query($query);

[Code].....

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Add Connection Wizard Fails With Access Database

Nov 14, 2005

I have the RTM version installed. I am quite puzzled at this wizard. It works fine with SqlClient. But for Access databases, this wizard completely fails.In this wizard, I only have one option to do - setting the ConnectionString. [code]

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TCP / IP Server - Remote Connection Fails To Connect

Mar 27, 2009

I've came across a little problem with my tcp / ip server. My client can connect to it with 127.0.0.1 ( localhost ), and 192.168.0.X, but every remote connection fails to connect.

Here's the connection rituals:
Server
listener = New System.Net.Sockets.TcpListener(System.Net.IPAddress.Any, Port)
listener.Start()
listenThread = New System.Threading.Thread(AddressOf doListen)
listenThread.IsBackground = True
listenThread.Start()

Client
client = New System.Net.Sockets.TcpClient(IP, Port)
client.GetStream.BeginRead(readBuffer, 0, BYTES_TO_READ, AddressOf DoRead, Nothing)

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Connection To LDAP Fails Unknown Username Or Bad Password?

Mar 23, 2011

I would really welcome some help with this issue. We have a php code that works and connects to the LDAP. When I try to connect using VB.NET 2010, it fails to bind with logon failure unknown username or bad password. Below is the connection information. When I talk to the folks who run the ldap server, they say I am binding sucessfully, below is the log file for the sucessful bind? If I continue and try to execute a search I don't get any results. The server is running openLDAP ver 2.3.39 on a linux server, server requires connection on port 636 for secure connection, or 389 for anonymous.

[Code]...

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Insert Pop Up Error If Connection Drops Or Download Fails

Feb 7, 2011

I built a dwonloader program which download a file from the web. I would like to insert an error message that pop up whenever the program fail to download the file and/or when the computer gets disconnected from the internet while the program is downloading the file.

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VS 2010 Using Proxy In Httpwebrequest - Unable To Check Any Outgoing Connection From Application In Fiddler

Aug 5, 2011

I m using proxy in httpwebrequest

[Code]...

But i m unable to check any outgoing connection from my application in fiddler how i can check what request my application sent to server if i m using proxy

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Assign A My.Settings.Item Connection String To Cmd.Connection Connection String Value?

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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How To Make PHP Connection While Reading Script

Sep 17, 2010

I can't find the vb.net code to make PHP connection while read the script before it would redirect to mysql database. As I have store the local host in the php script with the username and password, so I would not need the code for mysql at this present moment.

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Display Connection Properties Dialog For Connection String Browsing(for Database) In Run Time?

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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Error - ExecuteScalar Requires An Open And Available Connection - The Connection's Current State Is Closed

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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Sql Server - .net Program Dataadapter Connection Closes After Fill But Database Still Shows Connection?

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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[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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Disable The Local Area Connection While Leaving The Wireless Connection Enabled

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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ExecuteNonQuery Requires An Open And Available Connection, The Connection Current Stat Is Close?

Nov 30, 2008

i make a class and when i call on form then that error occurs "ExecuteNonQuery requires an open and available connection, the connection Current stat is close "

Class Code isImports System.Data.SqlClientImports System.DataImports System.StringPublic Class DatabaseKits Dim Cn As New SqlClient.SqlConnection Public Function BuildConnection() As Boolean Try Cn.ConnectionString = "Persist Security Info=False;Integrated Security=True;Trusted_Connection=Yes;database=BizAimsPro2008;server=Server-2k3s" BuildConnection =

[code]....

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Winforms - .net Connection Entity Framework Connection String Security?

Sep 3, 2011

I understand the possibilities for encrypting a connection string in .net v4. I have a win forms application that will be used by multiple people on different machines. I understand that I need to protect the connection string at time of the app being first run on the target machine. However I am concerned that for a period of time my connection string will be unencrypted. I am looking for advice in how to deploy my app with the connection string already encrypted or encrypted during installation. encrypting the connection string in a secure way?

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.net - Connection Was Not Closed Connection's Current State Is Open?

Dec 19, 2011

Try If functionmode = "ADD" Then

[Code]...

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Connection Was Not Closed Connection's Current State Is Open?

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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Invalid Connection String When Modifying Tableadapter Connection?

Jan 19, 2011

I'm developing an app in vb.net (visual studio 2008). I have a Teradata back-end that will be supporting multiple users in a production environment. I need to use variables in the connection string as the user/pass will be changed every 3 months.

For the gist of the application:

In it's most basic form - I have a search form which works correctly - it pulls results into a listbox and the user then double clicks the list box which will then open a form that is bound via table adapter to the back-end table (Teradata). My connection string is fine everywhere in the application. My problem is using a modified connection string for the "fill" function of the table adapter once the form is opened.

I'm using the code below for the on-load event and keep getting an "invalid connection string" - again, the connection string works fine everywhere else in the app, and the variables etc... are working correctly.

Private Sub adaptertest_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim DBConnStr As String = "Provider=TDOLEDB;Data Source=TDDEV;Persist Security

[Code].....

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Mdb Connection - Transfer File Path In Our Connection String

Aug 26, 2009

I'm facing a problem after installation any software setup that has a database in access(mdb file) How to I transfer file path in our connection string.

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The Connection Was Not Closed. The Connection's Current State Is Open

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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The Connection Was Not Closed..The Connection's Current State Is Open?

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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VS 2010 Difference Between Closing A Connection & Disposing A Connection?

Sep 7, 2011

When it comes to database connections what is the difference between closing a connection & disposing a connection? I'm hoping to gain a more technical understanding of what happens when each is called & the effect on the database.

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Limitations Of OLEDB Connection When Reading Excel File?

Feb 15, 2012

I have this program that uses OLEDB connection to import excel file to data table then use it in other functions.Now I have this question: What are the possible limitations of OLEDB when it reads the Excel file. The File is on xls format, and I want to know if there is such limitations(for example: It has limitation in reading value on a cell).

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VS 2008 - Connection String Bug - Reading A Tab Delimited File

Aug 2, 2009

I want to read a tab delimited file so i set up a data reader with the following connection string: [Code] However when I do this it doesn't seem to delimiter at the tab characters (I cannot work out why it is breaking up the data where it is). the first few lines of the csv are in the attached "dbamstr.txt" - the select statement I am running is: "SELECT * FROM dbamstr.txt".

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Asp.net - Reading CSV File With OLEDB Ignores First Line Even With HDR=No In Connection String?

Jan 4, 2011

We're converting a Classic ASP site to an ASP.NET site. One function was to upload a 'template' of data in CSV format for importing into the database. There were several different record types in there (the first field always indentifies the type of data).The task was to get the CSV into a DataTable so it could be validated (new project is to have MUCH better validation rules)

The code seemed pretty straightforward - watered down (taking out comments, Try/Catch, etc) it is as follows:

Dim da As New System.Data.OleDb.OleDbDataAdapter
Dim cn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strDirectory & ";" & "Extended Properties=""Text;HDR=No;FMT=Delimited;""")

[code]....

The DataTable (dtData) is populated, but only starting with the second line of the CSV file DESPITE the fact that "HDR=No" is in the connection string.

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