Error In Sql Connection
Jun 8, 2009
i received a vb project from my classmate and have problem running it. when i run the program n click to view a new form, the error pop up saying "A network related or instance specific error occurred while establishing a connection to SQL server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL server is configured to allow remote connections.(provider: SQL Network Interfaces, error :26 - Error Locating server /instance specfied)" the form has DataGridViewer to view table from database. all my friends said they have no problem n they don't do any configuration at all. i am using visual studio 2008 n sql server 2008.
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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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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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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 18, 2009
I have a program that sends some data on a networkstream through a tcp connection.
[Code]...
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Sep 18, 2010
when I attempt to make the connection through a VB.Net with window application, I am getting the following error: ERROR [28000]
My connection string is
HTML
<connectionStrings>
<add name="MyConnection" connectionString="Driver=PostgreSQL ANSI;Server=10.146.152.23;Port=5432;Database=pacs;Uid=postgres;Pwd=postgres;" />
</connectionStrings>
<system.diagnostics>
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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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Jun 4, 2012
This is my connection string when Im trying to install in other computer i have an error.[code]...
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Mar 2, 2010
I'm developing vb.net application with mysql as database. The database is on other machine in the network. In one function connection opens and executes query successfully. The same function makes call to other function.This second function tries ot do same thing. But this time while opening connection it gives error-"Access denied for user 'root1'@'AZAR' (using password: NO)". Here 'AZAR' is the name of my machine. The first function uses public variable declared in module for connection, whereas second function uses local variable for connection. I'm using PhpMyAdmin tool.
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Jan 17, 2009
This is what I'm getting when I try to connect my MS Access mdb database to my program. It keeps asking me to enter a connection string and when I do this is the error I'm getting."Format of the initialization string does not conform to specification starting at index 0.
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Apr 19, 2011
This is my connection string
"Data Source=192.168.1.2,1433;Network Library=DBMSSOCN;Initial Catalog=RFX2220;User ID=sa;Password=PhhassssWord!;"
this is the error message
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.)
(1) windows port enabled
(2) server configured for windows + sql server authentication
(3) & also enabled for TCP/IP
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Aug 26, 2010
I created an vb.net Application with microsoft visual studio 2008 and Access 2003 as Database.
The application work fine in XP O/s but when i run the application in Windows 7 it gives error when connecting to Database.
It works fine when i create an new Access 2003 database in Window 7.
It gives error System.Data.OleDb.OleDbException: Operation must use an updateable query.
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Feb 11, 2011
Is there a way to catch a database exception and then redirect to an error page? I have a data access class that I use to make a sql connection and then functions that call it to execute my SQL commands. My problem is that if my database is not available I cannot catch that error. Here is the code I am using in my class[code]...
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Aug 1, 2008
I'm working on an application that communicates to torque controllers on the factor floor. The user inputs an IP address and a port and clicks the btnConnect button to make the initial connection. Once that completes a KeepAlive message must be sent periodically to maintain communication with the torque controller. The initial connection works very well but a socket error (see below) grinds everything to a halt when the KeepAlive message is sent. I would appreiciate any ideas the readers may have on the root cause. I'm quite confused because basically the same code is use for both the initial connection and then the KeepAlive messages. I have pasted some of the code as well below.
[code]...
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Feb 25, 2009
I get this error
Format of the initialization string does not conform to specification starting at index 34.
When I take my connection string and store it in the project settings. I know that this works.
Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Application.StartupPath & "\Employees.accdb
Because if I use it like this
Dim conn As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Application.StartupPath & "\Employees.accdb")
conn.Open()
The connection succeeds but if I try this
Dim conn As New OleDbConnection(My.Settings.Default.employeeConnection)
conn.Open()
I get that error.
name:employeeConnection
type:string
scope:application
value:Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & Application.StartupPath & "\Employees.accdb
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Jun 3, 2009
I get an error using the connection string (url...) to connect to my SQL CE saying that "Provider 'Microsoft.SqlServerCe. Client.3.5' is not registered in the local PC.".In my project I have a table connected (with the wizard) to the same database and it works fine, but when i try to connect with my own code it FAIL. [code]
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Nov 19, 2011
I get this error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '*' at line 1 [Code]
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Apr 12, 2012
so for one of my assignments i have to use a databse that the professor provided but every time i attempt to establish a connection to the database that i downloaded it gives me this error, i have tried on both my desktop and laptop with no success. the picture is kind of hard to read but hte error says The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local deafult machine.
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Nov 15, 2011
I am getting errors when I try to use this adodb.connection and command in my code. The error I am getting is saying that the connection and command are not defined. I read online that depending on your version of vb that you might use the "OLE" connection instead of ADODB.
Imports System.Text.RegularExpressions
Imports System.Data.OleDb
Imports System.Data.SqlClient
[Code]....
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Jul 5, 2010
I'm trying to insert data into a mysql database, I'm using xampp as well if thats of any relevance? I keep getting this error: Connection must be valid and open.
on cmd.ExecuteNonQuery()
I'm following my Microsoft Access application that I've also written as a reference and that works perfectly.' This is the code for inserting into an access database which works and is tryed and tested:
Imports System.Data.OleDb
Public Class frmEnterDetails
'text box variables
[code]....
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Jun 6, 2011
For my current Project I need to fetch the data from an excel file.Each second the data in the excel file is changing... What I want to do is, copy it from the excel and Validate it in every second.So I use an Oledb connection to get the data from Excel file... s working excellent for two hours... After 2 hours I am getting an error that"the connection for viewing your linked microsoft excel worksheet was lost......"
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Dec 13, 2009
Sometimes when my server is down or busy, I get an error saying "connection timeout" while connecting to MySQL. But with the error the program also crashes. My question is how can I prevent crashing, it would be better to show a msgbox when this happens. (visual basic 2010)here is a screenshot of the error
I use this,
Dim connStr As String = "Database=mydatabase;" & _
"Data Source=datasrc;" & _
[code].....
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Feb 8, 2011
I have a web app with a separate DLL for Data access.[code]...
I use Telerik controls to display data and initially went to them for help, but they can find anything wrong in the way I've coded the controls.
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Mar 10, 2010
I am trying to upload a SQL dataBase onto VBasic, but I keep getting a connection error Error version 655, the application useses versions of 612 and earlier.What can I do to fix this error. I am using SQL server 2008 and Visual Basic 2008...
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Nov 3, 2010
i am new in vb.net in the login form if i enter an invalid username the next time i enter a valid one it gives me this error "Not allowed to change the 'ConnectionString' property. The connection's current state is open."a with the following codeImports System.Data Imports System.Data.OleDb Public Class LoginForm1 Dim DbCon As New OleDb.OleDbConnection Dim dbUp As New OleDb.OleDbCommand Dim Read As OleDb.OleDbDataReader
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
DbCon.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data
[code]......
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Aug 26, 2010
How can i make ms access and vb.net program setup compatible with windows 7. my program setup give oledb connection error in windows 7 but it successfully run in xp.
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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 SQL Server 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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Feb 9, 2011
I have an application with a datagrid and a save button.Here's the save button
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
Me.Validate()
Me.PlayerCharacterBindingSource.EndEdit()
[code]....
I'm getting the following error upon clicking the save button."TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance."
It's on this line: Me.TableAdapterManager.UpdateAll(Me.DataSetPlayerCharacters)
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Aug 22, 2009
I'm working on a project that getting infos from an Excel book. I've created an Excel book (called as "Kitap1.xls"), entered some infos and created a table (called as "asd") Then I added a DataGrid object on Form1 and codes setteled below; [code]Program is running but the infos ,which in the excel book, do not appearing in DataGrid1 object.
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Sep 4, 2009
I want to connect to Oracle with Sys user but getting an error :ORA-28009: connection as SYS should be as SYSDBA or SYSOPER Can anybody suggest me the connection string with sys user oracle through vb.net
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