I am trying to connect to an attached mdf (SQL Express local) file, where i want to delete all the stored procedures. When i execute my code at executenonquery command i get the error "There is already an open DataReader associated with this Command which must be closed first.".
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I want to know how to connect to a remote system having some shared folder.(ex, \myservermysharedfolder).Actually, I was supposed to copy a particular file which is available in a shared location of a system. To copy that file, first i need to connect to that system with an user id and password.I know copying of file (), But not getting clear idea on how to connect to the shared folder. I have tried with System.Management class, but no use..
View 2 RepliesI have been reading about ADO, SQL, datasets, data adapters etc and have gone into information overload. My next step is to create a simple data file of my own that I can manipulate, update, sort etc in VB Express. Do I need another piece of software? I read about MySQL, which I understand is primarily used to access databases on the net, but can that be used to create a simple local data file on my PC? Can you simply hard code something in VB Express?
View 6 RepliesWe have a VB.Net application which works fine in our tests in different Windows XP SP3 machines. However there is one machine in which is displaying this error:
Unable to connect to any of the specified MySQL hosts
Using the mysql command, we can successfully connect to the database. We already checked for any other application or firewall that could be blocking the connection but it seems fine. We also reinstalled the system (no errors during the installation) but the MySQL error message doesn't change.
The system settings are exactly the same as in the other computers. We are using "localhost" as server in the connection string. The "hosts" file has its default values (nothing strange in there).
how can I send a Message String with Attached File? AFAIK, we are sending Message String via Byte Array.
View 4 RepliesIs it possible to connect to a database on SQL Server R2 Express from Visual Basic Express? I am following a set of tutorial videos done in SQL Server 2005, but cannot seem to connect to create the database. I have created the database in SQL Server R2 Express, but cannot connect. Is there a work around?
View 4 Replieshave this code to connect to local server:
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I am using VB 2008 express and SQL Server 2008 express on a test basis and I used to connect VB express to a SQL database (created in SQL Server 2008 Express management studio) file and it work perfectly until my hard drive packed up and I had to get a new one, so I had to reinstall both of these again and copied my old databases from a backup I had. Now when I try to connect to the database file it cannot connect. Network related error or the instance name is incorrect. When I look at the advanced options in the connect dialog it shows my instance as .SQLExpress and my correct instance name is .SQL2008Express. I clicked OK on the connect dialog and manually changed my connection string to the correct instance and that worked but whenever I run the application in debug mode it give me the same error as above.
View 1 RepliesNormally i dont use MSsql databases but i was wondering how it works. A friend of mine told me its almost the same as as using MySQL well i can tell its not.I'm used to use mysql in vb.net but i don't get this local sql database to work.Where does it go wrong after checking allot of things it going wrong at opening the connection.I will show you in 2 code blocks what i actually do.First of all i create a SQL class so i don't have to write alot of code over and over. (remember the class ain't finish but its enough to make a connection)(local Database used and iam working in VS2010 Ultimate)
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The program should do nothing except showing some data out of the database in a textbox at moment. Like i said before already i know for sure its going wrong at opening the connection.The database doesn't have a password.
Well i somehow failed to use the search on this site. How do i connect to an online mysql database via VB.NET? I did lot's of search the past few days Could not find my answer.
View 11 Repliesi'm using a copy of visual basic express for my home projects. i'm just started one that is needing a local database, so i added one to the project and created the tables with with colums no problems.
i created an 'Admin' user straight into the database and use that to log in. i have also created an a form so that you can add other users and view existing users in a datagrid view.
the original source code i used was supplied in on this forum page:
[URL]
its all well and good, and works fine, right up to the point when i shut the program down and then re-open it the next day, all the users i created the previous day arent there anymore.
the code for creating the users is this :
Dim con As SqlCeConnection = New SqlCeConnection(My.Settings.Database1ConnectionString)
con.Open()
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An Error has occurred while establishing a connection to the server. When Connecting to a SQL Server2005, this failure may be caused by the fact that under the default settings SQL server doesn allow remote connection (provider: Named Pipe Provider, error: 40- Could not open a connection to SQL Server)I want to connect to the SQL Server 2005 Express Edition which is running on my system from a VB.NET application. I am using Visual Basic 2008 Express Edition. Here is the Coding,
Dim sqlConn As SqlClient.SqlConnection
sqlConn = New SqlClient.SqlConnection("server=localhost" & "initial catalog=LIB")
Try
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The application sits on a virtual environment and when I remote in and run the application, it connects to the remote database. However, when I remote in with a service account and double click the same .exe, it tries to connect to the local host database and ignores the app.config. The code is the same, only the login name I use is different. The login I use is part of the local admin group. Any ideas?
View 2 Replieschange the .txt extension of the attached file to .rar 123.txt (595.23K)Number of downloads: 79 Its the whole Project file including a video in to illustrate the weird error! Since is almost impossible to describe the error! For all of you who will try to open the project using visual studio be sure to Import the files in the rar for model model file.txt and catalogue file.txt for catalogue
'Marios Solomou
Imports System.IO
Public Class DAC
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I know how to display attached modules but how do i check if a file is locked by a dll.
View 1 Replieshow can i deploy windows application developed using Vb.net and Sqlserver R2 Express as local database?..how can i make it in setup format(including sqlserver) to deliver to clients?is it compulsory the client should install SQL Server R2 Express in his system apart from the installation of this windows application?
View 5 RepliesVisual Basic 2010 Express, lets the user to add a Local Database with .sdf extension. These databases needs MICROSOFT SQL Server to be created or they can run in the user's pc without any additional software? What are the limit of these databases unlike an external database?
View 2 RepliesI have a problem with attaching sql server database to an installer file.
View 1 RepliesI'm so glad I found this forum. I have been trying for days to connect VB.NET Express to SQLExpress using a very simple, one-table database just for testing with no luck. Then I found this forum and the FAQ and used the template for binding a VB Form to SQL and with a few slight modifications and had success.
I'm connecting using the default instance of SQL (no user instance) and after substituting the the "user Id=" and "password=" section of the connection string with "Integrated Security=SSPI" I was finally able to get data returned from SQL server into VB in a Grid Control.
Now for my question. It's a general thing. Yes, I got that to work but in a complete database scenario, would the connection to the database be done in a Public Sub and left open throughout the duration of the GUI interface (passing in the user ID and password as needed) ..until the user logs off? In other words, the template example closes the connecttion immediately after retrieving the data from the database - and I realize this is an example of simply connecting. So, What is the usual scenario (in the real world for connecting and keeping that connection open for the duration of a user session. Where in the VB app should the connection string really be placed and the connection.(close) be placed?I'm not looking for an extremely detailed answer, just an "in general" scenario.I tend to dive in head first and so, I truly look for answers elsewhere before posting a question but haven't really found an answer to this exact question.
how to open a PDF file attached in ms access using Adobe PDF Reader tool?how to connect this tool with database?
View 12 RepliesBasically back in VB6 days, I created several VB6 apps with Access as the backend database. I'd package my Access db file with the application setup, which copied it on to a shared network drive, and then different computers on the LAN could use the same backend database file, and that worked just fine. With SQL and VB .Net, I've done work with a SQL database hosted on a remote server, so you can basically build your query string easily and anyone can connect to it from anywhere, and it works just fine.However, what I'd like to do is have a local SQL express database as the backend for a VB .Net application and make a setup program that can install it in a way that it could be shared on a Local area network, without the user who is installing the application do anything.
I know about building a connection string with the local machine name, but I don't really have any experience with including an actual MDF file with the application. Does anyone know how it works, and is it a better approach? Does it work similar to placing an access file in a shared unc path?I know that ClickOnce (which is awesome) can install SQL express easily on a user's machine. However, the key is that I want SQL express to be installed only on the machine that is going to be the database server in a LAN enviornment, and not on every machine, unless it is neccesseary. And then how does your VB app know how to build the connection string to access the database from any machine on the local share?
I am working on moving a project from VB6 to VB 2008 Express. [Code] When I connect to mysql db in VB6, I connect using adAsynConnect. This way, I have a "Loading..." animation display while a connection is attempted. Is there a way to do this in 2008 Express? Or something similar I could read up on?
View 4 RepliesIn the beta version of Beta2 of Visual Studio Professional, when I choose add new connections, I can select a I can select a " SQL Server (SQL Client)" datasource, which works great with my SQL Server Express DB running on the local machine.
In VB2008 Express, though, I can't select a "SQL Server" in the datasource dropdown. I can only try to connect to a Microsoft SQL Server Database File.
When I actually try to connect using the .mdf file that is being managed by my local SQL Server, I get an connection error -- can't make connection to the server (and the usual message about enabling remote connections".
I am using this connection string to connect to my database and still it won't connect[code]....
View 3 RepliesI have created a db in sql server 2008. I am now trying to connect to it from vb 2010 express project. When I try to add the data source, I get the error "You don't have permission to open this file". I have change the Auto Close option to True on the db.
After further testing I found if I opened BV as Administator I was able to add the db.
I am trying to figure out how to connect to a MySQL Database and manipulate it using VB Express 2008
View 6 RepliesIs there a way to use VB 2008 Express to connect to Oracle 11? When I go to add new data source I dont see anything for ODBC
View 2 RepliesI try to use my data source and setup a new connection, but i see it wont let me.Is this another features they left out of 2010 express edtions?I just want to setup a connection to sql server with vb.net express 2010?
View 2 RepliesI'm trying to read and load the content from the attached text file to a arraylist with the code bellow.
but what is happening is that not all the lines from the text file are loaded in to the arraylist, the reading jumps from one line to other in the text file.
Dim FILE_NAME As String = ((My.Application.Info.DirectoryPath).Substring(0, (My.Application.Info.DirectoryPath).LastIndexOf(""))) & " est.txt"
Dim lista_barras As New ArrayList
Dim lista_barras_esp As New ArrayList
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'm trying to use Visual Basic 2008 Express and connect to a DB of SQL Server 2008 Express but ... you can tell me why in the Database Explorer and the Data menu of VB only have the following options for data source? Microsoft Access Database File Microsoft SQL Server Compact 3.5 Microsoft SQL Server Database File does not have the options Microsoft ODBC Data Source Microsoft SQL Server obs.: I have the Visual Web Express 2008 installed, and there are the options available.
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