Accessing Database On The Network?
Dec 3, 2009
i'm using
Public con As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Tramsco\Tramsco\payroll.mdf;Integrated Security=True;User Instance=True;MultipleActiveResultSets=True")
as my connection string and when i run the .exe from the other computer to access the database on the host, it gives me this error:
An attempt to attach an auto-named database for file C:\Tramsco\Tramsco payroll.mdf failed. A database with the same name exists, or specified file cannot be Opened, or it is located on UNC share.
but when i use the computer where the program is, i can run it with no problem.
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Jul 12, 2011
I have developed a windows application for my company. It is a multi user software and we are using sql 2008 as the database. The sql 2008 is installed in our company server. Within our LAN, there is no problem in accessing the software and its working pretty fine.
Now the problem is, some of the managers need to go out frequently(for business tour and all) and they need access to this software. The software is already installed in their laptops.Is there any way to access the database that is in our company server ???
We have few static IPs with us, is there any way i can use that here (Using NAT in the firewall or something)?
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Oct 8, 2009
From my vb.net code I am trying to set a printer name for the crystal reports printing
rpt.PrintOptions.PrinterName="johnKingHP LaserJet 2200 Series PCL"
But when I go to windows-->Start--> Run and enter JohnKing
It is showing me Printers and Faxes folder and Scheduled task folder. But when I open Printers and Faxes it will show the adderess as Printers and Faxes on JohnKing.
From my web application I want to sent the Printer name is the name shown above.
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Aug 18, 2009
Here is my idea so far: I have a bunch of computers connected in a local network. One of them is a MySQL server, one will have a vb.NET program wich will act as a "second server" and the rest will be different clients. What I want to do is that the "second server" will send out some kind of message or network package to some of the clients in the network, and they will execute a code based on what message it is, or what kind of package it is. I'll give you a simple example:
[Code]...
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Mar 30, 2008
I am trying to copy a table from a network database to a local database. I used DAO and could check if the network table existed using a function that tried to assign a TableDef object to the table in question. If there was no error then I assumed that the table existed and the function returned true...Or it would error out and return false.I could then proceed with the copy or not as the case may be.I am converting the code to ADO.net and need to know how to check for a table. [code]
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Mar 18, 2010
I am currently working on a project for school. I have the project all laid out in my mind and everything but there is one thing that stops me. I can not access the data from the database itself ...
(detailed info)
I am using an AMD Athlon x64 bit processor with a windows vista 64 bit operating system. I am writing the program on visual basic 2008 express edition. When I open up the visual basic 2008 express edition and create a new project the first thing I do is go to the view menu and activate my database explorer. I connect to the database in question through the database explorer. The database I am connecting to is an access 2007 database (ive opened up the access 2007 files and they do open and display information properly, in otherwords, they do work) I then put in a listbox and use the following lines of code in a form load event to both A) create the datatable and B) automatically fill the listbox with the database info.
Dim dt As New DataTable()
Dim connStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=MEGACITIES.MDB"
[Code]....
When I test the program the listbox does not fill up with any information from the MEGACITIES access 2007 database. Ive tried connecting to the database by establishing a connection through the datasources window. Ive tried establishing a connection to the database through both the database explorer and data sources window. No matter what I try I can not get that information accessed.
Im almost confident that this has to do with my processor being 64 bit.
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May 3, 2012
I have a table called Cashiers. In that table are three columns: the primary key, badge and pin.
The user inputs the badge number into, let's say, textbox1.
I want to locate that row and store the corresponding pin number into a variable called pinVar.
This way I can compare it to the input received when it's time for them to enter their pin.
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Apr 24, 2010
Is somebody having problems accessing a sql database in windows 7 64 bit?
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May 17, 2012
i started using VB 2008 recently (with perl background, its a big leap) and having a problem with database.i am trying to access a database that is attached to a different form. i managed to get my code to work if i was writing on the same form.example of code that will work just fine Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]...
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Jul 16, 2010
Im using vb.net and developed a project of payroll processing i need to access this project from another system which is connected via LAN by which everyone can use it, but i cant get it this is my connection string which im using .
Public con As New OleDbConnection("Provider=203.94.227.70;Data Source=path\pay.mdb")
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Dec 12, 2010
I'm having some issues with a game I've been writing for several years. It's an on/off project and recently I purchased a new computer and formatted my old computer so all of my installations of windows and visual basic 2005 (express edition) are fresh. I'm getting the following error:
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May 31, 2009
I want to create and populate populste several databases on my server MySQL. I pretty much know how to handle the data and queries once I have a connection, it is connecting that I don't know how to do. I have read all the help file I can find till I am sick of reading about "Northwind" which doesn't help me a t all. What I need are the three or four lines that establish a connection to MySQL at [URL] I need to be able to establish this connection transparent to the user who needs only to put thier user name and password for the site into a configuration file. Then I need to be able to create a database and give the user access with thier username and password. I know how to create the database but not how to set the username, password and permission.
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Jan 31, 2010
Is it possible to add, edit, view and delete records using a file only (instead of a database) and .Net 2005 (VB.Net/C#)? The concept is that a file that'll work more-or-less like a database. One can add, edit, view, delete and query data to and from the file. The file, either cannot be opened directly or data inside the file should be in some encrypted form so that even if the file is opened no one can comprehend it. Data inside the file can only be manipulated by a front end application i.e. .Net 2005.
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Feb 15, 2009
I have saved documents into my SQL Server 2005 database and they have been converted to bytes. My web page is made with VB.NET in Visual Studio 2008 with ASP.NET. The following is exactly what I need to achieve;
1. Allow user select document with a button
2. Select the document from the SQL Server table
3. Allow the user to download this document.
The error I am getting is that Category is set as Byte and it can't be passed through GetDocument because filePath is a String. I think that I am pulling the file path from the database wrong
[Dim Category As Byte() = NothingDim fs As FileStreamDim br As BinaryReaderDim document As Byte()Dim documentFilePath As String
Protected Sub ImageButton1_Click(ByVal sender As Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles ImageButton1.Click
myConnection = New SqlConnection("server=ORLA-PCSQLEXPRESS;database=Edpac;
[Code].....
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Aug 29, 2009
I installed Visual Studio 2008 and Office Enterprise 2007 in my new computer.I made some codes for a data reader to get data from an Access dabase. On the step where it will open the connection an exception appeared which says "Microsoft.Jet.Oledb.4.0 provider is not registered on the local machine".
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May 26, 2009
I've just started learning Visual Basic 2008 and I am stuck with accessing a database through VB, I am using the Data Source Configuration Wizard. Everything goes fine until I start debugging, there is no information in any of the fields. However if I use a different computer in the house I can look at different records.
[Code]...
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Apr 9, 2010
I have a problem with accessing a data file from Access database. Data Source configuration Wizard comes back with a dialoge box saying "Error Message: Could not load type 'Microsoft Visual Studio.DataDesign.SynDesigner.SyncFacade.SyncManger' from assembly
'MicrosoftVisualStudio.DataDesign.SynDesigner.DslPackage,version = 9.0.0.0, Culture = netural,PublicKeyToken=b03f5f7f11d50a3a
My computer is a Vista and it have known to have lots of problem, but not sure if this is one of it.
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Apr 30, 2011
I developed a small application which accesses a MS access database on my computer using VB.net. I developed the program on windows xp 32 bit. At the moment I am using windows 7 64 bit and the program simply will not run. I get a null reference exception when I try to do anything to the database. I have narrowed this down i THINK to the db provider. I was using Provider=Microsoft.Jet.OLEDB.4.0; and tried using Provider=Microsoft.ACE.OLEDB.12.0;. Neither seems to work. The path to my database is 100% correct. This is the error I am getting:
Null reference exception was unhandled.Object reference not set to an instance of an object.
Like I say the program runs fine on the windows xp machine. If it helps the access database file extension is mdb.
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Feb 17, 2010
I developed a project in VB.NET..In this project I want to use data from MySQL that is resides in my WEB Server.I can communicate with the MySQL server of my localhost but can not communicate with the WEB Server.In my CPanel I added Host from the Remote Database Access..But I can't communicate with WEB MySQL Server.
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Sep 16, 2011
I am trying to follow this userguide url... to basically build an application that will allow users to connect to my database, from an exe file. I'll try to explain as best i can. The plan is, users will launch an exe file that i have built in Visual Basic(VB) 2010 Express. When they launch the application they will see a 'login screen'.I am following the example guide (see link above), and will customise it once i can connect to the database. For some reason whenever i connect to the database it gives me two errors, the first is if i use the 'debug' mode in VB to test the script (note it doesn't produce any build errors), the second is if i build the application and run it as my users would.
1)Error Connecting to Database:Access denied for user 'mike'@'92.**.**.***' (using password:YES)
2)Error Connecting to Database:Unable to access any of the specified MySQL hosts..The ip address starred out (*) is my local machine ip address.The server is the server in which my Database runs on. 'mike' is a listed user on my 'user' table, the password i use is the password assigned to this user on my table.
3)I've rebuilt the whole VB project, but still no joy, wern't expecting it to as there were no errors generated.
4) I've read, but don't really understand that it could be something to do with my database not being able to be controlled remotely, only locally. I started digging into 'Access Your MySQL Server Remotely Over SSH', didn't really know if i was going completely off the mark, it didn't mention needing to do any of this in the guide i've been following, but just a thought. It might be the case as i've tried to access my database through a programme called MySQL Administrator. I punch in the host,username etc and connect to my database, for some reason it won't allow me to add new users, could this be because i can't control my database remotely? Would this stop what i'm trying to do working?
5) When trying to install the MySQL.Data.dll file i had great difficulty in choosing one and finding it, adding it to my project using the 'Add reference' in VB. Finnally got it how it should be (i think), installed MySQL.Data.dll Ver 6.1.2.0 into my project.
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Sep 3, 2009
code to access SQL Server database in connected and disconnected mode through ADO .Net.
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Jul 14, 2009
I have an issue with am access database source located on a remote computer.I tried using ADODB to access it, it works, but when I change( update insert or delete) the database on the remote computer, the changes is not reflected in my application
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Sep 24, 2011
I was reading from a book, and there's a way of creating database and accessing its tables using tools available in IDE. i-e DataSet, BindingSource, TableAdapter, BindingNavigator. Is this the correct way of using database or through the code??
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Aug 15, 2011
how to connect different vb applications to a database server.like accessing data from one database by different applications...
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Jul 7, 2009
I have made a front-end application in Visual Basic .NET that will store data entered by the user in a backend Access 2003 Database. The application has other functionality as well.If the user searchs for a previous record that has been stored in the Access Database, I query the Database (SELECT ... ) using an OLEDB Connection and then display the records on a Datagrid on my Form. Everything is working fine, however, the Column Headings of the Datagrid are the Field Names in my Database (FirstName, LastName,...) rather than Caption Values (First Name, Last Name,... )
I tried looking up the net, but most of the topics addressing a similar problems use DAO, and I understand that it is not completely supported in VB .NET. I am fairly new to VB .NET and I am not quite sure how to address the problem or where I am going wrong. I tried using FirstName.Caption but that gives a Runtime error (One or more parameters missing from the Sentence)
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Jul 20, 2008
how would I go about making the user access different local SQL databases. As in they use a GUI program to access / read / write data in a database but can also use that same GUI program to do the same to multiple database files.Is that sort of setup easy to integrate into a VB program? or does a VB program by nature only try to access one database? To integrate the open and close dialogs into a VB GUI in terms of different database files, is there much involved?
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Apr 25, 2012
I have 1 exe and 1 dll. The dll (ClassLibrary1) file is located in the root of a website. In the dll I have a UserControl that populates with data its controls, from a database that is on a website too. The end user gets the exe file. This exe loads the dll and displays the UserControl1 on the form. This is how i load the control from inside the dll (located on the web site), on my form (exe file).
Private _dll As String = "http://www.site.com/ClassLibrary1.dll"
Private _class As String = "ClassLibrary1.UserControl1"
Private WithEvents cont As UserControl
[code]....
The error is "Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed."Note that if i dont load the usercontrol from the web and instead have it locally, there is no problem. The data are fetched from the database (db is on the web) with no problem.The problem seems to be that the loaded assembly from the web (the usercontrol1 inside the dll) has no permission to access anything. I am not trying to access stuff from the user's pc (like file IO), but access a database located on a web server.
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Feb 3, 2010
I'm just getting started with VB.NET and SQL Server 2005. I have VS2008 installed on my machine. My SQL Server is in a domain that my machine is not a part of. Here's my code that I'm using to establish a connection:
Dim conn As New SqlConnection
conn.ConnectionString = "Server=SQLServer.hbug.lan;Initial Catalog=HUGRegistration;Trusted_Connection=True"
This code is part of a console app. that I'm using as a test. I'm just trying to set up a simple connection and then read data from the database. When I run this console app. in VS, the program hangs for a few seconds and then I get an error "SQLServerProvider has stopped working". My options are Debug or Close program. When I choose Close program, then an error pops up in my console window "Error: Unahandled Exception: System.NullReferenceException: Object reference not set to an instance of an object. I assume this error is spawning from not connecting to the database properly.
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Nov 27, 2009
im creating a program that will connect to a database (not local).That database will be access by everyone of my officemate for our data storage.The problem is the sample for creating a database is it make use of lacol database which can only be access by single user.how connect to a database later on after my deploying my application.
Scenario1:
interface program created: DONE
User input interface created: DONE
Database created(but not yet connected to the actual application): DONE
Scenario 2:
Program Deployed :DONE
Scenario3:how can i connect to the Database i created with program i just publish/deployed?
something like that i have a command button then it will open a dialog to locate an existing database then connect to that database (ms access database or sql database created in - creating database sample).
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Jul 17, 2010
i want my software to share one database on a network
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