DB/Reporting :: Access Connection Strings?
Sep 12, 2011
I have been struggling with the construction of an Access connection string. Here's the problem.My Visual Basic 2008 project is located in a disk partition on my hard drive that I have named S:. My Access MDB file is in the same location.When I deploy the application it obviously will not be in an S: drive on the user's machine. My concern is that if I construct the Connection String using the file designations on my computer as:
(Provider =Microsoft.Jet.OLEDB.4.0; Data Source =S:MyApplicationmydatabase.mdb; User Id =admin; Password =
The deployed application won't know where to look for the data file. I know there are some shortcuts that will allow me to construct the connection string, but I do not know either the designated names or where to find them.
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Jun 9, 2009
I have finished my program and now i am ready to deploy it. The only problem is it is a multi-user application. All i want to do is simply run the program with the database from a server, and have other local computers with the program access this same database. I know that you have to change the connection strings for the local computers, but how can i go along doing this?
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Jun 1, 2012
[i][b]I have always developed apps for desktops with an access database on one server for one company or sql server. I had one connection string. Now I am in a situation with multiple clients using my software on their own server. This means different connection strings can anyone suggest an efficient way to do this without changing connection strings for each server throughout the application?[/b][/i]
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Jul 8, 2010
I've created a small DLL, an addin for Autodesk Inventor, this addin saves some information provided by the user and the program to an access(mdb)database.The whole idea behind this is that it allows users to quickly find drawings, assemblies and so on.The DLL works great on x86 systems however it has issues on x64 because I used ado.net.In a attempt to solve it I forced .net to compile it with the target x86 CPU settings.
However using this I'm unable register the dll (C:WINDOWSMicrosoft.NETFramework64v2.0.50727RegAsm.exe /codebase SavetoDatabase.dll )It says its not a proper .net dll file and therefore cannot be registered.
is there any other access-database connection provider (like dao or ado.net) that works on a 64 bit machine? Or do I need to change from mdb databases to another type (like mysql)? because sooner or later all machines its running on will be converted to x64.Or do I need to register the dll in another way?I've also tried to replace the conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0 with ACE, with no luck however
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Aug 20, 2010
I have several programs I have written for my music studio/production company. Many dealing with inventory, customer DB etc. All of my programs are in VB6 and I have started to convert them all to VB.NET. I am getting proficient with VB.NET and connecting to DB using the very simple and generic connection strings, Example:
dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = C:/develop/Customer Tracking/resource.mdb"
con.ConnectionString = dbProvider & dbSource
[Code]....
As you can see I am using a basic MSAccess DB and I want to get away from this and start using SQLExpress,
connect to a standard SQLExpress DB? (when I loaded SQLExpress I took the defaults...)
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Oct 28, 2011
What is a dynamic MS Office Connection string? I have realized that each each version of MS Access has a unique Connection String. Now my concern is that if I use MS Access 2007, for example, it may haave compatibility/connection problems if an application is deployed in a machine with a different edition of MS Access. Is my understanding correct? If so, how to go around this hiccup?
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Mar 19, 2012
I'm creating a program in VB.Net that heavily interacts with 2 large MSSQL databases. I do not know a ton of vb and I'm fairly new, but I would assume just having the connection strings in the code and releasing the program it would be quite easy for someone to reverse the program and get my connection info? correct me if I'm wrong. My question is I'm wondering if there is a safer way to use a connection string in my program. Would I just have to encrypt my app? Create a module or dll?
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May 2, 2010
I have read and worked through all of the examples in the book "ADO.NET 2.O", but there is so much there with so many ways to handle data, I am having difficulty translating the examples into my own real life application. I am confused about creating runtime connection strings, connection strings in my app.config file, connection strings in the properties for a sql connection control, etc.
I have a midichildform with a datagridview control, and I use a table adapter to edit and update the SQL Server 2005 Express edition database. There is no problem there. However, I also have a button control that I want to use to "process" the data that has been updated with the table adapter. I want to open the updated table, read each record on at a time, manipulate the data and add a records to another table. Do I have to create a connection string and an oleDBconnection? Or can I somehow use the connection string that is in my app.config file? [Code]
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Oct 3, 2010
I need a bit of advice. I would like to store secure connection strings somewhere safe in vb.net. How can I build the secure connection strings in what situation and what would be the best?
As I have done the little research and found that the secure connection strings would be encrypted the strings and input the strings in app.config, so I would have to make a change in the app.config[code]...
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Sep 2, 2010
I have two executables that access a DLL containing Data Access Layer objects Each exe can have a different config containing info on server and database name, connection string etc.How do I pass the config info to the DAL objects?
Obviously I can pass the config strings to the DAL objects every time I instanciate one, but that seems messy and repetitive as every class in the DAL will require Properties for the Config strings..if there is a way for the instanciated DAL objects to read some properties from the calling object without me having to pass them explicitly?
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Nov 24, 2009
We decided to use the registry for handling our deployment with connection strings in our VB.net application.
The requirements are:
If the program cannot connect to the server, first check the registry for a connection string. IF not, create the folder and fill in the name, type, and data. Make sure its encrypted.
I have never edited or created anything in the registry.
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May 26, 2011
I've just started ASP.NET for real, and I was wondering if it is possible to use connection strings from Data Sources instead of hard-coding them. I've added my connection in Data Sources and it works, and I can also drag a table to a page in design mode, but I can't figure out how to access it in code. Here's what I get when I drag it in:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource1"
EmptyDataText="There are no data records to display.">[code].....
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May 21, 2010
In the past I've used a Singleton Pattern to load the connection string when the application starts via the global.asa file.
I have a project now where each user has a unique connection string to the database. I would like to load this connection string once. The issue is that the singleton pattern will not work for me since each user has there own connection string. Basically the connection string is created dynamically.
I do not want to store it is session. If anyway has a clever way of doing this in .NET let me know ?
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Oct 24, 2011
How can I call the connection string by name from an app.config file in my vb.net program?
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Dec 4, 2009
I'm having trouble accessing the connection string from the app.config file. my connection string is:
Dim sConnect As String = "Data Source=.SQLEXPRESS;AttachDbFilename=G:VB Level 1ProjectContactsDB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
I using this string in a few different places, but I want to access it from the App.Config file. I've been at it for awhile and can't get it working.
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Jul 1, 2010
from [url] they write this:
This example includes a password to demonstrate how DbConnectionStringBuilder works with connection strings. In your applications, we recommend that you use Windows Authentication. If you must use a password, do not include a hard-coded password in your application.but if we do not hard-code the password then does it mean that we are supposed to retrieve the password from some other place? so is it correct to say that we should save the password in a file and then retrieve it when the app runs?
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Nov 11, 2010
I am using VB 2008 & MS Access 2007 Databases for my Windows Forms Applications.The Problem is my Connection strings have been disappeared from DataSource Configuration Wizards & now i am unable to edit any Connection String in DataSet Designer.I had tried to create a Macro in MS Access Data File but didn't know how to create & so desided not to save any & just quit from Access and came back to Visual studio. Since then only this prob. has started. Earlier to this everything was just fine.I have tried to uninstall MS Office as well as Visual Studio then Re-installed Visual Studio but the problem is still there.
1] Error while trying to Reconfigure Data Adapter in Dataset
2] Disappeared options & Empty Connection Combo Box
3] Add Connection DialogBox with no DataSource property line in the Grid control
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Sep 9, 2011
I have a situation where I have a vb.net program that uses two connection strings. This program will be used on multiple web servers on multiple domains and the only difference for any of them is the two connection strings.What would be the best solution to read in these connection strings from a file separate from my actual .vb code?
Ideally I want to be able to drop the .vb and the connection string file into its own folder on any number of asp.net websites and not update anything else (for example add any connections to the web.config or anything) than the external file containing the connection strings, I assume something like xml would suffice?
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Oct 3, 2010
I would like to store secure connection strings somewhere safe in vb.net. How can I build the secure connection strings in what situation and what would be the best??
As I have done the little research and found that the secure connection strings would be encrypted the strings and input the strings in app.config, so I would have to make a change in the app.config
To change from this unprotected app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
[Code]....
The code have been built to a guy who known as Nick J. Fessel. I am not too sure if it very secure to use it so. Do anyone know that if the connection strings is secure or not?
info for the secure connection strings without being found out
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Jul 14, 2009
I have upgraded my VB app from VB to VB.NET and its working fine. Now, I want to convert my existing DB connection strings from ADODB to ADO.NET so that I dont have to use MS Access on every client which runs this app. Currently the VB app looks up into an Access db to get the server ip, username, password etc. I aim to hardcode these values so that I wouldn't need the Access db anymore. Any inputs on how this could be done?
[Code]...
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Apr 11, 2008
i know this question was asked a couple of years ago by TheMinistered .. but i cannot find an answer, and i have exaclty the same problem (using both VB6 and VB.net 2003) :
When I attempt to connect to a remote SQL server via ADO it takes almost 20-30 seconds before Open returns. I don't know if it's something I'm doing wrong... here is my connection string/code:
Private Sub Class_Initialize()
Dim strConnectionString As String
Set m_objConnection = New Connection
[Code]......
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Jul 23, 2008
I have created a very simple Visual Studio .net 2002 VB# program. It consists of form1 containing a DataGrid bound to an Access 2007 Database using OleDbConnection1, OleDbDataAdapter1 and DataSet11.The location address of the Database will change based on the user so, I need to make the connection string variable. Problem is inserting the following string variable "source=" & strFileLocation & ";" creates a fatal error
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May 31, 2009
I have a little problem with checking if a sql connection is good.
Attached here i have a simple vb.net program that should check if the sql connection to the sql server is good. If i just run it once it works very well. But if i use it in a timer and check the connection to the sql server every 10sec it will only tell me that the connection is good (V=0).
I have tested the code with turning of the sql server service.
Dim connect As String = "Server=192.168.1.2;Database=Test;User ID=sa;Password=12345;Trusted_Connection=False"
Dim sqlconnection As New System.Data.SqlClient.SqlConnection(connect)
[Code].....
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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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Feb 17, 2009
I have a problem with the connection to my database. It's on a remote server, and this is my code:
[Code]....
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May 14, 2010
I'm connecting a MS-SQL remotely with VB2008 Express.I defined two different methods - the first one is copied from my old VB6 application, which is working perfectly.In this application, the retrieved data is added to a listview control, not datagrid!
Code:
Dim myconn As ADODB.Connection
Dim MyRecSet As ADODB.Recordset
myconn = New ADODB.Connection
[code]....
The SQL query contain several table, thus I used a "*" instead for the table name- not sure this is correct?
Code:
da.Fill(ds,"*")
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Dec 28, 2010
In our application we use IDataReader which actually call function from one.dll where weExecureDataReader()
We have many calls in application and in some places For some reason I am getting error message "DataReader already open" but I am not sure where.What will happend if I simple close that conection in the that .dll? Am I going to make trouble to database because one datareader left opened? I assume closing connection will close reader too and gargage collector will manage that left opened datareader..
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Aug 8, 2009
I am trying to use RAP (rabid application development). So I have created a database with a datagridview to show all information and textboxes to modify the informations. So far so good.
The problem is created when I try to use the search facility on the datagridview. The search is working but the problem is that the textboxes are not following the search criteria . I can configure this manual but I would like to know which is the easier way to configure the textboxes to show the value of my search criteria.
I also want to know how when I finished with the search criteria and empty the search the text boxes to make the connections back as they were before.
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Sep 24, 2009
I have just written an application for myself and a few other users to use .rdp to connect to a number of servers, by clicking on the appropriate button. In the full version of the program I have two sets of connections one for when we are inside our vpn, which uses local ip addresses and DNS names; and the other which uses the external IP addresses and DNS names.This works quite well; if the user has stored credentials on their pc for the connection they connect straightaway; and if they don't the .rdp dialogue opens up with the server name/address filled in, ready for them to edit the rest of the required information.The problem for me is that this means I have to code 43 different Private Subs and then link the buttons; and I was hoping that instead of individually coding each connection, I could get the users to:Select by an option button whether the connection was internal or external
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Dec 16, 2011
SQL connections confuse me sometimes In almost every SQL related code on the internet the routine is like this;
* Open connection
* Execute SQL command
* Close connection
Is it good practice to just open a connection when the application starts and use that connection until the application closes?I know that sequential connections are required when processing more queries, but what if I need to poll a certain Table every x seconds? Isn't is better to keep that single connection open for as long as the application is running (and re-open when a failure occurs) instead of opening a new connection every x seconds?
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