I am developing a database driven application and need to access the database often. What is the standard/best practice for storing the database connection. Do i need to create a public static variable? The main thing i was to avoid is passing the sqlconnection as a parameter in almost all of my function calls.
View 1 RepliesAfter 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]...
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?
View 7 RepliesI'm stuck regarding to grab connection from app.config file...i'm surf many type and kind to do it..but still can',t.....i need to connect into two database (oracle n firebird).
View 2 RepliesI am working on a VB.net winform application which makes extensive us of a mssql database. For the most part (almost exclusively), I have used the Visual Studio dataset for accessing the data. This means that the connection string was created as a program setting, and is saved in the app.config file. The problem that I have, is that I need to move this connection string to the system registry because it has been deemed by the powers that be that a config file is not secure enough.
I think that I can figure out how to access a registry key, and I know that I can save the string to a registry key, but the problem that I am running into is that I don't access the connection key in the code anywhere to easily swap out the registry key for the existing program setting. When VS creates the connection and dataset, where is the connection string referenced? Is there a simple way to swap these out? is it possible even to just reference the registry key in the setting so that I don't have to find where the setting is used and switch it out?
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 ?
I am working asp.net for a few years. In asp.net, database connection string is stored at web.config file. All page can share this connection string. Now, I need to learn how to create windows app. Where to store a connection string, e.g. connect to SQL, to Access DB, so that all windows forms can share it?
View 5 RepliesI just want to know what is your suggestion about storing database connection strings in .NET? I am using My.Setting usually, but now I am facing with versioning of my application. When I upgrade my application to higher version the value in My.Setting has been changed, it didn't remain as user has set before, but changed base on my machine's setting. eg. the value in My.Settings Version 1.0.0.0 (User's computer) is 'ABC' When I develop again some new feature on my machine and set its version to 1.0.0.2, of course the connection string in my computer's My.Setting file is different with User's computer's My.Setting. So when I copied my recent updated file to use's computer, then run the application, the application read the new My.Setting file from my computer but not from their computer. the value in My.Settings Version 1.0.0.2 (Developer's computer) is 'DEF' Therefore I have to reset and reset their connection strings onve I updated their application, that's too annoying?
View 16 RepliesIn my application I have many different forms each use 3 different database. And right now I am placing the connection string in each form but when it is need to change I have to change in every form. Now what I want to store all connection string in a vb class and call them in every form. So that if I need to change I can do in that class. I have stored my connection string in database so even I don't want to connect to database again and again. I have some idea in which maybe a public class is used and some how I will call it on other forms.
View 2 RepliesThis emailing code wont seem to work in my program. I get an exception "The SMTP server requires a secure connection or the client was not authenticated. The server response was 5.5.1 authentication required."
Imports System.Net.Mail
Public Class emailStudent
Private Sub sendEmailButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles sendEmailButton.Click
SendMail()
[code]....
I have simple code that connects to Sql database... (well it doesn't)
VB
Dim objConn As New SqlConnection("Server=localhost;uid=***;pwd=***;database=***")
objConn.Open()
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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)But looks like something is wrong with "localhost" thing. Any help? Where can I get name of (my) server?
I need to know what is the common way to store a SQL server connection string for an application in VB.NET.How do I read app.config values How to do it in ASP How do I store a connectionstring (unencrypted thus unsafe)It's quite frustrating not to find a decent and full answer on how to store a connection string in VB.NET in app.config (or settings.settings if it's better) safely. At the moment it's hardcoded and so it is immobile and in plain text.
View 2 RepliesI am tring to make the below application work with SQL Server 2005 Database Currently it works for test.mdb, which is in the same folder with the application. How shoud I modify the MapPath to work with SQL Server.
[Code]...
i m using Microsoft VS 2008 and in that VB.NET as the language the problem is i m not able to store connection string every time machine changes have to keep on changing the connection string
View 7 RepliesI want to ask that where to store connection string in VB.Net.AS in ASP.net we can store connection string in web.config file and access it in the foll. way [code]In VB.net where to store conn. string on form_Load or any other place???
View 1 RepliesI am storing my connection string in my app.config file. I am using sql server express 2005. The connection string on my dev machine is different from the ones at the clients. so each time I update I open the config file and edit the connection string setting. This is quite a pain.also I have now published my app to an ftp folder so that the clients can get the updates each time I make changes. saves me the hassle of going to them each time i update. so now i need it to be so that I won't have to change the setting all the time.Would the best way be to store the connection string in a settings table in the database?
View 6 RepliesI'm creating window application with VB.NET and flatfiles.the problem is how do i store the connection string in the app.config file that include the application.startup path?
<add name="cn" connectionString="provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application.StartupPath + "data;Extended Properties=text;" />
i got some error when writing to app.config.
"Missing attribute value on attribute 'Application.StartupPath'."
I am coding a program that will allow the user to input 5 payrolls for Store 1, Store 2, and Store 3. The total of the 5 payrolls are then added together and shown in the respective Store's labels. A total label is also there to add up all the totals into one number. The numbers in the label must be in currency form. My problem is the numbers don't add correctly when I hit calculate. The first two numbers add together, but then after that the number just seems to subtract a random amount.
So far I have this --
Public Class Form1
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Me.Close()
End Sub
[CODE[...
I am trying to do something fairly simple.. allow my user to import thier data from Excel into SQL Server, where it can be used by the application.To do this, I'm using the fairly simple code that is common everywhere I look:
strFilePath = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fdlgFileOpen.FileName + ";Extended Properties=Excel 8.0"
connExcel = New OleDbConnection(strFilePath)
connExcel.Open()
[Code]...
Now, on my development computer this code works perfectly. The data imports, and I can go on my merry way.
On the TEST computer, this code throws the error: "ODBC -- Connection to {SQL Server} servernamesqlservername failed." This seems very odd to me, because I'm using exactly the same SQL Server and database to interact with the application, and all the other screens in the application work perfectly. The test computer CAN connect to this SQL Server, but it keeps throwing this error whenever I try import data from Excel.I've tried everything I can think of - using the server's IP address instead of the server name, sending the SQL Server administrator data along with the request, taking out the Trusted_Connection=Yes... nothing works. What is going on here? How can this code work fine on my computer, and hiccup on another?
We want to store session in SQL Server. We have sessionState mode="SQLServer". I have been given a sample connectionstring as listed below. In this it is having both stateConnectionString and sqlConnectionString. Why do we need stateConnectionString when mode="SQLServer"?
<sessionState mode="SQLServer"
cookieless="false" timeout="20"
stateConnectionString="tcpip=XXX.XX.XXX.XXX:42424"
sqlConnectionString="data source=XXX-FFFF-sql2k8,2025;
[code]....
Note 1: SQLServer mode stores session state in a SQL Server database. Using this mode ensures that session state is preserved if the Web application is restarted and also makes session state available to multiple Web servers in a Web farm. To use SQLServer mode, you must first be sure the ASP.NET session state database is installed on SQL Server. You can install the ASP.NET session state database using the Aspnet_regsql.exe tool
Note 2: StateServer mode stores session state in a process, referred to as the ASP.NET state service, that is separate from the ASP.NET worker process or IIS application pool. To use StateServer mode, you must first be sure the ASP.NET state service is running on the server used for the session store. To use StateServer mode in a Web farm, you must have the same encryption keys specified in the machineKey element of your Web configuration for all applications that are part of the Web farm.
Here is my code:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim myfilelocation As String = "C:myPicturesmyimage.png"[code]...
Since the application is storing in database, how can I retrieve that code into the vb.net because I can't see it in database? You can see the image is getting its path location from my machine as local so I want to either put it somewhere where other computers in workgroup can able to get the images or how to tell other computers to store the image in my machine and to retrieve it from here.
Is it possible to code to copy store procedures from one SQL server to another SQL server in vb.net application without using SQL server replication?
View 3 RepliesAt the moment I am using Access & an OleDb connection to store data. I went down this route originally because I though that this was the best way for applications that I am distributing to my clients.
I would prefer to use something like SQL Server but is this a good idea for software I am distributing? Does the average Joe's PC have SQL Server pre-installed? If not, I suppose I can provide them with a link to download it for free?
Is there any better alternatives to Access / SQL Server?
Your code works perfectly well. how to store and retrieve image from a database(sql) using vb.net
View 1 Repliesi looking for a easy way to save a image to a sql server i have found a lot of examples but many is for asp.net and others have many functions for do a simple process that with vb6 i do with a few lines:
[Code]...
but this simple dont update nothing i have tryed to update a text value but the result is the same nothing is updated! but he actully dont return any error and i can see that the record is opened but simple can't update
So I know it's possible to store Users and Roles on SQL server but I was wondering if it was also possible to store the access rules on SQL Server. I've searched but I can't find anything.
Our auditor requires us to run reports that tell us which users have access to which websites. Currently I am parsing each web.config file to see which users/roles have access, storing that in SQL server and running a report off of that but I am hoping there is a better way.
I have a jpeg file in my C drive from my vb.net application I want to binary read it and store it in SQL server.
View 1 Repliesi am working on a web site. i need to validate a text box value with a Column ( in table A, using sql server) .
well, the situation is. When user enter in textbox1 = 45 , before user go to textbox2 , textbox1 check in database if 45 is there. If not give error .
How to store and retrieve images from VB.NET and Sql Server 2008
View 9 RepliesSQL Server supports the ability for clients to store objects within tables.Create Field that data type Image and Initialize byte array with a null value initially.Use FileInfo object to get file size.Open FileStream to read file.Use
View 2 Replies