VB 2008 With MsAccess Connection On Multiple Forms?
Aug 6, 2011
I have a VB Solution with a dozen forms trying to implement invoice system.My main form (Say Form1) only has a design to create , Edit or Delete Customers.My form 2 will be opened if Create button is clicked. In my form 2, I have textboxes where user can enter Customer details and click on SAVE. My doubt is here....On clicking this SAVE button in Form 2, I want a INSERT command to happen on the MSAccess's Database table called Customer (which I have already created... this table does not have any records as of now). In my form 1, I added a MSAccess Database with a Connection String. In my Form1's code I have code like this[code]...I got this piece of code from this link [1]: vb.net - sharing mdb access connection among multiple forms/Now, I do not know what more code does this require to INSERT records from my text box into the Customer table's fields.
I am developing a program and stuck up with an issue. I am able to enter single value in MSAccess database however, when I create a programe to enter multiple entries I am getting an error. developing a code to enter multiple entries in MSAccess 2002 db with the help of VB based form?
I Following code I am using for single entry:
Private Sub Button1_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Enter Dim query As String
I'm testing database programming in vb.NET 2008 at the moment and try to find a way to use a database connection in different forms, so e.g. I put the the database-connection-component into one of the forms. I know, I could access it by e.g. form1.databaseconnection.xxx, but is this the best way or can I "put" the connection into something more abstract which all forms know about?
I'm starting to put in a database into my application, however I'm drawing a blank on how to share a database connection among the dozen or so different forms in my MDI application. I'm assuming this has to do with interfaces or something but I can't find any relevant examples anywhere. Can someone help me out? Ideally what I'd like is when the app is loaded up there is a call to a function in the forms loading area which establishes a single connection to the mdb, that I can then call via any form so I don't always have to open/close connections everytime I need to update the db?
Here's a basic example of the mdb database access code I've got working:
Dim dt As DataTable = New DataTable() Dim OleDbTran As OleDbTransaction = Nothing Using connJET As OleDbConnection = New OleDbConnection("connection string here...")
I have already connected my database and have completed multiple forms and reports.Just discovered that I missed adding ONE field in an Access table.Since it is attached how can I add a field to the database without disconnecting it? If I do disconnect it and reconnect will I have to redesign all my forms and reports?
I want to compress an ms access database using vb.net. If the database is open this fails. How can I close the database, compress it, then reopen the database using vb.net code to accomplish this. I've already successfully written the code for compression, but I can't find anything on closing the database while leaving ms access open.
I am creating an VB 2008 application which uses 2 connections strings in according in which computer is running (my test machine, and the production server). How should i manage the connection string in order not to change manually the connections string which are many inside the code??
I have read that you can read them from an external line, or if you put both connection strings in an external file, according in which machine the program is running can actually the correct string?
Im very new to programming all together, but Ive recently been messing around with Visual Basic 2008..
1. When using multiple forms, how do I make a form be the form that opens with the program (default form?)?
2. How do I assign a button to open a second form?
With what I'm trying to make, I have both forms ready, I just need form2 to be the one that is the first to open when running and I need the code for a button to open form1.
I'm trying to make a string inputted on a separate form's text box adjust the value of a string on another form. Is there a way to do this rather than exporting the data to a file and retrieving it on the other form?
So, I'm trying to do things according to accepted convention as much as possible.
I have a DataTable that holds data that is read in from an XML at the launch of the program. This DT contains data about folders that are added by the user. It is primarily accessed by a single form, but another form used for Adding/Editing folder data will need to update it.
So, what is the best way to handle this: Currently the DT is created/maintained in the main form (FolderPad) that uses it. Would it be better to put the DT in a public Module for access, or allow the add/edit form to access the reference to it in FolderPad? Or is there a more accepted way to do something like this?
I have used CSV files before for a simple database of about 12,000 items - this was a simple one page form... Now I want to have the same database but with the data available to multiple forms at the same time.. eg.. Form 1 displaying persons 1,2,3,5,7 name, addy, phone etc and form 2 pulling info for persons 2,3,4,8... Is this possible with CSV files?? or even XML?... The only other thing is that I do it all in .NET 2.0....
I am trying to display(in a status strip label) the user name of a user that is currently logged in across multiple forms. The initial form is a log in screen that queries an SQL database for the user name,password,and user type. If the query returns a match,then a different form is displayed based on the user type. How do I retain the user name of the user that is currently logged and display it in the label? BTW,it's a point of sale program.
with access 07 + vb.net...i am calling an access Query ....the Query which uses a user defined PUBLIC function in access module...the problem is i am getting an error as "Undefined function 'DecideSON' in expression." in fact DecideSON is a function in the access database module?
I am trying to export the contents of Array to Microsoft Access table. But as of now i could do it via creating a text file in the local HDD. I would like to find a solution bypassing this step.
How can i use the ProductID to compare and call out the corresponding Product Name and Selling Price column from the MsAccess Database and display in the second DGV?
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
I have the requirement to create an application that has multiple front ends developed using Windows Forms, WPF, ASP and Compact Framework Mobile Forms.I would like to be able to create a series of obejct representing the business logic and have this logic accessible from the various front ends available. My first thought was to use remoting as I'd like to be able to pass the business objects back and forth between client and server but the compact framework doesn't support remoting and also transferring a full framework business object to a compact framework business object doesn't seem possible.My next thought was to use web services but again the passing of business objects seems to be very hard to accomplish. Without doing this I would have to create individual web methods for each business operation.
Finally my next option is to use sockets and write the whole client/server logic within some classes and expose them to the UI/Business layer. My only problem with this is it is not scaleable should the number of clients increase dramatically whereas using remoting or web services I can host the solution via ASP.Net.Does anybody have an ideas on the best way forward for this or even have any input on how they would write an application that required a windows form, wpf, asp website and mobile device GUI all of which want to use the same business logic?
I have googled high and low to find an answer to this but I must be searching wrong.I have an application which has a listview displaying some items that are stored in a SQL Compact database. I am using a second form to add new items to this list directly into the database.When the second form closes I want to call the sub in my first form to refresh the list from the database.
How can I get it to fire the form1 sub routine on the close event of form2
i was doing a fair amount of programming many years ago, like 10 it feels like, so I'm sorely not up to date on how my newly downloaded Visual Basic Express expects me to communicate with it.I am writing a program that pulls a cell from a database after the user has gone through several forms to determine which cells they want. When I write it like that, it doesn't sound very efficient, but I've designed it this way for usability.Here's where I have a problem: Should I store the path the user takes in a string, an array, what?
Here's an example:Someone wants baseball stats and trivia. They run my program, main form pops up, they select National League button, the NL Form pops up. Now the way my program is set up right now, is there are two ListBoxes on the form, one is populated, and as the user selects a Team from ListBox1, it jumps to ListBox2. Once they've selected all the teams they want info for, they click a button Next.
What I now need the program to do is show the next form "Team: name" once for each team, and insert the name of the team on the form in the appropriate label which I'll have blank. This form will also do the Listbox thing except the first listbox will populated with Topics like HR Stats, Pitching Stats, Coach History, etc.
I have a vb.net web app and I am passing a SQL connection and a transaction to a method which writes a single record to the database.
I would like to start and commit a transaction for each record that is written but using the same sql connection until the loop is done.
One method I saw was utilizing a using statement but it didn't work for me.it runs the first time and gives an error on the second that the transaction has already been commited
Using sqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("ConnectionString").ConnectionString)
I am using datareader to retrieve data. I want to use multiple datareader at a time with same connections. WHen i used it, it gives an error as connection should be closed before using it next time.
Launch a dialogue window from the main form, and then another dialogue window from that dialogue window. If you close the second dialogue window and call dispose the main form vanishes under any other open windows. This doesn't happen by closing a dialogue window normally, but I am attempting (rightly or wrongly) to stop memory useage creeping up by disposing of it.
So, the question is - what method can be employed to maintain the position of the windows?
I have two forms frmMain and frmNew, and one module modMain. In modMain I hold public variables which are needed for application. My question is how to open and close those two forms when needed? I ask this because if i set frmMain as startup form, then when closed, application will end, and one of those two forms will always be displayed. Also if I set frmNew as startup form, then when I close this form, application will also end. Is there a way to do this from module or something so my application won't end after closing and opening any of those two forms?
VB.NET newbie here... I have an vb.net windows application set up. It has multiple forms, about 6 in all. There's a main menu form, and then 5 other forms to collect data. The user will collect data on each form and bounce back and forth between forms. How do I get the forms to retain the data that has been entered into the text boxes and/or other controls on the forms? For example, they might fill out a few textboxes on a form, but then need to go to a different form and fill something out... and then back to the previous form. Right now, when they come back to the form, all the data previously entered in to the text boxes is gone.
I am trying to write code with multiple forms. The first screen is splash screen then is supposed to close and have a calculations screen. In the timer of the splash screen I wrote the following code
Option Explicit On Option Strict On Public Class uiHinsbrookSplashScreen
[code]....
This opens the second screen, but when I Hit Exit on the Second Screen The first screen is still open. What do I need to do next?
is there a function that will allow coders to connect to multiple database? by just changing the connection string and not the variable declaration ...example:connecting to access is something like this
Dim Con As New System.Data.OleDb.OleDbConnection(ConString)
for sql is something like this
Dim Con As New System.Data.SqlClient.SqlConnection(ConString)
is it possible? acctually in vb 6.0 it is possible ...
