"Pulling" Data From ACCDB?
May 17, 2011
I am building a VB.NET frontend to access an ACCDB backend built with Access 2007/2010. The backend will be on a share and accessed simultaneously by multiple users (5 max for the time being, maybe a dozen or more eventually?).My question is, what is the best way to pull the data for the fastest possible acquisition, manipulation, and updating? I'm thinking that pulling it in, then severing the connection and running all of my queries against in-memory structures would be best; am I wrong in this line of thinking?
Do the "DataRow" objects (e.g. "TicketsRow") maintain a connection to the database? I started in on building custom classes to store the data in memory which would pull from DataRows and then dispose of them, but wasn't sure if this was the best approach. My Access frontend was horrendously slow, which is part of the reason I migrated to .NET. I'm not convinced the app itself was the problem, but this solution should give me far more granular control over how the data is accessed and stored, besides the fact that VB.NET seems orders of magnitude more powerful than VBA.
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May 7, 2012
How to display data from the database (records) in a vb.net application without a datagrid (i.e in textboxes, and labels) ??
I have used "Add data source and connected my database and also associated the data bindings" but still it doesn't work.
I will attach an image to depict what functionality i'm basically looking for..
[URL]
I want to populate the highlighted controls from a database.
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Jul 6, 2009
I'm trying to pull data from a PDF to run calculations.What would be the best way to approach this?
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Jun 9, 2010
here's what I'm doing. I'm putting together a program that will allow employees that work under me to all submit shift reports in the same format instead of getting multiple different formatted text files.
I have a list box that they add "actions" they've performed throughout the day. It's populated by a combo box and some text boxes.I've got it all functioning minus one aspect...
[Code]...
Here's my problem... it's only outputting the FIRST set of items. The "Upgraded" accounts all list but the "Downgraded" and "Canceled" are not there.In a perfect world, I wouldn't ever need to worry about "Canceled" or "Downgraded" but... the world isn't perfect so,
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Feb 24, 2009
I have a table in my SQL DB that contains :- ID- Date From- Date ToI then have a SQL function that pulls out the Start Date (See code below)
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Jul 21, 2009
database name = DataTable
Pulling data from Access database in .net?
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Apr 6, 2011
I am trying to pull wind direction, temperature and speed, data from this webpage, I have had not much success with it at all, I think that I have the correct method but get stuck on the HTML coding. the webpage is: [URL] I sort of know how to get to the HTML code, but get lost on how to define the ellements that are required. I have a screen capture of where I get up to.
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Apr 19, 2012
Question: How do I programmatically determine which provider to use (Microsoft.Jet.OLEDB.4.0 vs Microsoft.ACE.OLEDB.12.0) when my app runs as a 32-bit process on a machine with Office x64 installed?
I'm developing a VB.net WinForms app in VS 2010 and targeting both x86 and x64.The app processes data from xls, xlsx, mdb and accdb files using System.Data.OleDb:Dim oConn As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=...")
The x64 version of the program works as expected. The x86 version works as expected on a system with Office x86.When I run the x86 version on a machine with Office 2010 x64, I get the following exception when trying to open a connection:
The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.I believe this is because I'm running Office 2010 x64 so the x86 data access components are not installed.I can get it to work for Office 2003 files (*.mdb and *.xls) by changing the provider to Microsoft.Jet.OLEDB.4.0.
How do I figure out which provider to use when running as a 32-bit process on a machine with Office x64 installed?Ideally, I'd like a function:If ProviderIsAvailableFor("Microsoft.ACE.OLEDB.12.0") Then
Else If ProviderIsAvailableFor("Microsoft.JET.OLEDB.4.0") Then
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Jan 16, 2012
This is in ASP.net iwth VB.I have a quiz project that I've been assigned for work.This quiz project contains two main SQL Databases it pulls the info from. First is a Quiz table, which contains three columns: QuizID (Pri Key), Title, Description. This is where I declare the quizzes, indicated by the QuizID (1, 2, 3....etc)
The second table is the Questions table, containing the following columns: QuestionsID (Pri Key), Title, Answer1, Answer2, Answer3, Answer4, Answer5, CorrectAnswer, QuestionOrder, QuizID....The QuizID in the Quesitons table matches the QuizID in the Quiz table.Thus for QuizID = 1, it consists of all the questions with the matching QuizID in the Questions table. The CorrectAnswer I want to assign a simple value (1, 2, 3...etc).I need a way to take a set of questions (based on the QuizID) put them in some sort of table and randomize them (or rather shuffle them) so that each time this quiz is taken, it pulls all questions randomly, but not repeating any)...I then want the code to pull the question and coorepsonding answers to pick from in a radiobuttonlist. However, It only needs to pull the number of answers. Example, a True/False will only have Answer1 and Answer2. The other Answers will have the NULL value in it.
There needs to then be a way to go through each one of these questions that have been placed in the table (in that random order) using a "next" button. When a question and possible answwers are displayed, I alaready have code to keep the answers in the session to grade it at the end (using correctAnswer and selected answer.I have no specific way to bind the data to the Database. I have used SQLDataSource to make other connections before, but I don't know if this is the best way.
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Jul 21, 2009
I was wondering which way would be the easiest in VS2005 to connect to and pull data from a MS SQL database. I have already setup the database connection by choosing the datasource for a DataGridView but I'm not able to retreive any information.
The steps I have taken so far:
1. Make new form
2. Drag and drop DataGridView onto the form
3. Setup the data source and respective username password
Not sure where to go from here....
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Feb 5, 2010
I am trying to insert data into two lables from an access database(2 different tables) by doing a search. I have code that wont work
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim SearchPatient As String = txtNPatientID.Text
[Code].....
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Sep 11, 2009
I just got put on a new project to design an app that will retrieve data from an excel data sheet that holds information from our VoIP server's call log. Conveniently, this call log is stored in a fixed location on the local drive that this app will be running on. After working on this for a bit, I knew right away I'm going to need someone smarter than I am...I got to the point where I can show data but heres the issue : Every time I am retrieving the date it shows it as, "08/27/2009 12:00:00 AM", how do i remove the unrelated time stamp? Here is my code in Visual Basic 2008 Express Edition:
Public Class Form1
Dim cn As System.Data.OleDb.OleDbConnection
Dim cmd As System.Data.OleDb.OleDbDataAdapter
Dim ds As New System.Data.DataSet()
[Code]...
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Jul 14, 2010
When it is installed on a machine, it will run for all users. But for some users, it is unable to get some data from the database. I have found out that if it is run-as either administrator,or in winxp compatibility mode, it works. But if not, then some users have the problem.The database is in the same C: drive location as the exe, and it doesn't change from user to user.The computer is using windows 7 professional 32-bit.
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Apr 2, 2010
I am trying to pull sql data into a text file. The code works just fine, until some new data comes in from lazy employees and a couple fields (used for notes/comments) are now left blank. Originally I've never seen them blank so I didn't think anything of it.
col2 = myreader.GetString(1)
It will error if the field is ever null - I even tried using a case when:
case when note is null then '" & empty & "' else note end and set the variable emtpy = '', but vb still thinks that it's null and errors?
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Jun 3, 2010
I have a PHP Page that displays airport information in a list in the following order
[code...]
Using that delimited method of ";" then a break, how can i put all of those into a combo box. There are a few hundred.
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Jan 15, 2012
I generate a print preview, the only thing is, if there is enough data to fill like 2-3 pages I don't know how to generate a new page. It only fills the first page and that's it....
Private Doc As New PrintDocument()
Private Sub btnPrint_Click(sender As System.Object, e As System.EventArgs) Handles btnPrint.Click[code].....
most of the code it's just pulling data from database and printing necessary charges to the invoice, but if the invoice is more than 1 page then I don't know what to do because it only generates 1 page.
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Apr 15, 2012
I am pulling three coloums of data from a SQL view into my data drid Day,TimeIn,TimeoutI want to colour my datagrid rows red if timeout is null and green if both the timein, timeout have data in them.[code]
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May 29, 2009
If I wanna copy the .exe file (with the .ACCDB) to another PC with another path to the files, how can I set this up in the program, so it does'nt search for the .accdb in the wrong directory?
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Feb 22, 2011
My application commits data to the database via OLEDB and I have no problems with that, but I'd like to be able to have a feature of my application which will enable me to open the database.accdb and display a query/report which already exists within the db.
In the old vb5/6 days this would be as simple as executing msaccess.exe and passing it over the filepath/report name in one string.
This has problems, what if the install path of access if different? Is this even supported in .Net ?
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May 18, 2009
I am making an app that can store customer information, and that will have the function to search and find customers.I have no problem with the connection to the database, and I can store data. But i need help to make the search function, and i cant find nothing on my own.
If anyone have some code examples for how to search in the database or event some codes for saving, deleting and so on,
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Oct 8, 2011
I have binded the accdb to combobox but it can not bind the data currently, it can only bind the first character of first record of the table for example, if the records are:
abcd
xyz
ijkl
the combobox will display
a
[Code]...
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Mar 21, 2012
i want to connect to a .accdb access database. the connection string is:
Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:myFoldermyAccess2010file.accdb;Persist Security Info=False;
so if i want to make sure this works on any computer, should i just add the reference to:
Microsoft Office 14.0 Access Database Engine Object Library
is this all i need to do?
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Apr 25, 2010
Does any of you know of a way to create an Ms Access Database (either mdb or accdb) without having to use adox or interop?
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Feb 22, 2012
i have a database and it file format is accdb. can i make it as another file format and the only one can read it is my system?if yes it is possible(maybe impossible for me because of lack of knowledge)
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Jan 15, 2012
I have successfuly created an access database with vb.net accept it is not password protected. password protect this DB. Here is the code I use.
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
Try
[Code].....
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Jan 11, 2012
I'm creating an access DB with vb code.I would also like to encrypt it with a password using code.If it is possible can someone show me how.here is the code I have to create the DB.[code]
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May 3, 2011
The database is a different file.
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Apr 14, 2009
A. A Visual Basic program is developed to read a text file to Access 2003 database using the Data Access Objects (DAO). The following is the DAO command:
Set db = DAO.DBEngine(0).OpenDatabase("C:TempMyAccess2003.mdb")
B. The office Access 2003 database (*.mdb) is going to be upgraded to Access 2007 database (*.accdb).
C. The Visual Basic program is revised to read the same text file to Access 2007 database using the same Data Access Objects (DAO), The following is the DAO command:
Set db = DAO.DBEngine(0).OpenDatabase("C:TempMyAccess2007.accdb")
D. The following error message occurs when the revised Visual Basic program is executed:
"Run-time error '3343': Unrecognized database format"
I had previously used VB6; I am now using VS2008; What is the best manner to now open the database using the VB code? The code works with the Access 2003 database.
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Mar 3, 2010
I've recently made another question about connecting to MS-ACCESS database with .NET in C# or VB.NET. It worked just as intended with MDB, but with accdb it caused an exception in
conn.Open();which follows:
Is there another way to do this? My original intention (like stated in the original question) is gathering some (actually, a lot of) fields.
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Nov 22, 2011
i have an application with access .accdb as backend.How can i convert the backend to OracleBL (Visual Studio 2010 Ultimate)
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