VS 2008 - Writing To Blank Access Database
May 16, 2009
I have searched all over the forums and not found an answer to my question. My question is how do i write to an access database at runtime. The database is also created at runtime. I have a dataset loaded with a table that i needs to be written to the database. how would i write each row of my dataset to my database? Sorry if this sounds a little jumbled together it is late and i am tired. If it is unclear you can ask me and i will answer any questions you have about my question.
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Aug 13, 2011
I want to add a blank value to a field in access database with vb 2008 command.
Problem 1: Here is my code, it shows conversion to string not possible errors
Private Sub btnRedThrow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRedThrow.Click
Dim dbCnct As New DBUtills
[Code]....
notice the fifth and last value is empty. But it is not being added into the database, how do I do that?
Problem 2: Why does an additional field from my access database disappear even after I manually created the field?? (access database 2003 version, extension is .mdb) I'm using visual studio 2008
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Jun 24, 2010
im having an issue writing to an access database via vb.net 2008 i can read form it but not write?
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Jul 19, 2010
I use Visual Basic in Access, and I have no problem writing data directly to a cell in a database table. But I can not figure out how to write the code for Visual Basic 2008. For example I would
use Me![cust_Cost] = 20 to input 20 in the database table.
I have purchased two different Books on Visual Basic 2008 and not one of them show how to input data manually.
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Aug 18, 2010
I am writing an app in VB2010. My code parses a text file, assigns data to variables My??, and then attempts to store this data in an access 2010 (actually access 2007 format) table. Yet, whenever my code gets to MyRow.Item("Artist") = MyArtist I get an error 5 'Artist' does not belong to Table MyTable, but the field/column does exist in the table as do all the others.
01Dim tbl As DataTable = New DataTable(MyTable)
02tbl.Rows.Add()
03Dim lastRow As Integer = tbl.Rows.Count - 1
[Code].....
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Sep 24, 2009
I am creating a form which has the customer information entered by the user.When the user clicks submit the row need to be inserted into table "customer".writing the code to connect to the access database and insert the new row?
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Sep 19, 2009
I'm running Windows Vista with admin privilege and UAC is disabled but still unable to write to windows registry!
My.Computer.Registry.SetValue _
("HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun", _
"Test", "C:Test.exe", Microsoft.Win32.RegistryValueKind.String)
I'm getting error "Unauthorized Access Exception was unhandled."
"Access to the registry key 'HKEY_LOCAL_MACHINE....' is denied."
I've googled the net and found that registry permission elevation is required for admin tasks, Is there away to take registry key ownership through VB.Net code??
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Mar 16, 2010
I'm currently doing a project, I have 5 text boxes, and the information I put inside them get's added to a record in my database..In this record, an auto-number is allocated, and I need to display what the auto-number allocated is..
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Jul 12, 2009
My application creates a file by writing to System.AppDomain.CurrentDomain.BaseDirectory() & "data/" & filename...Now this works fine usually, but I just added a setup utility to the app, so now it installs to the program files directory. It installs correctly and creates the data folder, however when it tries to write the file it gets an exception "unauthorized access".
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Jun 15, 2009
I have added a MySQL Database as a data source in VB using the MySQL .NET connector and added the dataset . How do i write to the database from there?
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Jun 21, 2010
Basically I would like to have an sql statement which selects all the bookings from a table in microsoft access callled tblBookings where a certain date (selected by a datetimepicker) selected in vb.net.
The field the date is in access is bookingsdate and that is a shortdate aswell.
The problem is that even if the dates are the same the headers come up in the datagridview but no data.
This is my code:
Dim con As New OleDb.OleDbConnection
Dim OleDBCon As System.Data.OleDb.OleDbConnection
Dim ds As New DataSet
[Code].....
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May 15, 2010
I'm a new member to this site, and I have been searching for a solution to this problem.. Although I have found variations in the problem, nothing has seemed to work for me. Just started programming last year.
I am trying to populate text boxes in a form based on information from an Access Database. Everything is working, except when there are empty field values; the program then crashes because a DBNull value is returned. I set up an if statement to check the index as the rows are read for DBNull values, the problem is How do I actually change the value in the field from DBNull to a blank string ("") ?? Everything I try gives me an error, most often saying something about setting up an object. The problem happens within my if statement of the do loop...I'm thinking maybe I need to set up parameters ? Or an actual edit session within a datarow variable?[code]...
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Jan 2, 2010
I'm using a OleDB connection to a access database. I'm entering a row into the database to set some user preferences. What i need to get is get back the row ID of the row I just entered. I'm more familiar with PHP and with PHP I use use this entry
[Code]...
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Aug 25, 2008
I am working on a timekeeping application, using Visual Basic 2008 Express edition with an Access 2000 database.The application requires the user to complete a timesheet by recording in tme and out time daily. Blank fields are perfectly frquent and perfectly legitimate.Using these lines of code it works perfectlywhen there is a time value in the database.[code]This indicates to me that the code to ignore a field containing nothing is not working
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Feb 21, 2011
I am not sure about method to publish my program. But basically when I publish it no errors at all...I have database name usurfdb.mdb. I have set it build action to content and copy to outputdirectory = copy if newer.Should I amend anything on my usurfdbdataset1.xsd as well like I did on my .mdb?
Dim con As New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|u-surfdb.mdb;")
I am wondering, When I try to locate the location of my database after the program
I have 2 inputs from 0-180 for x and y i need to add them together and stay in the range of 180 and 0 i am having some trouble since 90 is the mid point i cant seem to keep my data in that range im doing this in vb.net
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Jun 11, 2009
i have a combobox which get value from database through dataset. when i run the program n click on the combobox, the value is auto fill in with data from database. is there anyway to add a blank entries to the selection on the combobox??
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Apr 7, 2011
I have problem insert records from my vb application to my access .mdb dataabse with all columns set as not allow zero length string and when I insert a records in which one of the column is null value it show allow zero length string error any idea how to create a code in visual basic in which allow zero length without change the configuration of the database?
For example my record have job_no name station 1 des 2 albert so I need to pass job number 1 to my access database but came out with error zero length string off course my access database is set no all to do so but I have my reason is that any sample code to force to accept blank strings?
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Mar 29, 2009
I am trying to utilize the access database, but I'm getting an error message: Value cannot be null. Parameter name: dataSet
[Code]...
That's the code I'm using, why I'm getting this error?
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Jun 4, 2011
I can save my data to access database and in the access database field I set it to date/time.But problem is when I get the value out from the database.. the format is always month/day/year hour:minutes:seconds example today: 5/2/2011 12:00:00..How to get the value into listview becoming May/2/2011 without the hour..Here's my code to get it from database ListView1.Items(i).SubItems.Add(dt.Rows(i)(14).ToString).The second problem is.When I would like to edit, how can the datetimepicker get the listview value ? [code] info: using access 2003 (.mdb) the Date of Birth field has been set into Date/Time.
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Jun 15, 2009
I am trying to Read a text file from vb.net and then write it to microsoft access. The following is the codes that i have written for this project.
However, there are errors stated:
1. error in inserting record
2. Warning 1 Variable 'DoCmd' is used before it has been assigned a value. A null reference exception could result at runtime. C:Documents and Settings�74958XDesktop6jun[updated]6junForm1.vb 63 9 6jun[code]....
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Feb 22, 2009
[code]i want to write Delta_r(i) in access data and then i want to connect that file to Crystal report for plotting.
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Jul 28, 2009
I have spent several hours trying to delete a row and insert a row into an Access database using the OLEDBDataadapter and dataSets without any success. I don't get any errors it just doesn't update the datatable. Here is the last version of the code I have been trying to get to work. I have done a lot of searching and have
Data save
Private Sub SaveNumDte(ByVal ltoNum As String, ByVal ltoDate As Date)
Dim numTotal, x, MaxRows As Integer
[code].....
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Sep 10, 2011
What i've written opens an Access database and one can read and write into it (on a table called Journal)It does indeed work for newly made Access files. However it doesnt work with a specific Microsoft Access database (again .mdb) which was made with a very old Access, like Access 2000 or something.The error message is: Syntax error in INSERT INTO statement.Inside the zipped file below you will find the source code of the program, along with an access file that the program CAN read, and the one access file that i NEED the program to reed but it cannot!
To see what i mean run the program one, try to add a new line to the database. you get an error!now rename the Journal.mdb to "journal.bak.mdb. And the journal_working.mdb to Journal.mdb try to add a new line to the database again without altering the source code at all. it succeeds now!!
NOTE: the program can READ data from both files. but it CANT write data to the old access file
this is the code:
Dim cb As New OleDb.OleDbCommandBuilder(da)
Dim dsNewRow As DataRow
dsNewRow = ds.Tables("AddressBook").NewRow()
dsNewRow.Item(1) = txtFirstName.Text 'or .Item(1) =
[code]....
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Mar 25, 2009
I am having trouble writing information to a 2007 access database. I just want to write a numeric value into a data base. My table name is KW and my field is also referred to as Kw.
Dim theOleDbConnection As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;" & _
"Data Source=C:\Documents and Settings\HP_Administrator\My Documents\value.accdb")
Dim theOleDbCommand As New OleDbCommand("INSERT INTO[KW] (Kw)VALUES (@P1)")
theOleDbCommand.Connection = theOleDbConnection
[code]....
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Nov 23, 2010
At my company we build a lot of small, administrative type databases generally used by a dozen or less users. We have thus far done them entirely in Access. I've been doing VB forever and would like to write nicer, rich UI apps using a VB front-end to and Access database instead, as I find Access apps clumsy to use; VB apps look better and have more UI options.
I've started to play around with building Data Sources, Binding Sources, etc. and dropping them on forms, trying to create something useful with as little code as possible. I'm just wondering what folks generally think of using this approach. Remember this is for small, not complicated db apps with few users.
I know in the VB6 world bound controls took some heat for being not worth the effort it saved you.Also, is there a good book on the subject that concentrates on creating VB/Access apps with minimal code?
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Oct 15, 2011
I have an application that has an Ms Access 2007 DataBase which runns great if access is installed. Is there any code that I can use in vb that I would be able to run access with out installing it.
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Sep 30, 2011
Here my proj details
details:
application:vb.net 2008
database:ms access2007
32bit OS vista
actually what the problem is my project is working fine with windows vista in all the systems my other teams members are using 64 bit windows7 in windows 7 projects runs but couldn;t able to connect with database not able to save the data.
i want to use the project in windows 7
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Jan 2, 2012
I made a Microsoft Access Database on my old computer and it worked fine with vb 2008When i try to go to my form containing the tables from Microsoft access, I get this message
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Aug 3, 2009
Access data from a .sdf database (2008)?
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Feb 15, 2011
I have make database in vb.net 2008 with access database is data grid i need to calculate total but i dont
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