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Microsoft Access

MS-Access

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by William Hey
Classical number theories
by Rob Culhane
How to dynamically add access database columns at runtime using VB.NET
by William Hey
Semi-Prime Ordered Sequences (Part 2) is the follow-on to “Exploring Computational Number Theory (Part 1)” and describes a process for ordering the semi-prime base sequences.
by Clifford Nelson
This is a tip that has the code for selecting an Excel file and sheet for import into Microsoft Access. This includes the code required to browse for a file, and populate a ListBox with the sheets of the Excel Workbook, and the code to import an Excel spreadsheet.

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by Gustav Brock
Format amounts in VBA using the Indian number format for currency and amounts
by Clifford Nelson
Method to change source of a Form’s Subform source to a Query or Table in Microsoft Access

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Microsoft Access 

28 Mar 2016 by Member 12421205
Hi! I'm getting the following error with access. From what I could tell with the other formulas in the query, this should work. " is not a valid name. Make sure that it does not include invalid characters or punctuation and that it is not too long. What is wrong?I used the template...
28 Mar 2016 by CHill60
"is not a valid name" means that your column name is invalid, not the data you are trying to put into it.Spaces are not valid in column names unless you surround them with square brackets i.e. [User Name]Better would be to avoid spaces altogether e.g. UserName
28 Mar 2016 by Member 12421205
Solution Found. Formula should equal: Left([staff.FirstName],20)& (".")&Left([staff.LastName],20)&("@valleycentralschools.org")I just had incorrect brackets. Thanks for all who looked.
12 Jun 2012 by sigma_ivan
hi everyonei would like some help with the application that we developed.this is for our office use only, and what our app is doing is extracting the text from the pdf file using pdflibnet.dllbut we lately encountered a problem with a particular pdf file.the problem is when we try to...
30 Oct 2014 by Member 11194404
Db: accessim using Visual studio 2010what syntax to use for making the datagridview output only the data that is in the database only using for example Birthdate = date today not the year..im making this bday reminder program, just a simply day to day reminder who will be having a...
30 Oct 2014 by Robert Welliever
I'm not sure I have the syntax correct as I don't want to open Access and find out, but the idea is that you use the DatePart function in Access. You can compare parts of dates with it. Try something like:SELECT * FROM BIRTHDAY_TABLEWHERE DatePart ("m", [BDAY_FIELD]) =...
30 Oct 2014 by Member 11194404
kinda confused on this part.. =/If Not con.State = ConnectionState.Open Then con.Open() End If Dim da As OleDb.OleDbDataAdapter Dim Sql As String Sql = "SELECT * FROM bene_records where b_date" ''
1 Jun 2013 by sahrarainmelody
hi I have a dataGrid that I should insert its columns values to an access database ...but I have problem with " command.ExecuteNonQuery();"my project is not finished just for this error ... please help if you can . it's my code : for (int i = 0; i
1 Jun 2013 by OriginalGriff
Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead, and your problem will probably disappear at the same time.
2 Sep 2012 by umar.techBOY
can we break the encryption, all i found by google and experiments is:The first line of a file (78MB 8n size) (database of a free religious books software) contains these strings "Standard ACE DB" "M i c r o s o f t b a s e c r y p t o g r a g h i c p r o v i d e r" (reading in c#,...
19 Dec 2013 by agent_kruger
i have developed an application and it is running fine. But when i uploded the software to one of my client machine it gives the following error.system.security.permissions.hostprotectionattribute from assembly mscorlib.I Am using c# windows application and database is access.Note: On...
19 Dec 2013 by Dave Kreskowiak
Are they running the .EXE from a network share?
21 May 2014 by agent_kruger
Solved it :- as anti-virus software and firewall were not granting me permission.
11 Aug 2020 by Member 14898617
i am building a win form app using access database as data-source , and in the search button of my winform i have this code" private void searchAccessDatabase() { if (string.IsNullOrEmpty(KeywordTextBox.Text.Trim())) ...
11 Aug 2020 by Sandeep Mewara
Think, this should not be in single quotes: 'System.String' Further, can you make sure the strFilter looks like as expected? Surely following corrections: 1. Is it not missing spaces between all the OR conditions? 2. Missing OR in line: ...
22 May 2010 by sporrow
private void ekle_Click(object sender, EventArgs e) { string kaynak = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=gunluk2.accdb"; ; OleDbConnection baglanti = new OleDbConnection(kaynak); baglanti.Open();//error is here string...
23 May 2010 by Estys
The message is clear.Does this[^] help?Cheers
10 Nov 2017 by Member 12117439
'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine. I am getting this in visual studio only after upgrading from 32bit office 2013 to 64bit office 16. I have already installed the 64bit database engine and my published project from IIS is working with the existing access...
8 Jun 2018 by Member 13864666
At first, when it showed this error i did put [*FROM] before the From statement e.g: ["Delete student_id *FROM student] Still it doesn't work Can someone pls help me on this What I have tried: Private Sub btndelete_Click_1(sender As Object, e As EventArgs) Handles btndelete.Click ...
9 Jun 2018 by Richard Deeming
As the error says, your DELETE syntax is incorrect. Your code is also vulnerable to SQL Injection[^]. NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query. And you probably want to ask the user whether or not they want to delete the record BEFORE you actually...
8 Jun 2018 by phil.o
Never, ever, construct an SQL query like you do by concatenating string obtained from user inputs. This leaves your code wide open to SQL injection attacks. Better use parameterized queries instead. This subject is discussed daily here on CP so you will not have a hard time finding some more...
8 Jun 2018 by Maciej Los
As far as i know, MS Access does not support DELETE + JOIN. You have to change your sql command to below form: DELETE Table1.* FROM Table1 WHERE EXISTS( Select 1 From Table2 Where Table2.Name = Table1.Name ) But, when i did look on you query again, i think you need only: DELETE FROM student...
7 Feb 2011 by vijay.darji2
I was live my website about a few day ago. It was developed in ASP.Net, C#, and Ms access 2003, SQL server 2005 is used as a database. HTML page is display well, but when we open .aspx page it will not display and giving error. Please somebody help me to sort out this problem
7 Feb 2011 by Parwej Ahamad
Check with your provider, is he providing .Net framework support?
7 Feb 2011 by velmahesh
Check the Code based on Error Message..
9 Aug 2014 by Paramu1973
Hi, Iam using vs2010, Access 2010. I have Access DataBase with 4 Tables. I wish to have a select query from all other tables as required...Is it possible?Thanks For The HelpsMy Query :-===========Select iv.*,pt.pty_name,cm.commodity,it.itm_description,cy.company_name from (invoicetbl...
9 Aug 2014 by OriginalGriff
Remove the brackets.Select iv.*,pt.pty_name,cm.commodity,it.itm_description,cy.company_name from invoicetbl iv left join partytbl pt on iv.pty_code=pt.pty_code left join commodity cm on iv.commodity_id=cm.commodity_id left join itemtbl it on iv.itm_code=it.itm_code left join companytbl cy on ...
3 Jul 2015 by oula alsheikh
i want to use Microsoft tree view control so i had to add mscomctrl.ocxto my project as a reference and because iam working on windows 7 64 bit and the mscomctrl.ocx has 32 bit controls i registered it in the command promptmy problem is even though i add this ocx as reference and i can...
17 Mar 2013 by Member 9918061
i'm doing a project on a primary school's financial system. the software is complete. the analysis is done. could someone please tell me how i'm supposed to submit the complete documentation at my school by tomorrow? monday the 18th of march is the last date
17 Mar 2013 by Sandeep Mewara
could someone please tell me how i'm supposed to submit the complete documentation by tomorrow?Submit to whom?monday is the last date For what?We have no idea whatsoever what you are talking of. If you have done a project based on some deadline for someone, please contact that...
7 Dec 2015 by ilostmyid2
BitLocker was turned on on my previous Windows 7. It was working properly until I had to change my Windows 7 and reinstall it on another drive, this time SSD instead of HDD. After installing Windows 7, I got "Access Denied" error message when i went to unlock the drive. The password was correct...
7 Dec 2015 by ilostmyid2
it was a security issue, not a bitlocker issue.
3 Jan 2017 by ilostmyid2
I create an access database file by using Microsoft Access 2007. I use Visual Studio 2010 to write a program which need a database. I want to use the file as the database. I think this is the simplest way to write a rapid program to hold some data and manage them. Am I right?Then, in the...
3 Jan 2017 by Wendelius
I wouldn't think happened because a user isn't defined. As far as I know 0x8000FFFF is a catastrophic failure so for some reason the connection cannot be established.I would check if the OleDb provider is correctly installed and can you connect to the database from the code using...
4 Jan 2017 by #realJSOP
I provided a class in my solution to this answer: How do I run access from a WS 2012 and IIS 8 with ASP.NET[^]
3 Jan 2017 by OriginalGriff
There are quite a few reasons why that may be a problem.Start with the obvious: is the file available to all users? It's quite possible that the Connection Wizard isn't using your user ID to access the file, so if the file or teh folder it's sitting in doesn't have the required access...
3 Jan 2019 by Atipos
Hello first of all I explain what I have in my hands. Two masks, in mask A, there is the "user" field and other fields (what interests me is "user"). While in Mask B it would be the login, with username and password. When I enter a User in Mask A, I automatically open the Login Form with which...
3 Jan 2019 by Gustav Brock
I have no idea what your Mask A and Mask B could be, and the explanation is very confusing. The title, however, is clear, and the answer is simple. In the form, where you have that field bound to a control (textbox), assign the global to the Value property in, say, the OnOpen event of the...
28 Nov 2015 by Jeff Garcia Samson
Hi everyone, how will I insert an image to MS Access database after I converted the image into byte[]?I used this code to convert the image into byte[] public byte[] imageToByteArray(Image imageIn) { MemoryStream ms = new MemoryStream(); ...
28 Nov 2015 by ridoy
Like this one:var pic = File.ReadAllBytes(yourFileName);OleDbCommand cmd = new OleDbCommand();cmd.CommandType = CommandType.Text;cmd.CommandText = "insert into Table1 (id, picture) values (@p1, @p2)";cmd.Parameters.AddWithValue("@p1", TextBox1.Text);cmd.Parameters.AddWithValue("@p2",...
28 Nov 2015 by Krunal Rohit
public static void AddEmployee( string lastName, string firstName, string title, DateTime hireDate, int reportsTo, string photoFilePath, string connectionString){ byte[] photo = GetPhoto(photoFilePath); OleDbCommand command = new OleDbCommand( "INSERT...
12 Sep 2013 by DAVID DUSHIMIMANA
Hello Guys,I would like someone to help know how I can call query of access database into visual studio 2010 express( vb.net) using data-bound controls, I need codes to use because I tried like others tables it did not work out. Here are the codes I used to update, or just to save data in...
30 Oct 2014 by Member 11194404
This is the part that I dont know the syntaxI want that my form automatically loads the data from the Databaseby using the b_date but only display the records if there is a match in month and datenot using the year, The program is like a Birthday ReminderPrivate Sub...
30 Oct 2014 by OriginalGriff
Try:SELECT * FROM bene_records WHERE DATEPART(mm, GETDATE()) = DATEPART(mm, dateColumn) AND DATEPART(dd, GETDATE()) = DATEPART(dd, dateColumn)
30 Oct 2014 by Maciej Los
Please, read my comment to the solution 1I'd suggest query like this:PARAMETERS [mnth] INT;SELECT FROM bene_recordsWHERE b_date BETWEEN #DateSerial(Year(Date()), [mnth], 1)# AND #DateSerial(Year(Date()), [mnth]+1, 1-1)# Above query should return data for given month...
2 Apr 2010 by Ramana Nori
I've written a small MS Access 2007 program having links with the tables of SQL Server 2005 Express Edition. The problem is it worked out in development environment. But it's giving error during production environment.SQL State '08004'Sql Server Error: '4060'Server rejected the...
3 Apr 2010 by Luc Pattyn
This[^] might apply. If not, look here[^].:)
19 Apr 2011 by RDBurmon
Hello All ,I have one issue regarding the MS access query.I am using MS Access 2007 and Created the DB and tables.The tables having the date column. Better say below is the table definition and data.Id , Member , CollectionDate1 ABC 12/01/20102 DEF ...
18 May 2011 by ChristinaVelez
Hi, I have an Access 2007 form containing an option frame with 5 search options, and a search button. The button generates a querydef for "qrySearch" based on search option,and results are to appear in a listbox on the same form.When I click search the first time, results appear in the...
18 May 2011 by ChristinaVelez
Clearing the textbox is the solution:at the top of the Sub I added:Me.lstBxResult.RowSource = ""then at the end of each option:Me.lstBxResult.RowSourceType = "table/query"Me.lstBxResult.RowSource = "qrySearch"Me.lstBxResult.Requeryand removed the Docmd.OpenQuery since it...
24 Dec 2010 by abi1988
I want to use MS Access as database for my C# windows form application.I have used OleDb driver for connecting MS Access. I am able to select the records from the MS Access using OleDbConnection and ExecuteReader.But I am unable to insert,update and delete records. My code is as...
24 Dec 2010 by Hiren solanki
OleDbCommand com = new OleDbCommand("INSERT INTO DPMaster(DPID,DPName,ClientID,ClientName) VALUES('53','we','41','aw')", con);I am not finding anything that causing error, But the exactly error statement can clarify the thing further, So please post it here.The way you're using insert...
24 Dec 2010 by abi1988
I got solution for this problem.I was keeping the database inside the project(solution) itself.But when I kept the database out of the project as per one's suggestion, the above code works fine. I don't know what is the relation for this problem with the location of the database file.But...
9 Mar 2011 by RadethDart
Alright, I am having the hardest time figuring this out. I have done research on fixing this for a couple days and I am stuck. It is time to ask for help.In my project I am trying to delete a row out of the database and I read how to do that from many different sources telling me to use Ole...
10 Mar 2011 by Dave Kreskowiak
I suggest reading the documentation on AcceptChanges and Update. Update writes the dirty records in the DataSet/DataTable back to the database. AcceptChanges tells the DataSet/DataTable that the changes that were made are now the current state of the records. The two operations are completely...
16 Oct 2012 by Aciobanita Costel
I have the following code:private void verificareData() { int regCasa_id; Program.Connection.CommandText = "SELECT regCasa.regCasa_id, regCasa.regCasa_date, regCasa.regCasa_soldinitial, regCasa.regCasa_soldfinal FROM regCasa WHERE regCasa.regCasa_id=(select...
16 Oct 2012 by Anele Ngqandu
Hehe...HiWell since you have this long code and we just don't have time to read it, I suggest you split your code and use the 3-tier Architecture [^]...your code will be much clean and better.
12 Apr 2011 by Fadi-1
the expression On Open you entered as the event property setting produced the following error A problem occurred while Stock & Accounting program Ver 1.1 was communicating with the OLE Server Or ActiveX Control
12 Apr 2011 by Richard MacCutchan
This looks like a message that should be directed to some individual. If it is as a result of an article then please post in the forum at the end of the article.
9 Jul 2011 by zhonos
hi. can you help me my brother?i have an access database. with these fields for each record: id, name, age, sex.for example my database file has these records:1 ehsan, 23, male2 mohamad, 50, male3 ghazal, 25, femalei want to show the names in a list like this:• ehsan• mohamad•...
9 Jul 2011 by Monjurul Habib
You will get help from here & this is smart approach(Popup Instead Of New Page). Or you can try using same page this is also good, but using another page and a back link/button is not a good one.:) Enjoy.
9 Jul 2011 by thatraja
You may use Gridview control with Detailsview or Formview. Looks like you didn't try with right keywords in search engines. I found this in CP. GridView-DetailsView (Master/Detail) Control[^]
5 Nov 2020 by   Forogar  
We are getting an unexpected (massive) slow-down in an Access 2016 VBA application over Citrix. No code changes, possible anti-virus update, possible Windows update, possible Citrix and Security updates. Perhaps the number of records has...
5 Nov 2020 by Dave Kreskowiak
Everything you listed is a possible cause, and then some. There is no way anyone is going to be able to tell you, "this is what's doing it". You're going to have to investigate all of these possibilities yourself. After checking the size of the...
7 Sep 2015 by Pramod Kharvi
Hi am trying to do simple bank software. Using front end as VB and back end as ms access. I have 2 table namely "newacount" and "deposit". A newacount contain a fields like accholdername,accnum,ledgeramount, and deposit table contains field accnum and depoamount. Now my question is if I deposit...
7 Sep 2015 by Leo Chapiro
Try this in "After Insert Event Procedure" of the "deposit" table:UPDATE newacount AS n SET n.ledgeramount = d.depoamountINNER JOIN deposit AS dON n.accnum = d.accnumAnother one possibility:UPDATE newacount SET ledgeramount = d.depoamountFROM ( SELECT...
20 May 2010 by Ben.Regaya.Hedi
Hi All,is it possible to send a message to a Queue from a client Machine to the a server machine that contain the Queue?Thanks for Help
27 Sep 2011 by Central_IT
Hi,I wonder if anyone has come across this problem.I have an Access database and added new queries to this database. I then make a copy of this database but when I view the copied database, my new queries are not there. I go back into the original database and the queries are there.I...
21 Jul 2012 by OriginalGriff
Best guess? Your database is not where you think it is.If you have added the DB to your project, then it it quite likely that you have copied the source file, but VS is working from a copy of this in the Bin/Debug folder.
30 Jul 2010 by Yusuf
That is an old book, don't know if it is still printing, may be it is out-of-print. Try Amazon's used book section. We luck you may find a copy of the book with working CD. The price might be about $1-$5 in the used book section
23 Mar 2011 by Muhammad Aamir SumSum
My Qustion..Table NameJ_voucherFields are:Voucher Number, Date , Narration , Debit , CreditAutonumber on Voucher Number:I want Autonumber Like That JV-TodayDate-000AutoNumber
23 Mar 2011 by OriginalGriff
Access provides autonumber: it is called an "autoNumber" field, surprise, surprise. Also unsurprisingly, it is numeric only...I would keep the Voucher code separate: The Voucher number is the Autonumber field, the Date field is the TodayDate, and build the voucher code from that using...
20 Nov 2013 by Domus1919
I've write this query in an access 2007 database:SELECT Ordini.ID, Ordini.Data, Clienti.Cognome, Clienti.Nome, DettagliOrdine.IDProdotto, Prodotti.Descrizione, Prodotti.Prezzo, DettagliOrdine.Quantità, ([Prezzo]*[Quantità]) AS Totale, Ordini.Note, Produttori.Nome, Ordini.Ordinato,...
20 Nov 2013 by Maciej Los
There are 2 options:1) building queries "On the Fly" using userform and VBA[^] or2) using IIF function[^] with declaration of PARAMETERS[^]PARAMETERS param1 CHAR, param2 CHAR;SELECT ...FROM ...WHERE Field1 = IIF([param1] IS NULL,'*',[param1]) AND Field2 = IIF([param2] IS NULL, '*',...
24 Jan 2011 by maccaro
Hii'm developing a VBA application in Access 2007. To run the project, I have to include the "excel 12.0 object library" by selecting it in the "add reference" dialog. The problem is that if i go to the add reference menu, i can't find any library. The dialog is empty. where can i find the...
24 Jan 2011 by maccaro
There are no tabs in the dialog...
24 Jan 2011 by gammagtmw
Is the "COM" tab really empty? Seems unlikely to me.Open the "Add Reference" dialog, switch to the "COM" tab and scroll down to "Microsoft Excel 10.0 Object Library".
24 Jan 2011 by maccaro
Thanks to all!Solved by using the menu in the VBA window instead of the Access one.
5 Mar 2012 by arpoarpo
Suppose we have an Access 2010 form that allows a user to navigate over every single employee in the table Employees.Suppose also the form contains a TextBox txtId where the user can type the Id that uniquely identifies an employee. After clicking a button OK the form should show the...
5 Mar 2012 by Clifford Nelson
An Access form has a Filter and an FilterON property. Just need to set the FilterOn to True and the Filter property to the text as would appear in a SQL Where clause (ie, Company LIKE "C*").Me.Filter = "Company LIKE """ + CompanyFilter.Text + """"Me.FilterOn = TrueThis should also work...
23 Aug 2012 by Belial09
Hi,I have developed an VB.NET InteropUserControl which works properly on my pc.The InteropUserControl is used in a form in an Access 2010 MDA File. If i deploy it as an MDE File to another pc, the Form won’t open with the errormessage "There is no control in this object". The Control...
17 Sep 2014 by avianrand
I maintain an Access app for a client who had it written over 15 years ago. We've upgraded it over the years and now it's running under Access 2010. One of the users today showed me a combo box that has been giving them problems. I checked it out and realized that it was auto-correcting anything...
17 Sep 2014 by Sergey Alexandrovich Kryukov
If even you, who probably could look at the full source code, cannot tell "why the heck would anyone want that in an Access app", how can people who cannot see this code guess why one wanted it?I understand that you badly need some resolution, but could you be a bit more realistic. Can you...
17 Sep 2014 by avianrand
First and foremost.... NOT "TRACK NAME AUTOCORRECT." I'm very familiar with that "bug". MS fixed it in Access 2003 and turned it OFF by default. You apparently didn't read my OP carefully. If you had, you'd know why I didn't post any code. The code has zero, zippo, nada, nothing to do with this...
16 Jun 2014 by avianrand
This worked in earlier versions. But my client has moved to Access 2010 and Windows 7 recently. I'm creating a bar graph in an Excel file. Then I'm setting the source doc of an unbound object frame to that Excel file. This has worked perfectly for years and years and years. But it's not...
18 Jun 2014 by avianrand
Never mind on this issue. I bailed on it completely. I decided to use the chart object in a subreport. I wrote my own code to create the histogram data. It is working better, faster and more accurately than the Excel calls were before.
19 Apr 2015 by RogerPar
My OS is win 7 prof 64 bit and I use Access 2013.I have a small and simple password creating App which has one main Form. it selects from the User's input, how the password is to be created, like 2 UC chars + 2 LC chars, numerics, and special characters, and then when a command button is...
19 Apr 2015 by OriginalGriff
If you get an error message you don't understand, the first thing to do is Google it:...
21 Apr 2015 by PerryMrk
Here already the similar question was discussed: http://www.ask.com/answers/639305081/hi-i-have-a-corrupt-database-and-i-m-trying-to-salvage-my-data-any-ideas-i-have-tried-exporting-the-data-to-another-database?qsrc=14106
2 Apr 2015 by JammoD87
Hi,I have a legacy Access 97 Frontend application which utilises a SQL Server 2005 backend over a SQL Server ODBC Driver (Connection), we use the Linked Table feature on this setup.I create, amend and link in tables on a daily basis and I am aware of the conversions that occur between...
12 Dec 2012 by Pyakaa
i want to access the hard disk drive of another system, whose ip and log in credentials are know to me, copy a file and send it as an attachment to my program (running in a different system...)the above has to be done using program(i.e no manual intervention)Plz let me know how to do it..
12 Dec 2012 by Sampath Kumar Sathiya
Hi,Please rerer the following link,Access remote PC's share file by UNC path with username/password[^]
15 Apr 2013 by Pyakaa
i found the answer to it, as the in-build function impersonate().this will solve the purpose
29 Apr 2011 by Member 7838027
hi, please help me with this one.i have a list in one class and i want to access that list from another class to add another value to that list.namespace ReportsUIScreens{ public partial class Screen_2 : UserControl { public Screen_2() { ` ...
30 Apr 2011 by DrNimnull
Hi,you must declare the List as a property. To access the list from an other class you must give an instance from your List to the other class.The classes where you must give an instance from your List to access it://FilterHistory.xaml.csnamespace ReportsUIScreens{ public...
29 Apr 2011 by Deepthi Aravind
Hi,, Declare a property with type "List"for eg:public List List{get;set;}u can assign values into this property and access this list property from another class...
4 Mar 2010 by ninadcsl
I am new to addin development. I have to develop an addin for MS Access that will allow the user to open any database strictly in readonly modeIf not all can we at least make a single database readonly. Hardcode the name and path of the database if required.The DB will be readonly in access...
5 Mar 2010 by DaveAuld
Any database file opened by Access will be read/write unless you use some form of authentication.You could use NTFS security permission on a folder or you could use Database Level security.If you have a mdb file sat on a server, there is nothing stopping someone else opening it with...
21 Apr 2010 by Amean
Hi there,I have a database in access and it contains 10 tables.I have managed to get a selected table to disply on a webpage using Visual Studio, the Access data source, and the Grid view.in the grid view I have selected one out of the many tables I have. This displays without a...
22 Apr 2010 by Tony Richards
My suggestion, based on what I've seen to work:Have a 'chain' of combo or list boxes. Leave only the first one enabled, and get the user to select an item. Make this cause a post-back or an AJAX call (I personally think AJAX is better as it's less 'jarring') and update the next in the chain...