Hide Primary Key Fields On Forms Like You Can In Access?
Feb 22, 2011
I have noticed that whilst in the past using MS Access you could have a primary key field on a form and have it not visible. You could still use it for Dlookups etc using the value in the field no problem even though it is not visible. In Vb if i hide a textbox that is bound to a PK field in a datasource and try to use its value in code i get an error. Making the field visible again prevents the error. My goal is to use a PK bound textbox not visible to the user but still read its contents.
Also, what is the equivalent of a simple DLOOKUP in VS2010? EG. You have the PK and want to know, say 3 other pieces of information from the record based upon the PK you have.
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Jun 18, 2012
I have a complete ms access system build(tables, forms, reports, query). I am in the process of using vb to re-create the system. I managed to show every fields on my vb forms without any coding. However I have some wrong information in my combo boxes. For example I will have repetition(duration, ie 3 months is showing 5 times). Also when I use the arrows only three records are showing. It says 104 records and only shows 1-3. I have also checked all the data in vb that has been transfered from access and it is all similar, ni repetition.
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Apr 23, 2009
ive been reading this forums and it already helped me a lot with my application, im new to visual studio and im currently developing an aplication for my school project in vs 2008.Im using a simple access database with only 2 tables and I creadted a form with a datagrid to show all data inside the tables, and now i want to create search buttons for each field of the table . like, "seach by Name", Seach by date" etc... i tried to use the simple code
Code:
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim cod As String
cod = InputBox("Type the Id to search: ", "Search By ID")
If cod <> " " Then
[code].....
My biggest problem now is that this code works very well to search by id (which is my table primary key), but now i want to search by other fields and this code only allows to search by primary key! Is there any way to use something similar to this code to search by other fields?
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Aug 17, 2011
So Im making a program with 2 different data tables where different columns from those tables are used in different tabs in the same form. This all works good and well so far, but I have one issue which just drives me mad, and a couple minor ones.
1. I have an ID column in each data table marked as Primary Key, Unique and Identity. Problem is that even if I choose to hide this column it just randomly decides if it actually is visible or not. Most often its visible. I dont get it, doesnt this function work? Do I use it wrong? Im not using any code for this, just right click on the data grid, press Edit Columns... And change the Visible to False. It works for all other columns all the time as far as I can tell, but for my ID column its just random.
2. Im wondering if its possible to align the text in some of the columns of my data table to the right, note I only want some of them, not all of them.
3. Is it possible to do maths with the values from the columns in a table on the same row? Like for example having column 3 = column1 + column2?
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Aug 5, 2011
Lets say we have an Access file in a well known path (i.e. "C:MyFolderMyFile.mdb"). That file does not have a primary key set on the table we are interested in . Is it possible to set one of the fields as a primary key (for example the "ID" field , which is also an AutoNumber data) ? And one more thing : I'd like to change the name of a field on that table . For example , lets say there is a field called "My Field 1" (note the space characters) and we want it to be renamed as "My_Field_1" . If it's possible , I'd like both these changes to be permanent in the data base file itself , not just in the imported DataSet ,
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May 27, 2012
I'm trying to create a table in Word using data from a table in Access. There are four fields in the access table that I need. 3 fields are text which I can populate the Word without any issues. However the fourth field is a memo with >255 characters.I'm struggling to come up with the proper code to allow me to populate the Word field with the memo data that has more than 255 characters. The code I have so far is listed below. But when it hits the memo field, it crashes on the line I marked with **. I know it's not text, but I've tried many different field types, but nothing has worked so far.[code]...
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Apr 22, 2010
I am using the code shown below to compare two Access databases with two fields each and write the results to a third Access database. I am getting an error at the "Do While DMReader02.Read = True" line: "Invalid attempt to call Read when reader is closed." Why would the reader be closed at this point if I am using different DataReaders in the two loops?
Imports System.Data.OleDb
Partial
Class Form1
[code]....
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Mar 15, 2012
I have a VB.net application that has three project in it. Two of the project are DLL with references in the primary project. I have a public Model "RegSaveGet" in the primary project listed below. When I look for the namespace for the module from one of the DLL projects I can not see it. I want to use this module from the two DLL projects. I can only see it from the primary project.
[Code]...
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Feb 21, 2011
I want to check in an Access Database if a primary key exists using VB.Net & OleDb:
By primary key name
By number of fields as primary keys
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Feb 8, 2010
I have a database program, and the first row of the table i'm inserting into is a primary key, just a number that increments by one each row. This is my SQL statement,
SQL = "INSERT INTO Squad VALUES('" & (NUMBER) & "','" & txtfirstname.Text & "','" & txtsurname.Text & "','" & txtdob.Text & "','" & cbxposition.SelectedItem & "','" & lblhiddenid.Text & "')"
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Apr 29, 2009
I am in the process of creating a system using VB in Microsoft Visual Studio 2008. The system which I am creating is connected to an Access database via a tableadapter.Currently, I am coding a form for a table called Employee and this form allows the user to create a new employee, edit or delete an existing employee. Editing and deleting an existing employee works fine but adding a new employee is causing me trouble. When I specify an employeeID (this is the primary key), the declared value is stored appropriately in memory and it also displays in the form, however once I save the new employee to the database, the employeeID always defaults to 0 for some unknown reason. So, the record which I've just entered has a primary key of 0 regardless of what the the primary key should be.
The employeeID is declared as an integer and the value is obtained by getting the employeeID of the last record in the table and adding 1 onto it. I've also tried hard coding the employeeID and a specific number, but this does not make any diffence. I've reused the code from another part of the system which works fine before, but why it suddenly doesn't work is baffling me. The employeeID field in Access is a long integer.
[Code]...
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Jan 21, 2009
I'm using vb2005express for forms (front-end) and ms access database. I have a form with a master-detail setup. The problem I'm having is that when I set the primary key column to autonumber, I don't get the pk value generated in ms access database into my master datatable in forms when a new record is created. Then I tried setting the AutoIncreament to True in the pk column of the datatable in my dataset (forms). This generates a number in my pk column but its not the number generated in the database (since I think because the pk column is still set to AutoNumber). So I change the field property of my pk to Number in the access database and on my dataset (forms), i still have AutoIncrement to True.
This works okay since what it seems to be doing is getting the max value for the pk column when the datatable is filled upon form load. The problem now is that I normally don't do tableadapter.fill(datatable) at form load since I think there would be a performance issue if record counts around millions. What happens now is that when I create a new record, the pk generated is still 1 which will cause duplicate violation when saving to database. I'm not quite familiar with access features but in oracle, what I do is I create a sequence in database then I create a function that gets the next value of the sequence. Then at form load I set the datatable.column.default_value = get_sequence. How do I do this in ms access?
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Jul 21, 2009
i am wondering if it is possible to get the source code for the following:
1. use vb.net code to set on/off primary key when connected to Access database
2. update a particular data.
for e.g: hostname: AES-19 *use source code to check data in Microsoft Access database
if hostname is new, insert into Access. if hostname already exist, update into Access
*so that i will not have duplicate data in Access.
[Code]...
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Mar 2, 2011
MS-Access Database
Table: myTable
Field1: ID (COUNTER, which is autoincrement in Access)
Field2: SURNAME (VARCHAR)
Field3: NAME (VARCHAR)
I want to get ID returned, whenever I insert a row. Is there a way? (I am using VB.Net)
EDIT: Solution using SELECT @@IDENTITY
'Execute insert statement and return identity (autoincrement ID field)
Public Function executeInsertGetIdentity(ByVal insertStatement As String) As Integer
' Execute insert
[Code]....
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May 21, 2011
I have managed to successfully create a logon page and have created a form to insert data into one of my tables using text boxes and a "Save" button, however the first field in the table is the named "CustomerID" and is set to Autonumber, this is the primary key of the table. If I enter a record into the table in Access it automatically enters the next valid ID however when I can't seem to make this happen when entering data via my VB form!
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Mar 15, 2010
What's the syntax for an Update query for a table without a primary key?Disclaimer: Frustratingly, adding a primary key is not an option. My program is a small program in a much larger system with poor data management. My development time does not include rewriting the other software.
Note: The database is Microsoft Access.
Note: Similar to: Excel: TableAdapter UpdateCommand for table without primary key
UPDATE: Am I correct in saying, "If the table in the database has no explicit primary key, then there can be no valid TableAdapter UpdateCommand?"
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Aug 23, 2011
On a client i have an anonymous list containing a multi-column primary key previously selected from the DB.Then i need to select all the records from the DB that equals the primary key list i have stored in the memory.[code]
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Mar 2, 2012
How i can import row from TABLE1 to TABLE2 without primary keyfield or adding correct value to primary key
i tried with two different codes, but result is same, it says: "In the column "Key"a constraint on the uniqueness.[code]...
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Aug 5, 2008
I have an access DB with 3 columns, ID#(Primary Key), Minutes, and Profit/Loss. I'm using the Total feature in access which adds a Row 'Total' to the bottom and shows the sums. How would I get the sum from the 'Minutes' column, 'Total' row, and get that to show in a text box (txt002004Min) ?
Imports System.Data.OleDb
Public Class Form13
Dim cn As OleDbConnection
[code]......
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Aug 3, 2010
When I add a new row to an access database, I would like the primary key to be automatically incremented and entered. I've got this to work using a sql database, but it doesn't work with access for some reason. The following code works if I give the code a value for "@key" which is my primary key column. If I leave it out I get the error "Number of query values and destination fields are not the same". I don't want to have to supply the primary key, I want it to generate automatically.
[Code]...
In the database the primary key is type "AutoNumber". Does anyone know what I'm doing wrong?
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Apr 9, 2010
when i will enter form no. in the text box this should check the on the lost focus event either this form no. is already exsist or not.if exist show msgbox?
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Oct 14, 2011
I am new to VB.Net and was using VB 6.0 for the last 10 years. I am having some difficulty in accessing fields and changing these.[code]...
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Dec 23, 2009
How can i hide a borderless form from alt tab? Right now i have 3 borderless form in my app and i want all of them to be visible on screen but only 1 form listed in alt tab.
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Sep 14, 2011
I was wondering if there is a way, I can hide the forms edge. By "edge" I meen the blue/gray half-transperrant edge. Like in the spotify login menu, for example. There is no edge.
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Feb 23, 2009
I've got a data entry form with 3 date fields which can be null.When I open up the form the fields display as today's date when the value is null.I want to be able to display to the user that the value is null and not some spurious or misleading value.Any ideas on how I can do this?
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Mar 15, 2010
Have anyone developed a textbox where it is possible to display 2 fields in the textbox. We want to be able to show ID + description in the same textbox. (When user enter the textbox description may go away and the user can enter an ID)
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Jan 13, 2012
I am successfully hiding a combobox, based on the selection of another combobox. However, I can not get the label of the combobox to hide as well. The code I am using, which is basically the same code for hiding the combobox itself returns the following error:
Error 1 'DOCUMENT_EVALLabel' is not a member of 'WindowsApplication1.Form1'
Here is the code I am using for the label:
Me.DOCUMENT_EVALLabel.Visible = (EVALUATIONComboBox.Text = "Text")
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May 23, 2010
I want to hide an item in a combo box with out changing indexes of other items..the collection of the combo box is hard coded. ex: if I logged as a username ABC then combobox shouldn't have a item called ABC and want to remain other items' indexes as previous.
i can't use cbxOption.Items.RemoveAt(index) becouse indexes will change.
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Dec 9, 2009
Been a long time since my last thread but here we go.I'm using VS.NET 2010 Prof Beta at the moment and I'm trying to list all Nic Cards and their settings into a text box. I succeeded with a script from the web (which had an error in the first place) and some adjustments to it.
It lists all hidden devices too (as to be shown in Device manager: Show hidden devices) I worked my way around it and let it jump to next if it doesn't have a IP address, but I find this a bit clumsy and want to really skip them if they are hidden and not just the way I did this now.
Plus it still does show the same NiC (different name, same MAC#) in the list because it has an IP, but in Device manager this one is hidden.[code...]
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Mar 17, 2012
I'm trying to pull all records and fields from a MS Access table. My fields are: numOne, operator, numTwo and result. I'd like to display those fields in a listbox as the following output: 1(numOne) +-/*(operator) 2(numTwo) = 3(result) or simply 1 + 2 = 3. I was able to get some coding going. The problem that I have is that I'm not finding a way to add the fields on the same line, since I can find the right syntax to have all fields added together.
Dim ConnString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:UsersLeo DaCostaDesktopAPUVB AdvancedDaCosta Weeks 5-6MathOp.accdb"
Dim mySelectQuery As String = "SELECT * FROM MathOp"
Dim myConnection As New OleDbConnection(ConnString)
[code]....
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