Increment A Primary Key That Is An IntDigit When Adding A New Record To A Database?
Mar 16, 2012
How do I increment a primary key that is in integer digit format to a record when adding or pressing an "Add New" button that I have on my form. In other words, I have a 'Add New' Button that has the code following:
[code]...
As you can see from the above code, that most of the textboxes are cleared so that a enduser can insert his or her values and information. Currently, I do have the OrderNumber which is the primary key cleared, however, I would rather have this field auto incremented to the next digit. For some reason, at the moment, I just do not know where to begin to set this field so that a digit canbe inserted and incremented rather than cleared.
Is there anyway to reset a Table's a primary key to 1that is Identity Specification Yesautoincrement by 1 seed 1? We are using SQL Express, but never touch SQL directly.The problem is I have one data table where the primary key is up to 2,366,784 - this table gets added to extensively, but then deleted extensively.
EDIT: was a design issueI am undergoing a computing project for Alevel computing.The project consists of a 6 tabled Microsoft access database. I am using vb.net to code the application for a student tracking system.My ERD is below:My problem: How to insert a new compound Primary key into a existing table?If I increment StudID and CourseID in tblContact then I need to increment them in tblStudentCourse which leads to records not pointing to the right directions..For enforcing the relationships I am using the .relations with the dataset.
I have a database linked to my VB.NET project using the data source wizard. I've created a log in form using a table in access that has the details required to log in.
The code is: Imports System.Data Public Class Form1
I have been trying to get the database sample to work. I have been unable to figure it out. I posted my code below, but something isn't working right and I cant figure it out. Please review my code if you have a chance and let me know what I am doing wrong.
I'm at another wall in my project. I've been trying to get it to add a new record to a table but I got a message that said "Object reference not set to an instance of an object" but I have no clue where the error is popping up. I am also unsure of whether the coding for adding a record will actually work on not.Here is the code for the form with the bits subs that I'm sure aren't the problem removed (as they have no relevance to adding a record);
Imports System Imports System.Data Imports System.Data.OleDb Public Class NewStock
We're trying to work out some code for saving from a textbox to a database field without using DataGridViiew. We have it working using the automated controls that Visual Studio gives us, but if we have a form with text boxes, can we make it so that, on a button click, it dumps that stuff into a field in a table?
I'm getting an error doing this. Here is my Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click Dim con As New OleDb.OleDbConnection Dim dbProvider As String Dim dbSource As String Dim dsgames As New DataSet [Code] ..... The error appears on the very final line, "dagames.Update(dsgames, "games"). This is the error: "Operation must use an updateable query."
I have been following a tutorial in a book Vb 2005 Jumpstart Ch 4..Anyway I have followed the books code exactly and the program runs.It connects to Amazons web service and allows the user to search and display books, the application also allows the user to save the titles that they wish by clicking an Add Title button, when the user does this the current focus title is saved to the database and can be viewed off line.When I hit the add title the record gets saved as I can hit the catalog button which opens a new form with a datagrid that has all the titles I just saved in it!! But when I close the app and run it again the catalog is gone?? back to no records again?Now ive never worked with SQL databases before and this is me just having a go at .Net so I have no idea whats wrong or where to look.[code]
I've been having a problem adding a record to an Access database using datasets and da.update etc. I'm trying to create a simple program that displays the records of a database table in a series of text boxes. I've managed to get my next and previous buttons working correctly and my update button works correctly too. The problem occurs when I try to add a new record. I keep getting a "Syntax error in INSERT INTO statement" whenever I click my add button.
I'm following the sops from msdn on how to create a database from scratch. I would now like to programmatically add a single record via a command button?
I m trying to make a simeple project in visual basic 2005 using visual studio 2005 sp1.
For isolating the problem i have just created project with a single form.
The form contains a masked text box (mask allows numeric(5 digits) int32 value )and a button named FIND.
Then i clicked on add a new data source wizard and added a data source (Microsoft.Jet.OLEDB.4.0 provider) and a microsoft access database (Library Management Project.mdb) . the database has a 5 digit primary key column named -BOOK_ID
i selected no when asked whether i want to add the local database to the output directory and modify connection.
then selected yes when asked whether i want to save the connection string.
then selected everythng when asked what database objects i want to add to dataset.
What i want the project to do when a person enters 5 digit integer value in masked text box and clicks the button FIND
a message should be displayed telling whether this value matches any of the primary key values.
so i wrote under the button click event
Dim DataRow As Library_Management_ProjectDataSet.BookDetailsRow
Hi how's it going. In the middle of coding a banking application for a project. Part of it involves mortgage interest repayments. Was wondering if there was any way of logging the time a new record was created and added to the database and then adding interest to the balance owed periodically every 30 days..
I've been using the following method to store the primary key value of whatever record is being referenced. I would then call the Content.Id method to retrieve that value for sql commands.
My question is - is this good practice? One other told me I should make a session item instead.
This is my ContentDA class
Public Shared Property Id() As Integer Get Return _ContentId
The coding will works if the data type of my primary key is integer.but when i try to change the primary key in string data type i cant delete oe edit. below is my coding for that 2 button that is working.[code]..
I have two tables Products and Categories with a many to many relationship. I am trying to copy the categories linked to one product (OriginalProduct) to another product (newProduct). The problem is when I execute the SaveChanges() method, I not only get the records in my linking table, but it also creates another copy of the categories in the categories table. I've tried this in many ways but here are the last couple that I've attempted:
' Copy Product/Categories For Each oneProdCategory In OriginalProduct.Categories Dim relatedCategory = _productContext.GetObjectByKey(New EntityKey ("ProductInfoEntities.Categories", "RecordId", oneProdCategory.RecordId))
I am trying to check a record in database before inerting a new record here is my code but problem is when i enter a names first alphabet it imediatly populate massage. i want to check it after entering whole name
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress Try Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &
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]
i am using vb.net2010 and mssql as my database. what i want to do is when i open the form, the database will auto increment the student id and show it on the text box.
