I'm using the code from [url].... for adding a record to the database.It says when using a commandbuilder I should not get the error message:
Update requires a valid InsertCommand when passed DataRow collection with new rows.
However when I do the update I still get the error message. [code]...
Module Code
Imports System.Data.OleDb
Module modConnections
Public myConn As New OleDbConnection
Public myCmd As New OleDbCommand
Public MyDr As OleDbDataReader
[Code]...
Module Code
Imports System.Data.OleDb
Module modConnections
Public myConn As New OleDbConnection
Public myCmd As New OleDbCommand
Public MyDr As OleDbDataReader
[code]....
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
[code].....
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.
[code]...
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
[code].....
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?
View 1 Repliesread a lot about DataAdapter, DataTable ,.. to reach to this code, in the Save Button:
'insert new row
ds.Tables("Employees").Rows.Add(ENumTxt.Text, ENameTxt.Text, EPosTxt.Text,
EAgeTxt.Text, ESalTxt.Text, EPhonTxt.Text, EAdrsTxt.Text)
'save changes
ds.AcceptChanges()
[Code]...
In run time, i got the same error message for both cases "Syntax error in INSERT INTO statement"
Imports System.Data
Imports System.Data.OleDb
Public Class frmRegistration
[code].....
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."
understand why the first line in this code allows an empty valuebut the second line doesnt?
HTML
dsNewRow.Item("AddressDisplay") = subjectaddtxt.Text
dsNewRow.Item("MLSNUM") = Me.subj_mls_txt.Text
[code].....
[code]There's my code to add, was working, not sure if I accidently changed something but it doesn't work now
View 3 RepliesI 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]
View 6 RepliesI'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.
[Code]...
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.
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?
View 3 RepliesHi 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..
View 3 RepliesI want to record from listbox with the following code into a sql database.But,it's gives me error.Here is my code.I show error line the following code.[code]
View 4 Replieswith an error message that I am getting when trying to retrieved a record from an MS Access database. I am using VB2005My code is brakinh on the following line of {"Object reference not set to an instance of an object."}Here the code that I am using:
Private Sub RadioSrCecc_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioSrCecc.CheckedChanged
Dim Stores_string As String = ""
[code].....
When i Click on Add New Record. Then it will auto generate a ID example like 00001. The program will then open the other Fields. After i fill up the form and Click on Submit. It shows the error that my ID is NULL which its not when i look it clearly shows in the form i filled up before submitting.The generated ID on the text box doesn't seem to be forwarded to the database.
ID Data type set in the Database is Numeric(5,0)
VB 2010 Express using the Built in Database
Add New Record Button [VB Behind][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))
[code]....
I'm testing my program, which uses an access database, and it works just fine on:
Windows XP with .Net Framework 2.0 sp2
Windows XP with .Net Framework 3.0 sp2
Windows XP with .Net Framework 3.5 sp1
But in Windows 7 with .Net Framework 3.5.1 I'm getting an error in the ExecuteNonQuery() line when updating a record in the database.
The code I use is:
Dim con As OleDbConnection
Dim cmd As OleDbCommand
Dim cGebruiker, cWachtwoord As String
[code]....
how to show error msg in literal if no record found in database according to the text entered in textbox1 and textbox2 else if show record in gridview if the text entered in textbox1 and textbox2 will be found in database ...
View 1 Repliesuse the following code to create a database in ms access
Code:
'reference: Microsoft ActiveX Data Objects 2.8 Library
'reference: Microsoft ADO Ext. 2.8 for DDL and Security
[code].....
I've been messing around trying to get an INSERT statement to work, and because of this, it has created lots of records in my database that I dont need or want.
The problem is, when I open up the table by right clicking on it in the database explorer and selecting "Show table data", I click on the record I want to delete and the following error comes up in a message box[code]...
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=" &
[CODE]...
I am trying to add an Access DataBase to my program as a datasource for a project.I am building in VB 2008. When I select which tables I would like to import I am getting an error that reads "Failed to add relation(s). Unexpected Error."I cheked my Database and my programming code NO Errors where found in there.Im working on windows Vista (maby a problem
View 1 RepliesThe Error I am getting while adding a group to reporting services which exist in the database
"The user or Group domaingroupname is not recognized. (rsUnknownUserName)"
When I'm trying to update or remove record from database I'm getting this error:
Syntax error (comma) in query expression 'Ime='Blagojce', Prezime='', Adresa='', Grad='', Telefonski_br='( ) -', Fax='( ) -', e_mail='''
Here is my connection string:
command.CommandText = "DELETE * FROM podatoci WHERE Ime='" & ime & "', Prezime='" & prezime & "', Adresa='" & adresa & "', Grad='" & grad & "', Telefonski_br='" & broj & "', Fax='" & fax & "', e_mail='" & email & "'"
where ime, prezime and so on are ListView selected items.
While I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.