Adding Records On Database - Creating Update And Delete Button?
Mar 10, 2012
I have used this form to add new records on my database(ms access) in my database I have a column name 'ID' which is my primary key 'ID' is set as auto number. Now I am having a trouble on creating my update and delete button it's always saying "cannot be delete/update"
Here's my code on add, update and delete
Public Sub SaveRecord()
Dim dbConn As OleDbConnection
Dim dbInsert As New OleDbCommand
Dim str1, str2, str3, str4, str5, str6, str7, str8, str9 As String
Note my add is working perfectly fine. I just can find the error on my delete and update. Also I have used this to view it to my datagrid I don't know if its the right thing but it's working fine too.
'declared dbpath globally'
Dim dbPath As String = "Provider=Microsoft.Jet.Oledb.4.0; Data Source=../VG.mdb;Persist Security Info=False"
Another thing is how to code each textbox and combobox to bind it to my records so that when I click on the datagridview each column will be distributed on each respective textbox.
Ive created a form to add/delete/update records in a database ,but when i try and open the frm i get a NullReferenceExceptionUnhandled error, below is my code, i cannot for the life of me see where i've gone wrong, but maybe someone else can spot it?[code]
I have problems with the updating and deleting of records in database. I'm using ObjectDataSource and the GridView to display the results in the database. Below is the codes for the update and delete (in the DAL (data access layer). BTW, I'm doing 3 tier architecture in VB.
'update the records accordingly in the database. Public Function UpdateBooks(ByVal title As String, ByVal borrowDate As String, ByVal dueDate As String, ByVal NameBorrower As String, ByVal book_id As Integer) As Integer Dim connectionString As String = My.Settings.dbConnection [Code] .....
I don't know why, but every time I try to update (by clicking on the update button), every thing is not updated, the page would refresh then the records still remain the same in the GridView. As for delete, when I clicked on the 'delete' button, the record is not deleted, it still remains there.
These are the codes in the (BLL (business logic layer)): Public Function getUpdateBooks(ByVal title As String, ByVal borrowDate As String, ByVal dueDate As String, ByVal NameBorrower As String, ByVal book_id As Integer) As Integer Dim ds As Integer = UserDA.UpdateBooks(title, borrowDate, dueDate, NameBorrower, book_id) Return ds [Code] .....
I display my records using datagridview...I have also Save button which is intended to update any changes I make via the datagridview.I got this error whenever I type something in the address column "Update requires a valid UpdateCommand when passed DataRow collection with modified rows."[code]What code do I put so that whenever I highlight a row and click delete button or press delete key selected records will be deleted from datagridview as well as my database will be updated from any deletion?
How do I insert,update,and delete records in vb.net 2008 from a Access 2007 database?Really, I figured out how to add records - but I cannot delete or update records. Any pointers, website tutorials, etc?Also, I am binding the database table to Listbox which is working, but I need to update the listbox with deletion and update changes too...
i have a simple application which can create/update/delete/search records using Access database. If i add a record, save it, then close the application and run it again and search for that record, it appears. However, when i write some code to my application, nothing to do with the search function, and i run the application the record is not found. For example i added a button to clear the textfields, and when i ran the application the records i have added earlier were not found.
I am pulling information out of my Access Database and reading to a webpage. I need to add a update, delete, and email function to this page. I am trying to do this with the selection of a check box and buttons for each one. But I am unable to get the delete to do anything but redirect back to the orignal page. For the update I want to be able to pull the info in text boxes and just change the info and click update and it gets changed. I also want to be able to pull their email from the database and put it into a text box to be able to email right from the page. Code for show page and delete page below.
I have a datatable populated from an SQL Server 2008 database table. I created a DataAdapter with a commandbuilder to manage the updating, inserting, and deleting of records. The Updating and Inserting work as expected. However, Delete does not. The code runs through just fine without any errors. The number of records in the datatable after the row is deleted even reflects the deletion. The DataAdapter.Update works fine without any exceptions. But when checking the actual table in the SQL DB the deleted record is still there.Here are the parts of my code that deal with this table.
I'm creating a project using Microsoft Access 2007 & Visual Basic 2008.I have two tables in my database, Staff and Training Attended. The Training Attended records of Staff are displayed in datagridview, residing in a different form from the Staff detailsWhat my program does is, it will display all of the Staff's list of Training Attended in datagridview once I click the button in Staff form. I've succeeded in retrieving the records. using bindingsource.filterThe problem is that I can't insert/update/delete records in the Training Attended datagridview. it keep giving me this error: Update requires a valid UpdateCommand when passed DataRow collection with modified rows.
I'm creating an application that adds and deletes records from a microsoft access database. The language I'm using is VB2008. I am importing the database through a wizard. I can add records and delete records, but I cannot delete a newly added record without closing the form first. When i reopen the form, I can delete the record. Here is how I have my database setup:
'Bind user info to the controls. AUSERDataSet = New BulldogUsersDataSet AUSERTableAdapter = New BulldogUsersDataSetTableAdapters.UsersTableAdapter AUSERTableAdapter.Fill(AUSERDataSet.Users) ' Setup the binding source. AUSERBindingSource = New BindingSource
how to do it, but the tutorial is not applicable on the program that I wish to do. The tutorial tells you to add 4 navigation buttons so that you can navigate the database(first, last, back, and forward). Then an update and delete button. But if this is what I will do, it would take 10 years to navigate the database and update a record. Now, what I want to do is just for the user to input a unique ID and click search button(which I have already done). Then the update would be easier. How can I update or delete a record using this method?
I have a project that I am working on that requires me to delete records from the database if they are atleast 3 years old.I have something like this in DB2 SQL to get the date:
SELECT * FROM tableA WHERE ADD_DATE < CHAR(CURRENT DATE-3 YEARS)
ADD_DATE is stored as Characters in my system, this is why I am converting I know it is also possible to get the date and format it in VB.net which is the language I am using to call the SQL statements.My question is whether it would be faster/better to get the date and perform the conversion inside the SELECT in SQL or would it be better to get the current date and convert it in VB.net and then use that date in the SQL statement. I'm thinking VB.net would be better because there are thousands of records that must be compared. I should be able to set it up in VB so that it only retrieves the date and converts it once but I am not sure what kind of performance hit each takes from these statements.
I am trying to Insert/Delete records in a MSSQL database based on if a checkbox is checked or unchecked. The checkbox is an item template in a datagrid, I can check/uncheck the checkbox but it doesn't do an insert or delete. Here is my code:
But then I get the error that the control chkmap has not been declared. I am confused as to how this needs to be declared, do I set a variable to the FindControl("chkmap") and then set it as variable.checked = true ?
I need help with adding a record to a database.I have a database with multiple tables. How do I add a new record to one of the tables without using the BindingNavigator.Lets say the table's name is tblDetails and the fields are:NameSurnameCellAddressI have a number of text boxes on my form:txtNametxtSurnametxtCelltxtAddressI want to add the details from the text files to the table and a new record.
I have been trying for a month to get a row added to an Access database and can not do it. I have the databindings all set and can select different records, but can not add a new one. I have tried BindingSource.AddNew.row() but can't figure out how to add data to the new row, nor does it show in the database.
I have tried
Dim ds As New myDataSet '<---Change this to the dataset name on your form Dim dr As DataRow dr = ds.Tables("Students").NewRow
But that doesn't do anything at all. No data added, no errors. I have tried updating a datagrid to be told it can't be updated when bound. I look on google and nothing seems to relate to adding data to an access database when bound to the project through the datasource wizard.
I have the following code which I hoped added a row to my DataGridView and also a record to my database. It does the first part, but not the second. Dim row As DataRow = Me.CCLogDataSet.tblLog.NewRow() row("cc_log_contract") = Me.txt_Log_Add_Contract.Text row("cc_log_registration") = Me.mtb_Log_Add_Registration.Text.ToUpper() row("cc_log_milage") = Me.txt_Log_Add_Milage.Text [Code] ..... It seems to be storing the data in memory? As the data in the DataGridView is persistant, even after a Relaunch of the application. However, why I query the database, there are no records in it.
I'm trying to add a record through access. Below is my code. My problem is that when I add a new record, it adds to the database fine, and goes back to the first record like it should, but when I then scroll through using the BtnNext (button), it replaces the last record with the first record for some reason. This is the UI of it [URL]. A bit of further explanation, I'll have 3 records, IDs 1,2,3 respectively. I go to add another (with its ID as 4). When it's added, the program displays ID 1 as it should. It then goes 2 then 3, but instead of 4 as the next one, it displays 1 again. So 1231.
Here's the Public Class ViewStudent Dim con As New OleDb.OleDbConnection Dim dbProvider As String Dim dbSource As String Dim ds As New DataSet [Code] .....
I am using OLEDBConnection and OLEDBDataAdapter and connected to the MS-Access databasehow can i add the textbox value to the table in database on a button click and want to display it in datagridview??
I am developing an application in vb and access my sql query in access please have a look.
str = "insert into details values('" & username & "','" & CDate(date1) & "','" & time & "','" & PrinterName & "','" & noofpages & "','" & _ Message.ToString & "') WHERE not exists (select * from details where Date1 = " & CDate(date1) & " And Time = '" & time & "')"
I was trying to check the database before adding the records For some reason its not working Query input must contain at least one table or query Is exists allowed in access or is there any other keywords in access?