Can't Seem To Save Data In The Database When Updating A Record?
May 20, 2009
I can't seem to save data in the database when updating a record. The record appears to be updated and even displays the new record on my form but as soon as I close and restart the program the old record is back and no changes are made to the database. Is there something im missing here ?
If CN2.State = ConnectionState.Open Then
Dim Comand As New SqlCeCommand("SELECT * From Incentives Where IncentiveCode = '" & TxtCode.Text & "'", CN2)
Dim rs As SqlCeResultSet
rs = Comand.ExecuteResultSet(ResultSetOptions.Sensitive + ResultSetOptions.Updatable)
If rs.Read Then
[Code]...
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Jun 12, 2011
update on vb.net 2008!It's quite a simple code but when it comes to it tells me Syntax error in Update.The problem is where i highlited.
[Code]...
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Mar 13, 2012
I am basically trying to retreive a record from the database where CardNo is the text in txtCardNo.However it doesnt work it keeps seying datatable cannot be converted to dataset.row..[code]
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Jul 21, 2009
I am using vb.net console application. I want to update record in database without using primary key in a database.
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Dec 3, 2011
I use This Code To Save Data in Table First I delete record Then Insert record
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Mar 11, 2010
On my form I have a datagridview which is bound to a 'Supplier' table in Access 2003. Once I click on a record on the DataGridView, textboxes below which are also bound to the same source are automatically populated with the relevant data. What I want is when I click update, that the records in the database are updated as well as the dataset but what happens is that the dataset is updated, I invoke the tableadapater.update method but no permanent changes are made to the database.
Below is the code attached to the 'Edit Supplier' command button.
Private Sub cmdEditSupplier_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdEditSupplier.Click
Me.SupplierTableAdapter.Update(QuoteDataSet.Supplier)
[Code].....
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Apr 25, 2012
below is my piece of code where I click on "Edit button" then retrieve the data from access database so that I edit them on a form.
This is what I get when I click on edit: InvalidCastException was unhandled and highlights the line below The UserID contain Alphanumeric characters.
'check for the selected item in list
If lvUsersList.SelectedItems.Count > 0 Then
If Me.lvUsersList.SelectedItems.Count > 0 Then
[Code].....
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Apr 28, 2009
I am trying to update a table based on row selected in a grid (C1TrueDBGrid1.Columns(1).Value), but I am getting the following error:
Update unable to find TableMapping['Table'] or Data Table 'Table'
Code:
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=/DataDirectory/AOPT2002org.mdb;Persist Security Info=True;Jet OLEDB:Database Password=testaopupdate" Dim objConnection As New
[Code]....
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Jun 9, 2010
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]....
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Feb 26, 2009
This is the form I'm having problems with. As you can see I've created a tab interface which is working. There are five text boxes on it which are binded to the Staff table in the database. When the tab is changed, the binding is changed to a new field. However, unfortunately, when a new record is selected, the data bindings do not update, and instead, the first record is always being used. We suspect the problem may be coming from the fact that there is code to unbind from the text box and rebind it again. This is the code I'm talking about...
Private Sub TabCheck()
If TabState = 1 Then
pnlTabs.BackgroundImage = My.Resources.tabs1
txtBox1.Visible = True
txtBox2.Visible = True
[Code] .....
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Nov 10, 2011
i need some function like adodb.recordset on vb6.0 on vb.net but seem i cant manipulate it like recordset because i want to manipulate in retrieving,inserting and updating my record on just only how call on the database im using mysql database..
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Jan 21, 2009
there is a tab control system. It relies on only five text boxes, and their bindings change when the tab is changed The relevant information is displayed. However, if I navigate to a different record...You can see that the same information is displayed in the tab control text boxes, and not the employee's details I just selected in the data grid or the navigation. How can I fix this? I'm not sure what's gone wrong here. Here's the code that changes the text boxes upon changing tab...
Private Sub TabCheck()
If TabState = 1 Then
pnlTabs.BackgroundImage = My.Resources.tabs1
[code]....
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Jun 16, 2012
I have designed a form which contains a listview(to see the list records) and textboxes (used for adding or updating).an already save record into table using this
cmd.Connection = con
cmd.CommandText = "INSERT INTO student_info_tbl VALUES('" & txtUserId.Text & "','" & txtFirstName.Text & "','" & txtMiddleName.Text & "','" & txtLastName.Text _
[code].....
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Jul 3, 2011
Here is the code i am using to save record from data grid to db
Try
For r = 0 To DataGridView1.RowCount - 2 ' Why RowCount-2?
For Each cell As DataGridViewCell In DataGridView1.Rows(r).Cells
[Code]......
Error is
"Conversion Form type dbnull to Type date is not valid" Please view the attached image what should i do to remove this error.
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Nov 15, 2011
My query is i want to save record from an excel sheet to my Database Table.
But i dont want to insert the Excel sheet as a whole rather i want to insert the record in my database table Row wise.Inserting the records is not the only thing but my major issue is i want to check and compare the Primary Key column of my Table with the Column in my Excel.
Suppose Table1 is my Sql Database Table,and RegistrationNo is the Primary Key Column.Similarly there is also a column of Registration Number in my Excel Sheet.
Now before inserting each record the RegistrationNo column should be compared.If the a registrationNo in the excel sheet say RegistrationNo 112 is already present in the table then it should not Insert the record and if its not present then it should insert.
Also the other issue is the number of columns in my Database table are more than the number of columns in my excel Sheet.So the columns that are not present in the excel sheet should be set to NULL while inserting the record in the Table.
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Apr 27, 2010
Having problem in updating an existing record. An error occurs "Data Type Mismatch in Criteria Expression"
Private Sub ToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ToolStripButton1.Click
Dim myBuilder As OleDb.OleDbCommandBuilder = New OleDb.OleDbCommandBuilder(dataAdapter)
[code].....
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Aug 16, 2011
I've seen similar problems posted on this and other boards, typically with a bunch of code checking before its realised that that database itself is being copied to another directory and run from there. Apparently this is managed via the database properties, copy to output directory settings. In my case I have tried all three options, with no change in result. After "saving", inspection of the actual database via the server explorer shows no changes have actually been committed.
I am getting to a point where I need to start entering large amounts of data into the app and have at actually save to the db for deeper testing.
I noticed this behavious first when using an .accdb and it has persisted through my exploration of SQL(.mdf)
db Output Option Selected / Result
always copy... data changes do not persist between debug runs and is not entered into actual database
copy if newer... data changes do persist between debug runs but is not entered into actual database (checked via server explorer)
Do Not Copy... generates the below Error on execution
System.Data.SqlClient.SqlException was unhandled
Message=An attempt to attach an auto-named database for file C:UsersXXXDesktopVisual Basic ProjectsSQLtestWindowsApplication4 - CopyWindowsApplication4inDebugMyDatabase.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
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Feb 3, 2012
Basically I want to be able to save any data I enter into my data grid / dataset ermanently , so when i close the program or restart it the data I previously entered within the grid will be present.This is what I have so far
BindingContext(CustomersDs, "Customers").EndCurrentEdit()
OleDbDataAdapter1.Update(CustomersDs) is called Shop.mdb )
[code].....
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Apr 8, 2011
In my form i have a datagrid view and two textbox the textbox is bind with the datagrid..now when i click the data in the datagrid the data will go to the textbox (that's i want to happen) but when i click the update button and check my database it doesn't change.. i use ExecuteNonQuery to update my data.[code]...
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Oct 6, 2011
I'm sure im just making a simple mistake some place but i just cant find it. I have datatable which I can and can make changes, save back to the database just fine. But if I reload the data after updating, no data is retrieved from the database. But if I stop debugging completely and then start again, it loads just fine...until i call Update.
Here is some code I am using for testing purposes.
Private myDataSet As New DataSet
Private conn As MySqlClient.MySqlConnection
Dim myDataAdapter As New MySqlClient.MySqlDataAdapter
[Code]....
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Mar 9, 2010
I'm Using vb 2008 and an access DB.I have 2 tables in the DB which is transaction and products.When a Customer Buy product the transaction will record and the stock of that product will deduct accdg to the quantity bought by the customer. Myproblem is products table didn't update. Stock of that product still didn't change.
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Jan 22, 2010
I am working on a project that stores data on animals. I am trying to make updates to data already stored there, through inputs on a VB form. A form where all the data is populating the fields shows up and the user can change/update any field. Once they are finished, they click update and the DB is supposed to reflect those changes (Theoretically)However, I wrote the code to do that, but when it runs nothing in the database is changed and nothing gets done, as it seems. No errors appear and nothing goes wrong with the program. It just doesnt change the data in the db.
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Apr 24, 2010
I am working on a project that stores data on animals. I am trying to make updates to data already stored there, through inputs on a VB form. A form where all the data is populating the fields shows up and the user can change/update any field. Once they are finished, they click update and the DB is supposed to reflect those changes (Theoretically)
However, I wrote the code to do that, but when it runs nothing in the database is changed and nothing gets done, as it seems. No errors appear and nothing goes wrong with the program. It just doesnt change the data in the db.
Here is the code updating the database.
If txtNewID.Text = "" Or cmbRegion.Text = "" Or txtWombatName.Text = "" Or cmbGender.Text = "" Or txtAge.Text = "" Or txtWeight.Text = "" Or txtLength.Text = "" Or txtCommunity.Text = "" Or txtDescription.Text = "" Then
MsgBox("Please fill in all required fields.", , "ERROR")
Else
[code]....
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Apr 14, 2009
I have two forms in my program, Form1 has ListBox which contains names from the Database.Form2, has textbox and add button to get a new name from the user.but when I click on add button.. i return to Form1 to view the names in the listbox by clicking on view button: ALL NAMES ARE DISPLAYED WITHOUT THE NEW NAME.when I close my program and click on View button all names including the new name that was entered before are displayed ! is there a way to display everything in the database without closing the program??I need a way to refresh or something.
Form1:
Imports System.Data.OleDb
Public Class Form1
Dim ds As New DataSet()
[code]....
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Jul 29, 2011
My form just isn't updating the row in the database: Here's my code:
Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
If Request.QueryString("a") = "edit" Then
Dim CategoryText As String = lstCategory.SelectedItem.Text
Dim conn As New SqlConnection("Data Source=.SQLEXPRESS; Initial Catalog=LogansArchive; Integrated Security=True;")
[Code] .....
I've never used nested SELECTs in SQL before so I'm not sure if I did it right. Aside from that, this is all stuff I've done before so I'm relatively sure that it's all correct. Finally, there are no errors being reported when I debug, although the updates don't seem to be coming through from the text fields (txtContent.Text isn't changing to reflect the new value).
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Apr 30, 2009
I took a break from this program since I couldn't get it going. I just started it again yesterday and finally got it to pull data from the database to show past patient appointments in the appointment scheduler. Now I just need it to take the data from the pop up window and update the database with it so it's there after you close the program. I want it to update the EyeBase dataset and write it to the DB.
Here is the code so far:
Public Class Form1
Public Structure ScheduleOwner
Dim _index As String
Dim _description As String
Public Sub New(ByVal row As DataRow)
[Code] .....
Here is the form that pops up to enter patient information. I think I got it, I used this code:
Me.AppointmentTableAdapter1.Update(Me.TestAppointmentDataBaseDataSet1.Appointment)
And I can change things, click a save button, close it, then re-open to see the changes I made. New problem is when I try creating an appointment from scratch, I get an error saying "Column 'AppID' does not allow nulls." AppID is a column in the DB that I use to number the appointments. This seems like it's looking for a value when you create the appointment but I don't want it to. How can I have it ignore that?
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Jan 15, 2012
when i add the record it saves and returns the save message box as it should and is viewable in the database where it saves to, but it is not viewable in the text boxes when looking back at the form until i close program and re open it, then i can see the record stored in the database, it just wont update the form,[code]
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Feb 9, 2012
[code]The above code does not insert data into table. Please fix this issue.Tell me the proper and most widely used way of Inserting, Updating & Deleteing Data in Database.
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Mar 17, 2012
I'm building a Stock control system and what i have is a Location Table. What i want to do is move stock between locations. Obviously I don't want to have the stock being moved to the same location. So i was wondering If there was a way to Create an SQL string that would get all of the locations except for the one that was selected.
[code]...
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Dec 8, 2009
I'm trying to test some stuff out, like adding employees and stuff like that.
Now it used to run on an Access database, but I've made the jump to MySQL.
Now to add an employee I use this code
Private Sub btnOpslaanWerknemer_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOpslaanWerknemer.Click
Try
[Code].....
now I get the following error: "Error: MySQL.Data - You have an error in your SQL syntax; check manual that corresponds with your MySQL server version for the right syntax to use near '?,?,?,?)' at line 1.
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