I am trying to add records to a SQL database from a form in Visual Basic. When I first started my project, I was using a MSAccess database, but decided to switch to a SQL database. I have updated all my data connections and everything seems to be working fine. I can view the database from the project, even run parameterized searches with no problem.
WHen I try to add a record, there is the problem. I can add information, get a "update sucessful" message, and no information is added to the database. if I hit the button again, it even tells me the event failed because there is already matching information in the database. here is the code i am using to update the database.
Private Sub BtnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnAdd.Click
'' takes the info entered on the screen and inputs it into the Inventory Table
Dim newRow As AddCupDataSource.TbInventoryRow = Me.AddCupDataSource.TbInventory.NewRow()
com=new oledbcommand("Select tablename SET Roll=@Roll or Name=@Name or Age=@Age WHERE Roll=@Roll or Name=@Name or Age=@Age") command.Parameters.AddWithValue("@Name", Combobox1.text) command.Parameters.AddWithValue("@Age", textbox1.text) command.Parameters.AddWithValue("@Roll", Combobox2.text)
Is this a correct syntax of updating an access database using parameters?
I have ALWAYS used the SQLDataSource to update my records in my SQL Server 2005 database, so i am not really sure how this would be done in normal code. I am using VB.NET but if you are a C# developer and want to show me some code that is more than welcome as well.
I am using ASP.NET 3.5.My user will see a page with 5 Text boxes with their contact details in. Those details I will get from a SQL Server DB and when they go and change the text in the text box and click submit, it must then save the changes.
This is very easy with the SQLDataSource but how can i code this myself?
"I've wrote a code that accesses data from MS SQL server in DATAGRIDVIEW in VB.NET.the problem is whenever i save the changes back to the database, changes are not reflected back
have a collection that stores structures of data. my problem is that, after i have populated my collection, i do not know how i could change or update the data stored in the collection.my structure of data looks like this:
Structure tType1 Dim ID as Integer Dim QTY as Integer
I have a VS 2005 VB.NET Windows forms application that is exhibiting very strange behavior. I can add controls to any of my forms and see them at design time, however when I run the application, it resorts to "old" copies of the forms without the new modifications. Also, the application does not seem to be firiing the correct events - when I put a break on the Form_Load event of my main form - it never fires the event when the application runs. If I change the project settings to start with a new form - it does not recognize the change. Something strange is going on and I am quite frsutrated trying to figure it out.
I have a for loop going through customers and for each customer a update a list of contacts. If there is an error updating the contacts I want it to move on to the next customer and if there is an error in the customer update I want it to move on to the next customer. At the moment if I get an error it bombs out of the routine. Here is a simple example:-
For iRows = 0 to oledscustomers.tables(0).rows.count - 1 For iContactRows = 0 to oledscontacts.tables(0).rows.count - 1 'make some changes in here. Next Update Contact Table 'Make changes to customer tables and save them. Next
If I get errors in the contact for loop or the customer loop it comes out of the routine altogether. I just want it to either continue to the next contact or customer.
I have noob question. I made a dataset of a sql express 2005 database using the designer. So it's a typed dataset. Then I declare some tableadapters and fill them.Now I do this to add a record to my dataset:
Private Function SaveOrder(ByVal controlenummer As Integer, ByVal PK_BaanID As Integer, ByVal starttime As DateTime, ByVal stoptime As DateTime) As Integer Dim orderRow = dsIntveen.tblOrder.NewtblOrderRow orderRow.Controlenummer = controlenummer orderRow.FK_Baan = PK_BaanID
I'd like to know which would be the best way to deploy updates of a software developed in vb.NET, using Windows Installer. What do i have to change? Upgrade code? or Product code?
There is something wrong with my codes. I don't know why it isn't updating the records.If I activated the line dt.Rows.Add(newrow) it will just create an error on da.update(dt) line QuoteThe changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again.But if I deactivate that line, no errors will be occurred but the record won't update.
Here is my code
Dim dt As New DataTable Dim ds As New DataSet ds.Tables.Add(dt) Dim da As New OleDbDataAdapter
I have the following sql query that on debugging contains what looks like the right thing however the database is not being updated, but the code runs fine:
con.Open() For i = 8 To ds.Tables("AddressBook").Columns.Count - 1 'Counts the amount of columns in the database
i am haveing problems updateing my customer details i was wondering if i could use the code i have for add and change it to update maby insted of useing the INSERT I could use a UPDATE or something anyway
Public Sub updateWithNewOrders(ByVal aOrder As Order) Dim cmd4 As New OleDbCommand("INSERT INTO ORDER (OrderID,CustomerID,OrderTotal,ODate,EmployeeId) VALUES (?, ?,?,?,?)", con)
I have an field which i have to update based on the selection of listbox.When i select listbox based on that when i update my fiels it should be updated
Dim cnstring As String cnString = "Provider=Microsoft.Jet.OLEDB.4.0;Persist Security Info=False;Data Source=AirLine.mdb" Dim sqlQ As String = "SELECT NoofCoachseatsAvailable,NoofCoachSeatssold FROM FlightDetails WHERE flightname='" & s & "' " 'Create connection
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Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information. Is my selection (Based on Listbox selection) is the wrong part here.
the problem is when I click the 'save button' and then exit. Then open again, the total records still unchanged the code used
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click Validate() Supplier_s_informationBindingSource.EndEdit() Supplier_s_informationTableAdapter.Update(Bookster_databaseDataSet1._Supplier_s_information) End Sub
then I try to put Me.
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click Validate() Supplier_s_informationBindingSource.EndEdit() Me.Supplier_s_informationTableAdapter.Update(Me.Bookster_databaseDataSet1._Supplier_s_information) End Sub
I don't know if make a difference but how to update the database also, what code should I put?
i have published my website...its a dynamic site..so i have database connectivity..now i want to make an application in VB to update my database using my application..i mean i do not want to login to the site and update my database rather update it using my application..i want to connect my application to the database of the published site and update it from anywhere i want using the application...is it possible??
How can i do it??Please point me to the right direction...its urgent.
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.
I am a newbee to the programming. So please guide me if i am wrong. up to binding of the datasource my programe working perfect but during save button it gives error.(Value can not be null. Parameter name : daatTable)
I'm having a database, using GridView I retrieve the data into my WEB application.Then I set the rows to editable (not sure if it is fully completed) and when I edit some cells I want to update the GridView AND the database behind.When I click on 'edit' then the button is changed to update. I get some unhandled exception. I don't expect anything else since I didn't put any code in the update methods like RowCommand, RowUpdating, RowUpdated, RowDataBound.
teaching myself (an oldfashioned VBA programmer) VB2010 by converting an existing Access 2003 application to VB2010. I can read my data from an Access database into a datagridview:
I would like to know if how can I update my database using oledbCommandBuilder below here is my code:
'save changes made and store it to our database newDataRow = ds.Tables("employeeTable").NewRow() newDataRow.Item(0) = comboPosition.Text
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The error that I get is "Syntax error in INSERT INTO statement." It almost took me 1 day but I cant configure how it still become error. below here is the part where the error came from
im having problems saving and and updating my database. created in the database explorer.Run thorugh what ive done, created tables saved the job, imported the database dragged items on to screen.
Ive looked at my xsd file and Update and delete comands havent been set, how do i set them and is there a default to preset them when ive i create new databases. its really great you helped out..
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 )
Imports System.Data.OleDb Public Class Form1 Dim con As String = "Provider=Microsoft.Ace.OLEDB.12.0;" & _
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I keep getting the error that :'No value given for one or more required parameters' when trying to update yet I see nothing wrong with the code...how can I eliminate this error?
I saw this code in a book but unfortunately, I have no idea how to run it. In what event handler do I place the code? Will the Insert, Update and Delete be called at once? How do I supply the value of the "paramater_Old"?
I am using Windows form such that everything revolves around the values of textboxes on the form.
Imports System.Data.SqlClient Public Class Form1 Dim strConn As String = "Data Source= .SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
I'm having an issue with using code to update a program that's trying to save data to a database. The problem is where I have found many answers on restricting the number of rows updated. All data that I have is on a single row in the database. Here's the code that's absolu
On my form I have a combo box that is bound to this table with Species_ID as the Value Member. When I select a value from the combo box I want to update 3 labels with data from the Species_ID row corresponding to that value.
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]
