I have a database with about 10 records - each with their own ID. I'm trying to add a new record, and to do this I decided to have a text box on my application form show what the next ID will be. Here's the code I am using:
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
'get EmployeeID from the textbox:
Dim intEmployeeID As Int16 = Val(txtEmployeeID.Text) + 1
'store the emlpoyee
[code]....
The 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.How would I go about finding the maximum ID in the database and then adding 1 to it so I can display it in the text box?
The program is currently trying to pull information from three different database tables and compiling the information onto one screen, to do this i am using three different connections and a function to handle the data at each stage. The issue is as my code hits PageLoadStage of "2" and runs the QueryDatabase() Function i am encountering an error of: "OleDB exception unhandled: No value given for one or more of the required parameters." This occurs on line 15 of the first code snippet. Can anyone explain this and/or identify any code issues if that is the cause.
I have been coding an application for a LeaderBoard for a game. I have all the Login sorted using Mysql and even have all the Account infomation displaying in lables etc. for account info form. Now I am trying to UPDATE information and this is how I was trying to do this...
Dim UpdateInfo As New MySqlDataAdapter Dim mycommand As New MySqlCommand() Dim mydata As MySqlDataReader Dim query = "UPDATE Login SET Pword = '" + UpdateTxtBox.Text + "' WHERE Uname = " + Login.Uname mycommand.Connection = conn mycommand.CommandText = query UpdateInfo.SelectCommand = mycommand mydata = mycommand.ExecuteReader()
But comes back with an Error saying... Unknown column 'username here' in 'where clause'. Now the username is in the database as I have just logged in with it and I am taking it I have the Query wrong somewhere.
what i'm working on is, i have VB with a loaded Access DB, and i'm using a query to display the information, in a list box and in indivual labels. i have it so it will allow new entries to be made, however i can't figure out the exact code to get it to update to the program the only code i currently am able to show is this since everything is basically being done through access
Dim rsResult as new ADODB.Recordset Do While Not rsResult.EOF ...........FILLING mshflexgrid.
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During MoveNext, i am getting this error, -21474667259 Insufficient base table information for updating or refreshing There is a problem in formating, but it showing error on recordset....why..?
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]
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()
I am currently stuck on a project where I am populating a datagrid from a series of labels and textboxes. I have that part down. Now for the part where I actually add it do the database, I am having a problem. It is actually adding everything to the database just like I want it but when it finishes adding the data from the datagridview, I am getting an error saying there are no values.
I have included the code I have been working with.
Private Sub btnsubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsubmit.Click Dim I As Integer For I = 0 To DataGridView1.Rows.Count - 1
