Which one of these two ways would be more recommended to update a database with a given query string:
Option 1:
Dim query As String = "INSERT INTO employee VALUES (@Name, @Age)"
Dim command As New SqlClient.SqlCommand(query, sqlConnection)
Dim params As SqlParameter() = {
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When I run the following code I get two errors. The first is when I try to save a new set of data it tells me there is a "Syntax error in INSERT INTO statement". The second is when I try to save an update in tells me "No value given for one or more required parameters". I'm not sure why this is happening as before I added in Contact Deatails it saved fine.
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I'm writing a query to select all records that has any part of parameter. I have one table called Employees. Some people have name like this: John David Clark If the parameter is
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I should be able to get result back as long as there's a match in the parameters. If I use Function Contains (q.FirstName & " " & q.LastName).Contains(employeeName), I will not get any result back if employeeName is "John Clark" Function Contains looks only for next words from left to right. It doesn't match a single word at a time. So that's why I used this in the Linq to SQL:
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I have a vb.net application that I want to dynamically create a search criteria using a SQLDataSource. I was trying to dynamically generate a select statement with parameters, assign that string to the selectCommand for the SQLDataSource then selectively assign the parameters.
The issue is several fields (user id) (user name) (email addr)... that I wanted to allow the user to enter any number of these and construct the select given what they entered.
That works if I just construct the string. But I want to use parameters for some sql injection protection as that page will be viewable on the internet.
What happens is I assign the select command but the SqlDataSource does not pick up that there are now some parameters that were not there before.
as in.
Dim firstName As String = tbFirstName.Text
Dim userName As String = tbUserName.Text
Dim userIdFlag As Boolean = False
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I'm trying to edit the CommandText for the Insert Command in a TableAdapter in the Designer in vb.net. Whenever I make changes to the CommandText, Visual Studio (2008) automagically changes the Parameters to a Collection consisting of one Parameter that existed before editing the Command, immersed in a sea of complete garbage Parameters, and then I either have to undo (unless this was the first thing I tried editing, in which case I have to close the Designer to discard changes and reopen it) or manually change ALL the Parameters back to something that isn't complete garbage.
View 1 RepliesThis is the error I am getting:
System.Data.OleDb.OleDbException was unhandled
ErrorCode=-2147217904
Message="No value given for one or more required parameters."
Source="Microsoft JET Database Engine"
My code is :
cmd = New OleDbCommand("SELECT [Employee] FROM [PhoneRecord] Where [PhoneNumber]='[(216) 370-1793]'", con)
If con.State = ConnectionState.Closed Then con.Open()
Dim sdr As OleDbDataReader = cmd.ExecuteReader() <~~~ERROR
While sdr.Read = True
User1.Text = sdr.Item("Employee")
End While
sdr.Close()
This was working fine yesterday, today all I did was change the database and its location as well as update all the dataset objects, and now its not working. The only thing I am thinking is that I didn't copy the database to the program directory, but I tried to copy it into there manually and I am still getting an error.
I have been posting almost 4 questions now where I have received 2 answers being solved. These are simple questions which any one familar with VB.Net can solve easily. Please understand, I'm a newbie to VB.Net.
Now my next issue is; I have a a form which has text boxes from where the user has to enter the data for the MS Access backend. I am getting the error as INSERT SYNTAX Error when entering the data and clicking the Save button. What is wrong with my insert statemnet below which is at the click even of the Save button?I desperately need to get this application working.
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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
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Whenever I try to update a row in my database, it works, but as soon as I restart the application, the changed information resets.[code]....
View 10 RepliesI 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
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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)
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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 a postgresql database, one table. This table has a date column too.And I have this code:
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The problem is, that the pgreader returns no rows (the parameters are right and the database contains the data too).firstday and lastday are f.e. '2005.05. 01.', the ConvertDate function converts the date to '2005-05-01' (the dates are storen in this form in the database)And when the commandtext="select * from arfolyamok where datum between '2005-05-01' and '2005-05-31'", then it works, the pgreader has the rows.Why? What make I wrong?
Module Code
Imports System.Data.OleDb
Module modConnections
Public myConn As New OleDbConnection
Public myCmd As New OleDbCommand
Public MyDr As OleDbDataReader
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Module Code
Imports System.Data.OleDb
Module modConnections
Public myConn As New OleDbConnection
Public myCmd As New OleDbCommand
Public MyDr As OleDbDataReader
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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)
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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.
View 4 Repliesteaching 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:
'Biog datagridview
cnGrid.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:UsersPeterDocumentsDatabasesTestDatabase.mdb;User Id=admin;Password=;"
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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
da.Update(ds, "employeeTable")
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 )
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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"
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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
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What I am trying to do is update a label with a value from a sql table using a combobox.this is a record from the table concerned
Species_ID (PrimaryKey) | Species | Genus_ID | Avg_Length | Avg_Height | Est_Weight | Diet_ID
1 rex 1
46 18 14000
1
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.
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.
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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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