Syntax error in INSERT INTO statement generated by OleDbCommandBuilder - vb.net

Why does this keep telling me
Syntax error in INSERT INTO statement
I searched for more details but it keeps telling me this.
This is the code :
Imports System.Data
Imports System.Data.OleDb
Public Class f9
Dim ds As New DataSet
Dim da As OleDb.OleDbDataAdapter
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
Dim sql As String
Private Sub f9_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
dbProvider = "Provider=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = E:\21.mdb"
con.ConnectionString = dbProvider & dbSource
con.Open()
sql = "SELECT * FROM snack"
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(ds, "snack")
da = New OleDb.OleDbDataAdapter(sql, con)
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles b1.Click
Me.Close()
x = x + (5 * 1)
If d.tc.Text = f7.b1.Text Then
Dim cb As New OleDb.OleDbCommandBuilder(da)
Dim dsNewRow As DataRow
dsNewRow = ds.Tables("snack").NewRow()
dsNewRow.Item("Date") = f1.d1.Text
dsNewRow.Item("Order") = d.tc.Text
dsNewRow.Item("Number Of Items") = b1.Text
dsNewRow.Item("Price") = " 5 "
dsNewRow.Item("Total") = x
ds.Tables("snack").Rows.Add(dsNewRow)
da.Update(ds, "snack")
con.Close()
End If
End Sub
End Class

Some of your field names are reserved words in Access SQL (Date, Order) and you also have a field name with spaces in it. The default configuration of the CommandBuilder will not produce valid SQL statements in cases like this.
To fix this issue, immediately after the line...
Dim cb As New OleDb.OleDbCommandBuilder(da)
...add the following two lines:
cb.QuotePrefix = "["
cb.QuoteSuffix = "]"
That will tell the command builder to enclose table and field names in square brackets ([]) so instead of generating a statement like
INSERT INTO snack (Date, Order, Number Of Items) VALUES ...
it will generate a statement like
INSERT INTO [snack] ([Date], [Order], [Number Of Items]) VALUES ...
Those square brackets are required for the SQL statement to be syntactically correct.

Related

vb.net Listboxes and sql

I have 4 List boxes that I check,the contents of which go to make up the variables that get placed into the sql statement.This works fine.The problem is I have to check ALL of the boxes.If I leave any of the boxes out the sql statement doesn't work. I Did try adding "" to the listbox but this didn't work and it looked messy.Is there a way around this.Many Thank Jim
HERE IS MY CODE:
Imports System.Data
Imports System.Data.OleDb
Imports System.Data.Odbc
Imports System.Data.DataTable
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
Dim ds As New DataSet
Dim tables As DataTableCollection = ds.Tables
Dim source1 As New BindingSource()
Dim da As New OleDb.OleDbDataAdapter
Dim sql As String
Dim aa As String = authorList.Text
Dim bb As String = publisherList.Text
Dim cc As String = yearpublishedList.Text
Dim dd As String = genreList.Text
dbProvider = "PROVIDER=Microsoft.ACE.OLEDB.12.0;"
dbSource = "Data Source =C:\Documents and Settings\james\Desktop\Authors.accdb"
con.ConnectionString = dbProvider & dbSource
con.Open()
sql = "SELECT * FROM books WHERE author = '" & aa & "' AND publisher = '" & bb & "' AND yearpublished = '" & cc & "' AND genre = '" & dd & "' "
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(ds, "Authors")
Dim view1 As New DataView(tables(0))
source1.DataSource = view1
DataGridView1.DataSource = view1
DataGridView1.Refresh()
'MsgBox("OPEN FOR LUNCH")
'MsgBox("CLOSED FOR THE DAY")
con.Close()
End Sub
End Class
You are parsing the checkboxes into a string, so when you do that, you get:
1,2,3,4,5,6,7
If you do not select one checkbox, it will look like this:
1,2,3,,5,6,7
So SQL will break
Several ways you can approach this to solve the issue, so I'm not going to attempt one. But this should hopefully explain to you what happens and why it happens so you can go ahead and fix

Syntax error in INSERT into statement when adding to access database

Someone please help me on finding the error on my code.
the error is at the line inside my try and catch where im trying to add record on my database Access. the error is "Syntax error in INSERT into statement". I already tried using
ds.Tables("Users").Rows.Add(dsNewRow)
da.Update(ds, "Users")
on my registration for voters and it works fine. idk why it doesnt work on this form (user registration).
Imports System.Data.OleDb
Public Class UserRegister
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
Dim ds As New DataSet
Dim da As New OleDb.OleDbDataAdapter
Dim sql As String
Private Sub Label4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label4.Click
End Sub
Private Sub UserRegister_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
dbProvider = " PROVIDER=Microsoft.jet.OLEDB.4.0;"
dbSource = "Data Source= C:\Users\Ronel\Documents\database\CSdatabase.mdb"
con.ConnectionString = dbProvider & dbSource
con.Open()
sql = "SELECT*FROM tblUsers"
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(ds, "Users")
MsgBox("Database now Open")
con.Close()
'MsgBox("Database now Close")
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cb As New OleDb.OleDbCommandBuilder(da)
Dim dsNewRow As DataRow
Dim empty =
Me.Controls.OfType(Of TextBox)().Where(Function(txt) txt.Text.Length = 0)
If empty.Any Then
MessageBox.Show(String.Format("PLEASE FILL ALL FIELDS:"))
Else
dsNewRow = ds.Tables("Users").NewRow()
dsNewRow.Item("Username") = TextBoxUser.Text
dsNewRow.Item("Password") = TextBoxPass.Text
dsNewRow.Item("LastName") = TextBoxFN.Text
dsNewRow.Item("GivenName") = TextBoxGN.Text
dsNewRow.Item("MiddleName") = TextBoxMN.Text
' Try
ds.Tables("Users").Rows.Add(dsNewRow)
da.Update(ds, "Users")
' Catch ex As Exception
MsgBox("Error updating")
' End Try
' Me.Dispose()
'Comelec.Show()
End If
End Sub
End Class
I see a few problems. First, your SQL statement needs some spaces in it. Instead of sql = "SELECT*FROM tblUsers", use sql = "SELECT * FROM tblUsers".
Second, when using OleDbCommandBuilder, the code connects to the database using the SELECT statement you provided for the DataAdapter, and uses that to generate the necessary SQL for Update, Delete, and Insert statements. The connection to the database needs to be open for this to occur -- you connection is closed at the point where the CommandBuilder is running. This is probably where the syntax error is coming from.
The CommandBuilder will create these statements using all of the fields specified in the SELECT. If you have fields in your Users table other than the five you are attempting to populate, the OleDbCommandBuilder is still going to build an INSERT statement that will attempt to fill those fields as well. Depending on how your table is structured, this may cause rows to be rejected if required fields aren't populated. To take a look at what SQL statements are being generated, you can look at properties of the DataAdapter object after using the CommandBuilder:
con.Open
sql = "SELECT * FROM tblUsers"
da = New OleDb.OleDbDataAdapter(sql, con)
Dim cb As New OleDb.OleDbCommandBuilder(da)
Debug.Print("SELECT: " & da.SelectCommand.CommandText)
Debug.Print("UPDATE: " & da.UpdateCommand.CommandText)
Debug.Print("DELETE: " & da.DeleteCommand.CommandText)
Debug.Print("INSERT: " & da.InsertCommand.CommandText)
Some additional reading on CommandBuilders is available here: http://msdn.microsoft.com/en-us/library/tf579hcz%28v=vs.110%29.aspx
Give this a try:
Imports System.Data.OleDb
Public Class UserRegister
Const dbProvider As String = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
Dim dbSource As String = "Data Source=C:\Users\Ronel\Documents\database\CSdatabase.mdb"
Dim con As New OleDb.OleDbConnection(dbProvider & dbSource)
Dim ds As New DataSet
Dim da As New OleDb.OleDbDataAdapter
'Specify only the fields you need
Dim sql As String = "SELECT UserName, Password, LastName, GivenName, MiddleName FROM tblUsers"
Private Sub UserRegister_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
con.Open()
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(ds, "Users")
' Get commands now, while connection is open. Do this once when the form is loaded, not every time button is clicked.
Dim cb As New OleDb.OleDbCommandBuilder(da)
con.Close()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' Validation code goes here
If empty.Any Then
MessageBox.Show(String.Format("PLEASE FILL ALL FIELDS:"))
Else
Dim dsNewRow As DataRow
dsNewRow = ds.Tables("Users").NewRow()
dsNewRow.Item("Username") = TextBoxUser.Text
dsNewRow.Item("Password") = TextBoxPass.Text
dsNewRow.Item("LastName") = TextBoxFN.Text
dsNewRow.Item("GivenName") = TextBoxGN.Text
dsNewRow.Item("MiddleName") = TextBoxMN.Text
Try
con.Open()
ds.Tables("Users").Rows.Add(dsNewRow)
da.Update(ds, "Users")
Catch ex As Exception
MsgBox("Error updating: " & Err.Description)
Finally
con.Close()
End Try
End If
End Sub
End Class

Syntax error (missing operator) in query expression 'Prod_Num ='

This Syntax error (missing operator) in query expression 'Prod_Num ='. always shows up when I'm trying to search an item in the database. Please help me.
Imports System
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Dim con As New OleDb.OleDbConnection
Dim cmd As OleDbCommand
Dim da As OleDb.OleDbDataAdapter
Dim ds As New DataSet
Dim dt As New DataTable
Dim sql As String
Dim dbp As String
Dim dbs As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
dbp = "Provider = Microsoft.ACE.OLEDB.12.0;"
dbs = "Data Source=" & Application.StartupPath & "/POS.accdb"
con.ConnectionString = dbp & dbs
con.ConnectionString = dbp & dbs
con.Open()
sql = "SELECT * FROM tblInventory"
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(dt)
dgList.DataSource = dt
txtPNum.Focus()
End Sub
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
dt.Clear()
txtPNum.Text = ""
sql = "SELECT * FROM tblInventory WHERE Prod_Num =" & txtPNum.Text
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(dt)
dgList.DataSource = dt
txtPName = dt.Rows(0).Item(1)
txtNOrder = dt.Rows(0).Item(2)
txtPRem = dt.Rows(0).Item(3)
txtPrice = dt.Rows(0).Item(4)
txtPNum.Focus()
End Sub
My guess is that you have problem here:
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
dt.Clear()
txtPNum.Text = "" ' <-----------------
sql = "SELECT * FROM tblInventory WHERE Prod_Num =" & txtPNum.Text
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(dt)
dgList.DataSource = dt
txtPName = dt.Rows(0).Item(1)
txtNOrder = dt.Rows(0).Item(2)
txtPRem = dt.Rows(0).Item(3)
txtPrice = dt.Rows(0).Item(4)
txtPNum.Focus()
End Sub
Remove this line:
txtPNum.Text = ""
Since you always clears the txtPNum textbox's text before passing it to the query.
NOTE:
Don't forget to implement it via parameterized query. This is not a good approach.
See parameterized query examples:
Example 1
Example 2
Hope it helps!
does txtPNum.Text contain any data?
Why don't you try checking that, because if it is empty your running SQL statement is "SELECT * FROM tblInventory WHERE Prod_Num =" which would raise that error.
Also if the Prod_Num column is integer, perhaps you should use int(txtPNum.Text) if that value is a string, this would also prevent SQL Injection.
In addition to the problem with txtPNum.Text that others have pointed out, I would recommend a couple of other things:
Use parameterized queries to avoid SQL Injection.
Use Using blocks with your connection, and close the connection as soon as you are done. In your Form_Load, for example, you open the connection and leave it open. That is not good practice.
Example:
Imports System
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Dim con As OleDbConnection
Dim cmd As OleDbCommand
Dim da As OleDbDataAdapter
Dim ds As New DataSet
Dim dt As New DataTable
Dim dbp As String
Dim dbs As String
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
dbp = "Provider = Microsoft.ACE.OLEDB.12.0;"
dbs = "Data Source=" & Application.StartupPath & "/POS.accdb"
Using con As OleDbConnection = New OleDbConnection(dbp & dbs)
con.Open()
da = New OleDbDataAdapter("SELECT * FROM tblInventory", con)
da.Fill(dt)
dgList.DataSource = dt
End Using
txtPNum.Focus()
End Sub
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
dt.Clear()
Using con As OleDbConnection = New OleDbConnection(dbp & dbs)
con.Open()
da = New OleDbDataAdapter("SELECT * FROM tblInventory WHERE Prod_Num = #ProdNum", con)
da.SelectCommand.Parameters.AddWithValue("#ProdNum", txtPNum.Text)
da.Fill(dt)
dgList.DataSource = dt
End Using
txtPName = dt.Rows(0).Item(1)
txtNOrder = dt.Rows(0).Item(2)
txtPRem = dt.Rows(0).Item(3)
txtPrice = dt.Rows(0).Item(4)
txtPNum.Focus()
End Sub
I would also recommend adding some Try Catch blocks to handle errors, and you may need to convert the values you're assigning to text boxes if they're something other than String.

how to retrieve data from database using select query

I have to retrieve data in two TextBoxes but the data should belong to tokennum that I am getting from first text box. I have a total of three TextBoxes and one button. In a database called db1 I have a table named Table1 and two fields ser as serial number, tokennum for token number and name for name of employees.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
Dim ds As New DataSet
Dim da As OleDb.OleDbDataAdapter
Dim sql As String
Dim a As Integer
dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
dbSource = "Data Source = C:\Documents and Settings\trainee-ng-it\Desktop\Subhedar Sir\New Folder (2)\db1.mdb"
con.ConnectionString = dbProvider & dbSource
con.Open()
a = Val(TextBox1.Text)
sql = "SELECT Table1.ser FROM Table1 where Table1.token num=a"
da = New OleDb.OleDbDataAdapter(sql, con)
da = New OleDb.OleDbDataAdapter(sql, con)
da.Fill(ds, "db1")
MsgBox("Database is now open")
con.Close()
MsgBox("Database is now Closed")
End Sub
End Class
#dhruva sir:thanks for guidance,i corrected that but now how to proceed?how to get respective data in the correspoding textboxes?
Your sql query is wrong
sql = "SELECT Table1.ser FROM Table1 where Table1.token num=a"
It should be something like this :
sql = "SELECT Table1.ser FROM Table1 where Table1.tokennum=" & a
Although the 'Table1.token num' is wrong, there cannot be a space within a column name, I hope that was just a typo and have corrected the same in the second query.
"SELECT Table1.ser FROM Table1 where Table1.tokennum= " + a
This is a start, but your question is not very clear

Visual Basic 2008 New Search Query

I'm trying to do a search through an access database I added to a project but I get this error: An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll"
Additional information: No value given for one or more required parameters.
The idea was to search the database for text entered into a textbox, then display the information on that row within more text boxes.
The code dr = cmd.ExecuteReader is also highlighted as an issue when debugging. I'm using visual basic 2008, and quite new to the whole coding scene so explanations as to why the issue has occurred would be appreciated!
Imports System.Windows.Forms
Imports System.Data.OleDb
Public Class frmSearch
Public con As OleDbConnection = New OleDbConnection
Public dr As OleDbDataReader
Dim dbProvider As String
Dim dbSource As String
Dim BillingSystemFolder As String
Dim TheDatabase As String
Dim FullDatabasePath As String
Private Sub frmSearch_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'BillingdatabaseDataSet.BillingInfo' table. You can move, or remove it, as needed.
Me.BillingInfoTableAdapter.Fill(Me.BillingdatabaseDataSet.BillingInfo)
dbProvider = "PROVIDER=Microsoft.ACE.OLEDB.12.0;"
'Setup the provider
TheDatabase = "/billingdatabase.accdb"
BillingSystemFolder = Application.StartupPath
FullDatabasePath = BillingSystemFolder & TheDatabase
'Set the database and the location of it
dbSource = "Data Source = " & FullDatabasePath
'Set the data source
con.ConnectionString = dbProvider & dbSource
'Set the connection string
End Sub
Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
con.Open()
txtJobNum.Clear()
txtName.Clear()
txtSurname.Clear()
Dim str As String
str = "SELECT * FROM BillingInfo WHERE (Code = " & CodeText.Text & ")"
Dim cmd As OleDbCommand = New OleDbCommand(str, con)
dr = cmd.ExecuteReader
While dr.Read()
txtSurname.Text = dr("Surname").ToString
txtName.Text = dr("First Name").ToString
txtJobID.Text = dr("Customer ID").ToString
End While
con.Close()
End Sub
End Class
Probably the field Code is a text field. In this case when you want to search using a particular value for that field you should enclose the value between single quotes.
Something like this
str = "SELECT * FROM BillingInfo WHERE (Code = '" & CodeText.Text & "')"
However this is really a bad practice because this allows to create an Sql Injection attack or it will simply fail because your value contains a single quote.
The correct method is using a parameterized query like this
str = "SELECT * FROM BillingInfo WHERE (Code = #p1)"
Dim cmd As OleDbCommand = New OleDbCommand(str, con)
cmd.Parameters.Add("#p1", OleDbType.VarWChar).Value = CodeText.Text
dr = cmd.ExecuteReader