Visual Basic

3-Dec-04 8:41

I am importing records from a ODBC Database into Access. The import works fine, except I get duplicate entries in my Access Database. I need to run this process once a week. Can anyone tell me how I can eliminate importing the duplicate entries to my Access. Thanks.

Private Sub ImportToAccess()

Dim Con1 As New ADODB.Connection
Dim Con2 As New ADODB.Connection
Dim mySQL1 As String
Dim mySQL2 As String
Dim myDSN As String
Dim mySET As String
Dim tmpTable As String

'Connection parameters for Source Database
myDSN = "DSN=Springbrook1;UID=suresh;PWD=******;"
mySET = "set schema 'pub'"
mySQL2 = "select * from customer"

'Open Source Database
Con2.Open myDSN
Con2.Execute (mySET)

'Open Destination Database
Con1.Open _
"Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:\Temp\VB Sample Codes\mcwd\Connect Program\test1.mdb;" & _
"Jet OLEDB:Engine Type=5;"

'WORKS BUT CREATES DUPLICATE RECORDS
mySQL1 = "INSERT INTO [C:\Temp\VB Sample Codes\mcwd\Connect Program\test1.mdb].[tblCustomer] SELECT (Cust_No, First_Name) FROM [odbc;DSN=Springbrook1;UID=suresh;PWD=******;].[Customer]"

Con1.Execute mySQL1

Con1.Close
Con2.Close
Set Con1 = Nothing
Set Con2 = Nothing

End Sub

Jim Matthews3-Dec-04 9:00

3-Dec-04 9:00

if you're having problems importing duplicate records then the problem is with your A.) Data or B.) database design.

you might be better off finding help in the ADO/SQL forum, or if you'd like you can post what your tables look like and i can hve a quick look for you.

-jim

Suresh Prasad3-Dec-04 10:28

3-Dec-04 10:28

Jim:

It is a simple Table with 4 fields in it. An auto ID Field, Cust No Field, First Name Field and a Entry Time Field.

tblCustomer
ID
Cust_No
First_Name
Entry_Time

Each time the code is run, a new set of data is added to my Table. What I am trying to do is just to be able to update my table. Does this clarify the question?

Thanks

Jim Matthews3-Dec-04 10:51

3-Dec-04 10:51

what is the primary key of the table? does the table you're pulling from have a primary key as well, and is the structure the same?

-jim

Suresh Prasad3-Dec-04 10:56

3-Dec-04 10:56

The primary key in both tables is Cust_No. The structure is the same. However, the infomation inthe primary table may have the same information in Primary Field, but the rest of the data may cahnge. So while importing, I need to make sure it imports the modified or new data in the secondary table. Does this helps with question?

Dave Kreskowiak3-Dec-04 12:34

Dave Kreskowiak

3-Dec-04 12:34

In that case, you're going to need alot more code than this. You have to first check if the Cust_No exists in the table your copying this data to. If so, then you have to update that record with the new data. If not, you have to INSERT the new data.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Suresh Prasad3-Dec-04 12:38

3-Dec-04 12:38

THanks Dave:

I will try the statements. I assume the SELECET, UPDATE AND INSERT Statements will be used?

Serialization Gremlin

Tom John3-Dec-04 5:48

Tom John

3-Dec-04 5:48

Hey Guys

Try this:

<Serializable()> Public Class TestClass

    Public A As Integer = 100
    Public ASpecified As Boolean

End Class

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim ser As New System.Xml.Serialization.XmlSerializer(GetType(TestClass))
        Dim ms As New IO.MemoryStream

        ser.Serialize(ms, New TestClass)
        MsgBox(System.Text.ASCIIEncoding.UTF8.GetString(ms.ToArray))

End Sub

Then try changing ASpecified to Integer.

There seems be a problem with serializable methods/fields that end with the word Specified, can anyone else confirm that I'm not going round the bend... it's been an afternoon of pulling what little hair I have out tracking it down!

Cheers

Tom

Trapping Backspace

Brian Van Beek3-Dec-04 5:16

Brian Van Beek

3-Dec-04 5:16

I was wondering how to trap the backspace key with the keyPress event. Anyhelp would be much appreciated

Brian Van Beek

Re: Trapping Backspace

Jim Matthews3-Dec-04 5:47

Creating Controls at Run Time

3-Dec-04 5:47

i assume you're talking about the keypress of a textbox, so in your keypress event handler...

if (e.keycode = keys.back) then

'keys.back indicates the backspace key
'perform something here...

end if

hope this helps.

-jim

marclenoir20053-Dec-04 5:03

marclenoir2005

3-Dec-04 5:03

i'm working on a program right now, and i need show some informations on a form, but fact that information could be more than i thought, i need to create some labels at run time and place them on the form.

so, my Q is : how to create those labels at run time please?

regarding to you guys, sincere love.

marc

Re: Creating Controls at Run Time

Jim Matthews3-Dec-04 5:41

Error occurs when Creating Controls

3-Dec-04 5:41

creating them is pretty easy...

dim c as new windows.forms.control
dim b as new windows.forms.button
dim l as new windows.forms.label

the problem you're going to have is setting the location appropriately since the placement will have to be dynamic.

you can set the location for the controls by using:
c.location = new drawing.point(x,y)
etc.

hope this helps.

-jim

marclenoir20057-Dec-04 4:08

marclenoir2005

7-Dec-04 4:08

Hello Jim,

hope u're fine. Hum... i'm trying ur codes and an error occurs

at the first line.

ERROR is : "COMPILE ERROR
User-defined type not defined."

i forgot to mention that i was using vb6, so i don't if it's the real reason

of that occured error. i dont know what do u think about that?

let me know about that.

sincerely yours

marc

Re: Error occurs when Creating Controls

Jim Matthews7-Dec-04 4:34