Read/Write/delete, Please help!

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Read/Write/delete, Please help!

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Topic

vadarv
Starting Member

1 Post

Posted - 2006-08-26 : 15:00:45

Hia!
I'm a total amateur to VBS but need help on a VBS script. This is used in a HMI system from Siemens called WinCC, used for process viewing and control.

What I need to is to write to a table in Access, then read these values and then delete records (rows) in Access.
By using help functions in WinCC I have this set up:

I created an Access database with the WINCC_DATA table and columns (ID,
TagValue) with the ID as the Auto Value.

Then I can write to Access by the following code:

Dim objConnection
Dim strConnectionString
Dim lngValue
Dim strSQL
Dim objCommand
strConnectionString = "Provider=MSDASQL;DSN=SampleDSN;UID=;PWD=;"
lngValue = HMIRuntime.Tags("Tag1").Read
strSQL = "INSERT INTO WINCC_DATA (TagValue) VALUES (" & lngValue & ");"
Set objConnection = CreateObject("ADODB.Connection")
objConnection.ConnectionString = strConnectionString
objConnection.Open
Set objCommand = CreateObject("ADODB.Command")
With objCommand
.ActiveConnection = objConnection
.CommandText = strSQL
End With
objCommand.Execute
Set objCommand = Nothing
objConnection.Close
Set objConnection = Nothing

This actually works fine, pure luck I guess!

Can anyone help me with scripts for:
1. Reading one record (row) according to a ID number
2. Deleting the a record (row) according to a ID number

I would be very thankful for any help!

Best regards
Vadar

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2006-09-01 : 18:13:49

Reading

strSQL = "SELECT * FROM WINCC_DATA WHERE TagValue = " & lngValue

Deleting

strSQL = "DELETE FROM WINCC_DATA WHERE TagValue = " & lngValue

Peter Larsson
Helsingborg, Sweden

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