Kofax transformation - Update fields on form on validation - vba

Question

I use Kofax Transform to extract data from OCR.
For this i have a form with several inputs. Basically : name, surname, email.
My issue concerns the validation step.
I want to update the input fields on specific event (click on enter when the email field is selected and update the values from a database). On this database table I have 4 fields : id, name, surname and email
It's my first VBA expertience and I have to create a script:
Private Sub FillFormOneEmailValidated(ByVal pXDoc As CASCADELib.CscXDocument)
'define required properties
Dim rs As ADODB.Recordset
Dim cn As ADODB.Connection
Dim sqlRequest As String
Dim email As String
Dim dbHostServer As String
Dim dbUsername As String
Dim dbPassword As String
Dim dbName As String
Dim dbConnString As String
'Prapare the db connection
Set rs = New ADODB.Recordset : Set cn = New ADODB.Connection
dbHostServer = "127.0.0.1"
dbUsername = "root"
dbPassword = "root"
dbName = "dbtest"
'build the connection string and open connection to database
dbConnString = "Provider=MSDASQL;Driver={MySQL ODBC 5.3 Unicode Driver};
dbConnString = dbConnString & "Server=" & dbHostServer & ";"
dbConnString = dbConnString & "UID=" & dbUsername & ";"
dbConnString = dbConnString & "PWD=" & dbPassword & ";"
dbConnString = dbConnString & "database=" & dbName
'Create recordset and set conncetion
Set rs = New ADODB.Recordset : : Set cn = New ADODB.Connection
cn.ConnectionString = dbConnString
cn.Open
'build query
sqlRequest = "SELECT name, surname, email FROM users WHERE email = " & email
Set rs = cn.Execute(sqlRequest)
'iterate the values of the sql request
On Error Resume Next
rs.MoveFirst
pXDoc.Fields.ItemByName("name") = CStr(sqlRequest("name"))
rs.Close : Set rs = Nothing
cn.Close : Set cn = Nothing
End Sub
Here are my issues :
it seems that this code is not correct.
How can i "observe" an event on the email input (form) in KTA Transform ?

Answer 1

Avoid building sql query like that since its a potential injection risk. Look into using parameters. (Or hope nobody's kid is named bobby drop table, or be subject to a malicious user)
Also passwords in scripts are not recommended.
I'd look into the already built in functionalities of The database locator. And database dialog you can add to your validation mask.
If script is the only possible thing
You can use multiple events to to this. One way as you said is when the field is confirmed ValidationForm_AfterTableCellChanged.
You can see events available to you in the Project builder/Script editor by the dropdown options
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Not sure for KTA, but in normal KT you can debug and observe other how methods are doing by enabling the Script debugging in the synchronization options.
The error in the script looks obvious
sqlRequest is your query as String variable. You must get your row data from the recordset. (i have not checked the rest of the script)