ADO OriginalValue and UnderlyingValue Properties


Field Object Reference Complete Field Object Reference

The OriginalValue property returns a variant that contains the field value as it existed right after the last Update or UpdateBatch method call.

The UnderlyingValue property returns a variant that contains the current value of a field. This value does not necessarily show changes made by other users and may not be the latest value.

Tip: Use the Resync property of the Recordset object to get the latest values for all of the Field objects in the Fields Collection.

Tip: These properties can be used together to prevent update conflicts.

Syntax

objField.OriginalValue

objField.UnderlyingValue

Example

<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"

set rs = Server.CreateObject("ADODB.Recordset")
rs.open "customers", conn

set objfield=rs.fields("companyname")

'Some code..................

'Check for changes
rs.movefirst
while rs.eof=false
  if objfield.OriginalValue<>objfield.UnderlyingValue then
    response.write("Data has changed!<br>")
    response.write("Original value: ")
    response.write(objfield.OriginalValue & "<br>")
    response.write("Current value: ")
    response.write(objfield.UnderlyingValue & "<br>")
  end if
  rs.movenext
next

'More code...................

rs.Close
conn.close
%>

Field Object Reference Complete Field Object Reference

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